Acronyms, initialisms, and alphabetisms are abbreviations that are formed using the initial components in a phrase or name. These components may be individual letters (as in CMS) or parts of words. The following acronyms are used frequently on the National Government Services, Centers for Medicare & Medicaid Services, Medicare, and health care industry Web sites.
| Acronym | Term |
|---|---|
| AARP | American Association of Retired Persons |
| ABG | arterial blood gas |
| ABN | Advance Beneficiary Notice of Noncoverage |
| ACH | acute care hospital |
| ADMC | advanced determination of Medicare coverage |
| ADP | automated data processing |
| ADR | additional development request |
| AFO | ankle-foot orthotic |
| AIC | amount in controversy |
| ALJ | Administrative Law Judge |
| ALOS | average length of stay |
| ALS | amyotrophic lateral sclerosis |
| AMA | American Medical Association |
| ANSI | American National Standards Institute |
| AOB | assignment of benefits |
| APC | ambulatory payment classification |
| ARD | assessment reference date |
| ASC | Accredited Standards Committee |
| ASCA | Administrative Simplification Compliance Act |
| ASP | average sales price |
| ATP | assistive technology practitioner |
| ATS | assistive technology supplier |
| AWP | average wholesale price |
| BBA | Balanced Budget Act of 1997 |
| BBRA | Balanced Budget Refinement Act of 1999 |
| BE | benefits exhausted |
| BIPA | Medicare, Medicaid and SCHIP Benefits Improvement and Protection Act of 2000 |
| BIB | break in billing |
| BIS | break in service (break-in-service claim) |
| BIU | Benefit Integrity Unit |
| CAC | Carrier Advisory Committee |
| CAD | computer-aided design |
| CAH | critical access hospital |
| CAM | computer-aided manufacturing |
| CAPD | continuous ambulatory peritoneal dialysis |
| CAT | computerized axial tomography |
| CB | Consolidated billing |
| CBA | competitive bidding area |
| CBIC | Competitive Bidding Implementation Contractor |
| CBSA | Core-based statistical area |
| CBT | computer-based training |
| CC | Condition code |
| CCPD | Continuous cycling peritoneal dialysis |
| CCN | claim control number |
| CCR | cost-to-charge ratio |
| CDC | CERT Documentation Contractor |
| CDE | Certified diabetic educators |
| CEDI | Common Electronic Data Interchange |
| CELIP | Claim expansion and line item processing |
| CERT | Comprehensive Error Rate Testing |
| CEU | Continuing education units |
| CF | Conversion factor |
| CFO | Chief financial officer |
| CFR | Code of Federal Regulations |
| CHOW | Change of ownership |
| CLIA | Clinical Laboratory Improvement Amendments |
| CMD | Contractor medical director |
| CMG | Case-mix group |
| CMHC | Community mental health center |
| CMN | Certificate of Medical Necessity |
| CMR | Comprehensive medical review |
| CMS | Centers for Medicare & Medicaid Services |
| CMS-1450 | Uniform Bill (UB-04) (for Part A) |
| CMS-1500 | Health Insurance Claim Form (for Part B and DME) |
| CMS-Â1696 | Appointment of Representative form |
| CMS-20034 | Request for Medicare Hearing by an Administrative Law Judge form |
| CMS-382 | ESRD Beneficiary Selection form |
| CMS-5011B | Request for Part B Medicare Hearing by an Administrative Law Judge form |
| CMS-588 | Electronic Funds Transfer (EFT) Authorization Agreement form |
| CMS-855S | Medicare Enrollment Application form |
| CMS-R-131 | Advance Beneficiary Notice of Noncoverage (ABN) form |
| CNM | Certified nurse midwife |
| CNS | Certified nurse specialist |
| CO | Central office (CMS, in Baltimore, MD) |
| CO | Contracting officer |
| CO | contractual obligation |
| COBC | Coordination of Benefits Contractor |
| COBRA | Consolidation Omnibus Budget Reconciliation Act of 1986 |
| COP | Conditions of participation |
| CORF | Comprehensive outpatient rehabilitation facility |
| CP | Clinical psychologist |
| CPI | Consumer price index |
| CPO | Care plan oversight |
| CPT/CPT-4 | Current procedural terminology |
| CPT | Claims processing timeliness |
| CR | Change Request |
| CRC | CERT Review Contractor |
| CRNA | Certified registered nurse anesthetist |
| CSI | Claim Status Inquiry |
| CSW | Clinical social workers |
| CWF | Common Working File (also known as HIMR) |
| DAB | departmental appeals board |
| DCN | document control number |
| DDE | Direct Data Entry |
| DGME | direct graduate medical education |
