National Government Services Contractor Codes

The Contractor Code is a five-digit numeric code that indicates your MAC, also known as the Carrier Code, or Payer ID.

Part B Professional:

Part A Institutional:

HH+H

Alaska, Arizona, California, Hawaii, Idaho, Nevada, Oregon, Washington, Guam, Northern Marianna Islands, American Samoa 06014
Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont 14011
Michigan, Minnesota, New Jersey, New York, Puerto Rico, US Virgin Island, Wisconsin 06001

Reviewed 6/6/2024

Helpful Resources

Contact the EDI Help Desk:

888-379-9132

Available by phone or email Monday–Friday*
8:00 a.m.–5:00 p.m. ET
8:00 a.m.–4:00 p.m. CT

* Closed for training on the 2nd and 4th Thursday of the month.
12:00 p.m.–4:00 p.m. ET
11:00 a.m.–3:00 p.m. CT

ASCA Mailing Address:

National Government Services, Inc.
Attn: ASCA
P.O. Box 7022 | Indianapolis, IN 46207-7022

Form(s) you'll need:

ASCA Waiver Request Form
EDI Email Inquiry Form