The Medicare fax number is available on the contact page of the Medicare website. As of 2015, the number is 1-800-633-4227, according to Medicare.gov.
Individuals who wish to contact Medicare can also call 1-800-MEDICARE. The number is suitable for those who are looking for information about their medical records, expenses or claims, states Medicare.gov. Individuals can also log in into their Medicare account to contact Medicare by email with their questions. A mailing address is also available for those who want to mail documents or request information via post. The address is Centers for Medicare & Medicaid Services, 7500 Security Blvd, Baltimore, MD 21244-1850.