| DHHS | Department of Health and Human Services (also referred to as HHS) |
| DIF | DME Information Form |
| DME | durable medical equipment |
| DMECS | Durable Medical Equipment Coding System |
| DME MAC | Durable Medical Equipment Medicare Administrative Contractor |
| DMEPOS | durable medical equipment prosthetics, orthotics and supplies |
| DMERC | durable medical equipment regional carrier |
| DO | Doctor of osteopathy |
| DOA | date of accident |
| DOB | date of birth |
| DOD | date of death |
| DOJ | Department of Justice |
| DOL | Department of Labor |
| DOS | date of service |
| DPM | Doctor of podiatric medicine |
| DPU | distinct-part unit |
| DRA | Deficit Reduction Act of 2005 |
| DRG | diagnosis-related group |
| DSMT | diabetes self-management training |
| EDI | Electronic data interchange |
| EFT | Electronic funds transfer |
| EGHP | Employer group health plan |
| EIN | Employer Identification Number |
| E&M | Evaluation and management |
| EMC | Electronic media claim |
| EMR | Electronic medical record |
| EOB | Explanation of benefits |
| EPO | Epoetin |
| ER | Emergency room |
| ERA | Electronic remittance advice |
| ESA | Erythropoiesis stimulating agent |
| ESRD | End-stage renal disease |
| FAQ | Frequently asked question |
| FBI | Federal Bureau of Investigation |
| FCN | Financial control number |
| FI | Fiscal intermediary |
| FISS | Fiscal Intermediary Standard System (processing system for Part A) |
| FL | Field Locator |
| FOI | Freedom of Information |
| FOIA | Freedom of Information Act |
| FQHC | Federally qualified health center |
| GAO | General Accounting Office; or Government Accountability Office |
| GHP | Group health plan |
| GME | Graduate medical education |
| GPCI | Geographic practice cost index |
| HCO | High cost outlier |
| HCPCS | Healthcare Common Procedure Coding System |
| HHA | Home health agency |
| HIC | Health Insurance Claim (Number) |
| HICN | Health Insurance Claim Number |
| HIMR | Health Insurance Master Record (also known as CWF) |
| HIPAA | Health Insurance Portability and Accountability Act |
| HIPPS | Health insurance prospective payment system (code) |
| HIQA | Health Insurance Query Access (CWF) |
| HME | Home medical equipment |
| HMO | Health maintenance organization |
| HPSA | Health professional shortage area |
| HRSA | Health Resources Services Administration |
| HSQB | Health Standards Quality Bureau |
| IACS-PC | Individuals Authorized Access to CMS Computer Services—Provider Community |
| ICD-9-CM | International Classification of Diseases, Clinical Modification, 9th Revision |
| ICD-10-CM | International Classification of Diseases, Clinical Modification, 10th Revision |
| ICN | Internal control number |
| IDTF | Independent diagnostic testing facility |
| IIC | Inflation-indexed charge |
| IG | Inspector General |
| IME | Indirect medical education |
| IOM | (CMS) Internet-Only Manual |
| IPPE | Initial physical preventive examination |
| IPF | Inpatient psychiatric facility |
| IPPS | Inpatient prospective payment system |
| IRF | Inpatient rehabilitation facility |
| IRP | Inexpensive or other routinely purchased DME |
| IRVEN | Inpatient rehabilitation validation and entry |
| IV | Intravenous |
| IVR | Interactive voice response (system) |
| IRS | Internal Revenue Service |
| JSM | Joint Signature Memorandum |
| KAFO | Knee-ankle foot orthotic |
| LCD | Local coverage determination |
| LCL | Lowest charge level |
| LGHP | Large group health plan |
| LIDOS | Line item date of service |
| LIP | Low income payment |
| LOS | Length of stay |
| LPM | Liters per minute |
| LSO | Lumbar-sacral orthosis |
| LTC DRG | Long-term care diagnosis-related group |
| LTCH | Long-term care hospital |
| LTR | Lifetime reserve (days) |
| MAC | Medicare Administrative Contractor, Medicare appeals council |
| MAE | mobility assistive equipment |
| MAO | Medicare Advantage organization |
| MCE | Medicare code editor |
| MCFU | Medicaid Fraud Control Units |
| MCS | Multi-Carrier System (processing system for Medicare Part B) |
| MD | Doctor of medicine |
| MDS | minimum data set |
| MEDPARD | Medicare Participating Physician/Supplier Directory |
| MHO | Medicare hearing officer |
| MIP | Medicare Integrity Program |
| MMA | Medicare Modernization Act of 2003 |
| MPDIMA | Medicare Prescription Drug, Improvement, and Modernization Act of 2003 |
| MPFS | Medicare physician fee schedule |
