- Introduction
- About Medicare
- CMS Medicare Administrative Contractor Information
- Centers for Medicare & Medicaid Services
- Social Security Administration
- Medicare Secondary Payer
- How to File an Appeal with Original Medicare
- Medicare Quality Improvement Organization
- DME National Supplier Clearinghouse
- Railroad Retirees Part B Questions
- State Health Insurance Assistance Program
- Contacting Medicare
Medicare Quality Improvement Organization
Questions or complaints regarding quality of care and patient rights for a Medicare-covered service, please contact 1-800-MEDICARE (1-800-633-4227) to locate each state’s QIO.