Contact 1-800 MEDICARE (1-800-633-4227)

Get general or claims-specific Medicare information and make changes to your Medicare coverage.
If you need help in a language other than English or Spanish, say “Agent” to talk to a customer service
representative. TTY 1‑877‑486‑2048

Social Security

Get a replacement Medicare or Social Security card, report a change to your address or name, find out if you’re eligible for Part A and/or Part B and how to enroll, apply for Extra Help with Medicare prescription drug costs, ask questions about Part A and Part B premiums, and report a death.
1‑800‑772‑1213 TTY 1‑800‑325‑0778

Medicare Coordination of Benefits Contractor (COBC)

Find out if Medicare or your other insurance pays first. Let the COBC know if you have other insurance, or if you need to report changes in your insurance information.
1‑800‑999‑1118 TTY 1‑800‑318‑8782

Department of Defense

Get information about TRICARE for Life and the TRICARE Pharmacy Program.
1‑866‑773‑0404 (TFL) TTY 1‑866‑773‑0405 1‑877‑363‑1303 (Pharmacy) TTY 1‑877‑540‑6261

Department of Health and Human Services Office for Civil Rights

If you think you were discriminated against or if your health information privacy rights were violated.
1‑800‑368‑1019 TTY 1‑800‑537‑7697

Department of Veterans Affairs

If you’re a veteran or have served in the U.S. military. 1‑800‑827‑1000 TTY 1‑800‑829‑4833

Office of Personnel Management

Get information about the Federal Employee Health Benefits Program for current and retired federal employees.
1‑888‑767‑6738 TTY 1‑800‑878‑5707

Railroad Retirement Board (RRB)

If you have benefits from the RRB, call them to change your address or name, check eligibility, enroll in Medicare,
replace your Medicare card, or report a death.
1‑877‑772‑5772 TTY 1‑312‑751‑4701

Quality Improvement Organization (QIO)

Ask questions or report complaints about the quality of care for a Medicare-covered service or if you think
Medicare coverage for your service is ending too soon (for example, if your hospital says that you must be discharged and you disagree). Visit or call 1‑800‑MEDICARE to get the phone number of your QIO.

for Original Medicare Billing Questions

Visit on the web to view the latest information on your claims. is Medicare’s secure online service for accessing your personal Medicare information. For immediate access to your claims information, visit on the web to register for this site.
As a registered user of, you can access your personalized information regarding your Medicare benefits and services. You can use to:

View claim status (excluding Part D claims)

Order a duplicate Medicare Summary Notice (MSN) or replacement Medicare card.

View eligibility, entitlement, and preventive services information

View enrollment information including prescription drug plans

View or modify your drug list and pharmacy information

View address of record with Medicare and Part B deductible status

Access online forms, publications, and messages sent to you by CMS

Call 1-800-MEDICARE (1-800-633-4227) TTY users should call 1-877-486-2048
You can also get information on your most recent claims without having to speak to a customer service representative.

Please be sure you have your Medicare number available before calling.

Listen to the status of your claims.

Find out your current deductible status.

Listen to your current prescription drug plan enrollment.

Get more help with your Medicare questions.

Order Medicare publications. (Some are available in large print, Spanish, audio-tape, and Braille.)

Important Notes About 1-800-MEDICARE
You can hear a recording with answers to frequently asked questions, and can order publications 24 hours a day, 7 days a week.
You can talk with a customer service representative 24 hours a day, 7 days a week.

If you are hearing impaired or speech impaired, call the TTY line toll-free at 1-877-486-2048.
This number is for the hearing and speech impaired. TTY (also known as Teletypewriter) is a terminal used for two-way text conversation over a telephone line. It is the primary tool used by deaf people (and some hard-of-hearing people) for telephone conversation.