| MPFSDB | Medicare physician fee schedule database |
| MREP | Medicare Remit Easy Print (software) |
| MRI | magnetic resonance imaging |
| MRN | Medicare redetermination notice |
| MSA | Metropolitan statistical area |
| MSN | Medicare Summary Notice |
| MSP | Medicare Secondary Payer |
| N&AH | nursing and allied health |
| NCD | national coverage determination |
| NCCI | National Correct Coding Initiative |
| NCPDP | National Council for Prescription Drug Programs |
| NDC | national drug code |
| NF | nursing facility |
| NOC | not otherwise classified (code) |
| NON PAR | nonparticipating provider |
| NP | nurse practitioner |
| NPI | National Provider Identifier |
| NPP | nonphysician practitioner |
| NPPES | National Plan and Provider Enumeration System |
| NPWT | negative pressure wound therapy |
| NSC | National Supplier Clearinghouse |
| NSF | national standard format |
| OAS | Office of Audit Service (of the Department of Health and Human Services) |
| OBRA | Omnibus Budget Reconciliation Act |
| OC | Occurrence code |
| OCE | Outpatient code editor |
| OCIG | Office of Counsel to the Inspector General |
| OD | Optometrist (doctor of optometry) |
| OI | Office of Investigations |
| OIFO | Office of Investigations Field Office (OIG) |
| OIG | Office of Inspector General |
| OMB | Office of Management and Budget |
| OPPS | Outpatient prospective payment system |
| ORF | Outpatient rehabilitation facility |
| ORU | Overpayment Recovery Unit |
| OSC | Occurrence span code |
| OSCAR | Online Survey, Certification and Reporting (OSCAR System) |
| OT | Occupational therapist/occupational therapy |
| OTR | On-the-record hearing |
| PA | policy article |
| PAI | patient assessment instrument |
| PA | physician assistant |
| PAR | participating provider |
| PCA | progressive corrective action |
| PDAC | Pricing, Data Analysis and Coding (Contractor) |
| PECOS | Provider Enrollment, Chain and Ownership System |
| PEN | parenteral and enteral nutrition |
| PHI | protected health information |
| PIN | Provider Identification Number |
| PIP | Periodic interim payment |
| P&O | prosthetic and orthotic |
| PMD | power mobility device |
| POE | Provider outreach and education |
| POS | place of service |
| POTR | Preliminary on-the-record hearing |
| POV | Power-operated vehicle |
| PPO | Preferred provider organization |
| PPS | prospective payment system |
| PPTN | Professional Provider Telecommunications Network |
| PPV | Pneumococcal pneumonia vaccine |
| PSC | program safeguard contractor |
| PT | physical therapist |
| PTAN | Provider Transaction Access Number |
| PWC | power wheelchair |
| QIC | Qualified independent contractor |
| QIO | Quality improvement organization |
| RA | Recovery Auditor |
| RBRVU | Resource-based relative value unit |
| RDF | Renal dialysis facility |
| RESNA | Rehabilitation Engineering and Assistive Technology of North America |
| RFA | Regulatory Flexibility Act |
| RHC | Rural health clinic |
| RHHI | Regional home health intermediary |
| RIC | Rehabilitation impairment category |
| RICO | Racketeering Influenced Corrupt Organization |
| RO | Regional office (CMS) |
| RRC | Rural Referral Center |
| RTP | return to provider |
| RUG | Resource utilization group |
| RVU | Relative value unit |
| SADMERC | Statistical Analysis DMERC (now referred to as the PDAC) |
| SCH | Sole community hospital |
| SHIP | State Health Insurance Program |
| SLP | Speech-language pathology |
| SNF | Skilled nursing facility |
| SPR | Standard paper remittance |
| SSA | Social Security Administration |
| SSN | Social Security Number |
| TEFRA | Tax Equity and Fiscal Responsibility Act of 1982 |
| TENS | Transcutaneous electrical nerve stimulator |
| TLSO | Thoracic-lumbar-sacral orthosis |
| TOB | Type of bill |
| TRU | Telephone reopening unit |
| UB | Uniform bill |
| UPIN | Unique Physician Identification Number |
| VA | Veterans Administration |
| VA | Veterans Affairs |
| VC | value code |
| VTC | Video teleconference |
| WAC | wholesale acquisition cost |
| WC | workers’ compensation |
| YTD | year to date |
| MSPRC | Medicare Secondary Payer Recovery Contractor |
| PHS | Public Health Services |
| BMM | Bone Mass Measurements |
| DPA | dual photon absorptiometry |
| FDA | Food & Drug Administration |
| HBV | Hepatitis B Virus |
| HIV | human immunodeficiency virus |
| MQSA | Mammography Quality Standards Act |
| CHC | Continuous home care |
