Phone
1-800-MEDICARE (1-800-633-4227)
For specific billing questions and questions about your claims, medical records, or expenses, login to MyMedicare.gov, or call 1-800-MEDICARE.
If you want someone to be able to call 1-800-MEDICARE on your behalf or you want Medicare to give your personal information to someone other than you, you need to fill out an "Authorization to Disclose Personal Health Information."
TTY
1-877-486-2048
Mailing address
Centers for Medicare & Medicaid Services
7500 Security Blvd
Baltimore, MD 21244-1850