Medicare Fax Number — Fax Medicare Claims and Forms
Medicare doesn't operate one central fax line. Enrollment, claims, and appeals are handled by regional Medicare Administrative Contractors and by the Part D and Medicare Advantage plans themselves, so the correct number depends on where you live and what you are submitting. Calling 1-800-MEDICARE is the fastest way to find the right fax destination for your specific form, claim, or redetermination request.
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Medicare Fax Number
Contact Medicare at 1-800-MEDICARE for current fax numbers
Hours: Medicare phone support: 24/7. Fax processing occurs during business hours.
Send a Fax NowWhat You Can Fax to Medicare
- Medicare enrollment forms
- Medicare Part D appeals
- Medicare Advantage plan changes
- Medicare Summary Notice disputes
- Prior authorization requests
Tip: Your Medicare Beneficiary Identifier (MBI) belongs on every page, along with the claim number if you are disputing a Medicare Summary Notice. Match the fax number to the contractor or plan named on the paperwork you are responding to, rather than reusing a number from an earlier letter. For appeals especially, a dated delivery receipt protects you against missing a redetermination deadline; Send FAX Mail provides one on every send.
Faxing to Medicare — FAQ
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