| COLA | Cost of living adjustment |
| ECT | Electroconvulsive therapy |
| FMR | Focused medical review |
| GIP | General inpatient care |
| HIQH | Health insurance query for home health agencies |
| HHPPS | Home health prospective payment system |
| HHRG | Home health resource group |
| IDG | Interdisciplinary group |
| LPN | Licensed practical nurse |
| LUPA | Low utilization payment adjustment |
| NHPCS | National Hospice and Palliative Care Organization |
| NOE | notice of election |
| NOS | not otherwise specified |
| OASIS | Outcome and Assessment Information Set |
| PACE | Program of All-Inclusive Care for the Elderly |
| PEP | Partial episode payment |
| POC | Plan of care |
| PSC | patient status code |
| RAC | recovery audit contractor |
| RAP | Request for anticipated payment |
| RC | Revenue code/reason code |
| RHC | Routine home care |
| RN | Registered nurse |
| RNHCI | Religious nonmedical health care institution |
| SCHIP | State Children’s Health Insurance Program |
| S/LOC | Status/location |
| PRRS | Provider relations research specialist |
| CMI | Case-mix index |
| DSH | disproportionate share hospital |
| MDH | Medicare dependent hospital |
| PRM | Provider Reimbursement Manual (Medicare Publication 15-1/15-2) |
| PS&R | Provider Statistical & Reimbursement Report |
| SSI | Supplemental security income |
| ELGA | Eligibility Inquiry Part A |
| FY | Fiscal Year |
| ID | Identification |
| I/OCE | Integrated Outpatient Code Editor |
| MEDA | Medicare Part A |
| MUE | Medically Unlikely Edit |
| PCC | Provider Contact Center |
| TIN | Tax Identification Number |
| IP | Inpatient |
| OP | Outpatient |
| ZPIC | zone program integrity contractor |
| TMR | Targeted medical review |
| PER | Payment error rates |
| CER | Claim error rates |
| SER | Service error rates |
| KPS | Karnofsky performance status |
| PRN | Pro re nata |
| SOB | Shortness of breath |
| NCH | National Claims History (System) |
| MCPSS | Medicare contractor provider satisfaction survey |
| MRA | Medicare remittance advice |
| PFS | Physician fee schedule |
| DNF | do not forward |
| VMS | ViPS Medicare System |
| PQRI | Physician Quality Reporting Initiative |
| ICF | Intermediate care facility |
| MNT | Medical nutrition therapy |
| LSO | Local security officer |
| COPD | Chronic obstructive pulmonary disease |
| CARC | claim adjustment reason code |
| PO | Point of origin |
| CLFS | Clinical laboratory fee schedule |
| WOPD | written order prior to delivery |
| PQRS | Physician Quality Reporting System |
| RAD | respiratory assist devices |
| MPPR | Multiple procedure payment reduction |
| NUBC | National Uniform Billing Committee |
| MSA | medical service area |
| EDC | Enterprise data center |
| PCIP | Primary Care Incentive Program |
| COB | Coordination of benefits |
| HH+H | Home health plus hospice |
| HHH | Home health and hospice |
| POE AG | Provider Outreach and Education Advisory Group |
| NMO | National Mail Order (Program) |
| SPA | Single payment amount |
| LCMP | Licensed clinical medical professional |
| RARC | remittance advice remark codes |
| NTE | Note |
| RUL | Reasonable useful lifetime |
| MLN | Medicare Learning Network |
| APS | automated provider screening |
| ACA | Affordable Care Act |
| LCSW | Licensed clinical social worker |
| OCR | Optical character recognition |
| NFPP | National Fraud Prevention Program |
| NUCC | National Uniform Claim Committee |
| EHR | Electronic health record |
| MM | MLN Matters |
| HETS | HIPAA Eligibility Transaction System |
| CMS-460 | Medicare Participating Physician or Supplier Agreement |
| CMS-855A | Medicare Enrollment Application - Institutional Providers |
| CMS-855B | Medicare Enrollment Application - Clinics/Group Practices and Certain Other Suppliers |
| CMS-855I | Medicare Enrollment Application - Physicians and Nonphysician Practitioners |
| CMS-855O | Medicare Enrollment Application - Registration for Eligible Ordering and Referring Physicians and Nonphysician Practitioners |
| CMS-855R | Medicare Enrollment Application - Reassignment of Medicare Benefits |
| LICSW | Licensed independent clinical social worker |
| MCTRJCA | Middle Class Tax Relief and Job Creation Act |
| PPACA | Patient Protection and Affordable Care Act |
| SMRC | Supplemental Medical Review Contractor |
| PR | patient responsibility |
| EP | Eligible professional |
| QCDR | Qualified clinical data registry |
| HHS | United States Department of Health and Human Services |
| FECA | Federal Employee Compensation Act |
| FTE | full-time employee |
| GPO | U.S. Government Printing Office |
| SIA | supplemental instruction article |
| QR | Quick response (CMS-1500 code symbol) |
| AAPC | American Academy of Professional Coders |
| EEG | electroencephalogram |
| BIN | break in need |
| ADR | additional documentation request |
| BCRC | Benefits Coordination & Recovery Center |
| CRC | Commercial Repayment Center |
| UOS | unit of service |
| PII | personally identifiable information |
| HPID | Health plan identifier |
| IPP | Indirect payment procedure |
| IPP | Indirect payment procedure |
| OEID | Other entity identifier |
| HQRP | Hospice Quality Reporting Program |
| CQM | clinical quality measures |
| ADI | advance diagnostic imaging |
| SGR | sustainable growth rate |
| MCD | Medicare Coverage Database |
| BLS | basic life support |
| PCS | Physician Certification Statement |
| CPAP | continuous positive airway pressure |
| PAP | positive airway pressure |
| FFS | fee for service |
| IBT | intensive behavioral therapy |
| ADS | Automated Development System (Part B letter) |
| STI | sexually transmitted infections |
| CCI | Correct Coding Initiative |
| ALS | advanced life support |
| ASC | ambulatory surgical center |
| ET | eastern time |
| PT | physical therapy |
| PT | pacific time |
| PPS | palliative performance score |
| CT | central time |
| J6 | Jurisdiction 6 A/B Medicare Administrative Contractor |
| JK | Jurisdiction K A/B Medicare Administrative Contractor |
| JB | Jurisdiction B Durable Medical Equipment Medicare Administrative Contractor |
| CCN | CMS Certification Number |
| CCR | Customer Care Representative |
| DOA | date of accretion |
| CY | calendar year |
| FL | Form Locator |
| FTE | full-time equivalent |
| RA | remittance advice |
| HIH | health information handler |
| esMD | electronic submission of medical documentation |
| SMRC | Specialty Medical Review Contractor |
| MR | Medical Review |
| HIGLAS | Healthcare Integrated General Ledger Accounting System |
| CID | claim identification number |
| GAF | Geographic Adjustment Factor |
| DEA | Drug Enforcement Administration |
| SAMHSA | Substance Abuse and Mental Health Services Administration |
| OTP | Opioid Treatment Program |
| OSA | Obstructive Sleep Apnea |
| ACIP | Advisory Committee on Immunization Practices |
| ACP | advance care planning |
| AUC | appropriate use criteria |
| CDR | clinical dementia rating |
| CDSM | clinical decision support mechanism |
| CMS SOG | CMS Survey and Operations Group |
| COA | Certificate of Accreditation |
| COC | Certificate of Compliance |
| COR | Certificate of Registration |
| COW | Certificate of Waiver |
| FAST | functional assessment staging test |
| HRA | health risk assessment |
| IDE | Investigational Device Exemption |
| LVAM | Large Various Adjustment Macro |
| MAT | medication-assisted treatment |
| OPD | outpatient department |
| OUD | opioid use disorder |
| PAR | prior authorization request |
| PHE | public health emergency |
| PPMP | Provider Performed Microscopy Procedures |
| PWK | paperwork segment |
| SAD | self-administered drug |
| SEP | Separate enrollment period |
| STC | status information segment |
| USPSTF | United States Preventive Services Task Force |
| UTN | unique tracking number |
| A/P | Assessment/Plan |
| AA | Armed Forces Americas |
| AAA | abdominal aortic aneurysm |
| AAP | accelerated or advanced payment |
| AAPC | American Academy of Professional Coders |
| ACIP | Advisory Committee on Immunization Practices |
| ACOs | accountable care organizations |
| ACP | Advance Care Planning |
| ACT | Ask the Contractor |
| ADL | activities of daily living |
| AE | Armed Forces Africa |
| AE | Armed Forces Canada |
| AE | Armed Forces Europe |
| AE | Armed Forces Middle East |
| AED | automated external defibrillator |
| A-Fib | atrial fibrillation |
| AK | Alaska |
| AKI | acute kidney injury |
| AL | Alabama |
| AO | Authorized Official |
| AP | Armed Forces Pacific |
| API | application program interface |
| APM | Alternative Payment Model |
| APP | advanced practice provider |
| APRN | advanced practice registered nurse |
| AR | Arkansas |
| AR | accounts receivable |
| ASN | Associate of Science in Nursing |
| AUC | Appropriate Use Criteria |
| AZ | Arizona |
| BBA | Bipartisan Budget Act of 2018 |
| BHI | Behavioral Health Integration |
| BIE | billed in error |
| BMI | body mass index |
| BPCI | bundled payments for care improvement |
| BSN | bachelor’s degree in nursing |
| BSN | Bachelor of Science in Nursing |
| BSO | Back-Up Security Officer |
| CA | California |
| CABG | coronary artery bypass graft |
| CAC | certified ambulance coder |
| CACO | certified ambulance coder certification |
| CAHPS | Consumer Assessment of Healthcare Providers and Sy |
| CAHSAH | California Association for Health Services at Home |
| CAP | corrective action plans |
| CAR | chimeric antigen receptor |
| CASPER | Certification and Survey Provider Enhanced Reporti |
| CBC | complete blood count |
| CBRs | comparative billing reports |
| CBRs | credit balance reports |
| CCM | chronic care management |
| CCM CP | chronic care management care planning |
| CD | compact disc |
| CDSM | Clinical Decision Support Mechanism |
| CEC | Comprehensive End-Stage Renal Disease Care Model |
| CED | coverage with evidence development |
| CEHRT | Certified Electronic Health Record Technology |
| CEM | claim edit module |
| CEO | chief executive officer |
| CGS | Celerian Group Services |
| CHC | certified in healthcare compliance |
| CHIP | Children's Health Insurance Program |
| CJR | comprehensive care for joint replacement |
| CMMI | Capability Maturity Model Integration |
| CMMI | Center for Medicare & Medicaid Innovation |
| CMO | chief marketing officer |
| CMS IOM | Centers for Medicare & Medicaid Services Internet- |
| CMS SOG | Centers for Medicare & Medicaid Services Survey an |
| CMS-20027 | Medicare Redetermination Request Form - 1st Level |
| CMS-20033 | Medicare Reconsideration Request Form - 2nd Level |
| CMT | Chiropractic manipulative treatment |
| CMT | Case Management Team |
| CNP | certified nurse practitioner |
| CNS | clinical nurse specialist |
| CO | Colorado |
| COB | close of business |
| CoCM | collaborative care model |
| CPB | certified professional biller |
| CPC | certified professional coder |
| CPHM | certified professional in healthcare management |
| CPMA | certified professional medical auditor |
| CPPM | certified physician practice manager |
| CSCC | Claim Status Category Code |
| CSCs | Claim Status Codes |
| CSRs | customer service representatives |
| CT | computed tomography scan |
| CT | Connecticut |
| CTA | computed tomography angiography |
| CTP | computed tomography perfusion |
| CVD | cardiovascular disease |
| CXR | chest x-ray |
| DAC | Division of Acute Care |
| DC | District of Columbia |
| DE | Delaware |
| DG | Documentation Guidelines |
| DIAL | Disability Information and Access Line |
| DM | doctor of medicine |
| DO | Delegated Official |
| DPN | diabetic peripheral neuropathy |
| DPNA | denial of payment for new admissions |
| DRE | digital rectal examination |
| DVD | digital versatile disc |
| E&M | evaluation and management |
| EBRT | external beam radiation therapy |
| ECG | electrocardiogram |
| ECR | Electronic Cost Report |
| ED | Emergency Department |
| EIA | enzyme immunoassay |
| EIC | Entity Identifier Code |
| EIDM | Enterprise Identity Management |
| EIT | Enterprise Information Technology |
| EKG | electrocardiogram |
| ELISA | enzyme-linked immunosorbent assay |
| eMDR | electronic medical documentation request |
| eMDR | electronic medical documentation requests |
| EMG | electromyography |
| EMS | emergency medical service |
| eMSN | electronic Medicare Summary Notice |
| EMT | emergency medical technician |
| ENT | ears, nose, and throat |
| EOL | end of life |
| ERAs | electronic remittance advices |
| ERS | Extended Repayment Schedule |
| EUA | emergency use authorization |
| EUS | External User Services |
| F2F | face to face |
| FAQs | frequently asked questions |
| FBLP | Federal Black Lung Program |
| FCBC | fingerprint-based criminal background checks |
| FIPS | Federal Information Processing Standards |
| FISS DDE | Fiscal Intermediary Standard System Direct Data En |
| FL | Florida |
| FTD | face to face |
| FYE | Fiscal Year End |
| GA | Georgia |
| GAD-7 | General Anxiety Disorder-7 |
| GEP | general enrollment period |
| GERD | gastroesophageal reflux disease |
| GI | gastrointestinal |
| GU | Guam |
| HAART | highly active antiretroviral therapy |
| HAC | hospital acquired conditions |
| HBO | hyperbaric oxygen |
| HCFA | Health Care Financing Administration |
| HCRIS | Healthcare Cost Report Information System |
| HD | hemodialysis |
| HH | home health |
| HHCCN | Home Health Change of Care Notice |
| HI | Hawaii |
| HIFU | salvage high-intensity focused ultrasound |
| HIMSS | Healthcare Information Management Systems Society |
| HINN | Hospital-Issued Notice of Non-Coverage |
| HIS | Hospice Item Set |
| HITECH | Health Information Technology for Economic and Cli |
| HOPD | hospital outpatient department |
| HOPE | Hospice Outcomes and Patient Evaluation |
| HPI | history of present illness |
| HPV | human papillomavirus |
| HQIC | Hospital Quality Improvement Contractor |
| HQRS | Healthcare Quality Information System |
| HR | heart rate |
| I&A | Identity and Access |
| IA | Iowa |
| ICD-10 | International Classification of Diseases, Clinical |
| ICD-9 | International Classification of Diseases, Clinical |
| ID | Idaho |
| IDE | investigational device exemption |
| IEP | initial enrollment period |
| IL | Illinois |
| IM | intramuscular |
| IMRT | intensity-modulated radiation therapy |
| IN | Indiana |
| Inc. | incorporated |
| INR | international normalized ratio |
| iQIES | Internet Quality Improvement and Evaluation System |
| IRF-PAI | Inpatient Rehabilitation Facility-Patient Assessme |
| IVIG | intravenous immunoglobulin |
| KS | Kansas |
| KY | Kentucky |
| LA | Louisiana |
| LBN | legal business name |
| LDS | facial lipodystrophy syndrome |
| LGBTQ | lesbian, gay, bisexual, transgender, questioning |
| LLC | limited liability company |
| LLL | left lower lobe |
| LLP | lower limb prosthetic |
| LOB | line of business |
| LOINC | logical observation identifiers names and codes |
| LTSS | long-term services and supports |
| LUTS/BPH | lower urinary tract symptoms/benign prostatic hype |
| LVAM | large various adjustment macro |
| MA | Medicare Advantage |
| MA | Massachusetts |
| MACRA | Medicare Access and CHIP Reauthorization Act |
| MAR | Medication Administration Record |
| MBD | Medicare Beneficiary Database |
| MCO | managed care organization |
| MCR | Medicare Cost Report |
| MCReF | Medicare Cost Report E-Filing |
| MD | Maryland |
| MDM | medical decision making |
| ME | Maine |
| MEARIS | Medicare Electronic Application Request Informatio |
| MEI | Medicare Economic index |
| MH | Marshall Islands |
| MI | Michigan |
| MIPS | Merit-based Incentive Payment System |
| MM/DD/YY | month day year |
| MMDDYYYY | month day year |
| MMR | Medicare Monthly Review |
| MN | Minnesota |
| MO | Missouri |
| MOA | Medicare outpatient adjudication |
| MOA | Memorandum of Agreement |
| MOON | Medicare Outpatient Observation Notice |
| MP | Northern Mariana Island |
| MRA | magnetic resonance angiogram |
| MRADL | mobility-related activities of daily living |
| MS | Mississippi |
| MSG | Multiple Surgery Guidelines |
| MSG | message on remits |
| MSI | Medicare Administrative Contractor Satisfaction In |
| MSN | Master of Science in Nursing |
| MST | mountain standard time |
| MT | mountain time |
| MT | Montana |
| NAHC | National Association for Home Care & Hospice |
| NASS | North American Spine Society |
| NC | North Carolina |
| NCCPA | National Commission on Certification of Physicians |
| ND | North Dakota |
| NE | Nebraska |
| NGACO | Next Generation Accountable Care Organization |
| NGD | Next Generation Desktop |
| NGS | National Government Services |
| ngs/ml | nanograms per milliliter |
| NGS-ACE | National Government Services Advance Communication |
| NGSFS | National Government Services Financial Solutions |
| NH | New Hampshire |
| NHDD | National Healthcare Decisions Day |
| NHPCO | National Hospice and Palliative Care Organization |
| NIAM | National Immunization Awareness Month |
| NJ | New Jersey |
| NM | New Mexico |
| NOMNC | Notice of Medicare Noncoverage |
| NOS | number of service |
| NOTR | Notice of Termination/Revocation |
| NSV | network service vendor |
| NV | Nevada |
| NY | New York |
| OB | obstetrician |
| OEP | open enrollment period |
| OH | Ohio |
| OK | Oklahoma |
| OMHA | Office of Medicare Hearings and Appeals |
| OPD | outpatient department |
| OR | Oregon |
| OTA | occupational therapy assistant |
| OTC | over the counter |
| OTPP | occupational therapy private practice |
| OUD | opioid use disorder |
| PA | prior authorization |
| PA | Pennsylvania |
| PA | professional association |
| PAMA | Protecting Access to Medicare Act |
| PAR | prior authorization request |
| PARHM | Pennsylvania Rural Health Model |
| PBDs | provider-based departments |
| PC | professional corporation |
| PCE | Primary Care Exception |
| PCP | primary care physician |
| PCTI | physician certification of terminal illness |
| PDGM | Patient-Driven Groupings Model |
| PE | practice expense |
| PE | Provider Enrollment |
| PEPPERs | Program for Evaluating Payment Patterns Electronic |
| PET | positron emission tomography |
| PEX | Provider Experience |
| PFSH | past, family, and social history |
| PHE | Public Health Emergency |
| PHN | postherpetic neuralgia |
| PHP | Partial Hospitalization Program |
| PHQ-2 | Patient Health Questionnaire-2 |
| PHQ-9 | Patient Health Questionnaire-9 |
| PIDD | primary immune deficiency disease |
| PLLC | professional limited liability company |
| PMH | past medical history |
| POA | present on admission |
| POA | power of attorney |
| PPPS | personalized prevention plan service |
| PPT | PowerPoint |
| PR | Puerto Rico |
| PRRB | Provider Reimbursement Review Board |
| PRSS | pressure reducing support surfaces |
| PSA | prostate specific antigen |
| PST | pacific standard time |
| PT/INR | prothrombin time international normalized ratio |
| PTA | physical therapist assistant |
| PTPP | physical therapy private practice |
| PUF | Public Use File |
| PWK | paperwork |
| QCDRs | Qualified clinical data registries |
| QHCP | qualified health care professional |
| QIES | Quality Information and Evaluation System |
| QIN-QIO | Quality Innovation Network-Quality Improvement Org |
| QMs | quality measures |
| QPP | Quality Payment Program |
| QRDA | Quality Reporting Document Architecture |
| QRP | Quality Reporting Program |
| QRPs | quality reporting programs |
| R&D | research and development |
| RA | radiologist assistant" |
| RC | revenue code |
| RC | reason code |
| RF | radio frequency |
| RFI | request for information |
| RI | Rhode Island |
| ROS | review of systems |
| SA | state agency |
| SBIRT | Screening, Brief Intervention, & Referral to Trea |
| SBRT | Stereotactic Body Radiation Therapy |
| SC | subcutaneous |
| SC | South Carolina |
| SCF | Settlement Conference Facilitation |
| SD | South Dakota |
| sDNA | Stool DNA |
| SDV | single dose vial |
| SE | Special Edition |
| SEI | Software Engineering Institute |
| SEP | special enrollment period |
| SIA | service intensity add-on |
| SME | subject matter expert |
| SNF HAI | Skilled Nursing Facility Healthcare Associated Inf |
| SNF PDGM | skilled nursing facility patient driven payment mo |
| SNF PPS | skilled nursing facility prospective payment syste |
| SO | Security Official |
| SPADEs | Standardized Patient Assessment Data Elements |
| SRS | Stereotactic Radiosurgery |
| SSMs | Shared System Maintainers |
| STD | sexually transmitted disease |
| TBD | to be determined |
| TIFF | tagged image file format |
| TKA | Total Knee Arthroplasty |
| TN | Tennessee |
| TPID | Transaction Partner Identifier |
| TPL | third party liability |
| TPN | total parenteral nutrition |
| TRPV1 | transient receptor potential vanilloid |
| TX | Texas |
| U.S. | United States |
| UPIC | Unified Program Integrity Contractor |
| URL | Uniform Resource Locator |
| USB | universal serial bus |
| USPS | United States Postal Service |
| USPSTF | United States Preventive Services Task Force |
| UT | Utah |
| UTN | unique tracking number |
| VA | Veterans Affairs |
| VA | Virginia |
| VAD | ventricular assist device |
| VBID | Value-Based Insurance Design |
| VBP | Value-Based Purchasing |
| VED | vacuum erection device |
| VI | Virgin Islands |
| VT | Vermont |
| WA | Washington |
| WI | Wisconsin |
| WIA | Wage Index Appeals |
| WPC | Washington Publishing Company |
| WV | West Virginia |
| WY | Wyoming |
| APC | Advance Practice Clinician |
| CPM | Chronic Pain Management |
| DLS | date last seen |
| POCT | point of care test |
| RSV | respiratory syncytial virus |
| IOP | Intensive Outpatient Program |
| SWO | standard written order |
| SUD | substance use disorder |
| CAA 2023 | Consolidated Appropriations Act of 2023 |
| EMTALA | Emergency Medical Treatment and Labor Act |
| DNA | deoxyribonucleic acid |
| RNA | ribonucleic acid |
| MFT | marriage and family therapist |
| MHC | mental health counselor |
| PPEO | Provisional Period of Enhanced Oversight |
| SDOH | social determinants of health |
| TPE | targeted probe and educate |