Medicare (CMS) fax numbers

There is no general Medicare fax number. Claim appeals go to the contractor listed on your Medicare Summary Notice. The numbers below are only for the Benefits Coordination & Recovery Center (BCRC).

Last checked: October 4, 2026

Always check the number on your letter or form instructions. Agencies can change fax numbers without notice.

Purpose	Fax number	Who can use it
Benefits Coordination & Recovery Center (BCRC) – Data Collections / coordination of benefits correspondence	833-844-1427		Send fax to this number
Source: cms.gov, checked October 4, 2026 — For Medicare Secondary Payer / coordination of benefits matters, not for claims or appeals.
BCRC – Non-Group Health Plan (NGHP) recovery (liability, no-fault, workers’ compensation)	833-844-1540	Only for NGHP recovery cases initiated by the BCRC	Send fax to this number
Source: cms.gov, checked October 4, 2026 — Only for NGHP recovery cases initiated by the BCRC.
Workers’ Compensation Medicare Set-Aside Arrangement (WCMSA) proposals / final settlements	833-844-1428		Send fax to this number
Source: cms.gov, checked October 4, 2026 — WCMSA only.
Original Medicare claim appeal (redetermination)	ON YOUR LETTER (Medicare Summary Notice) Open official page
Source: medicare.gov, checked October 4, 2026 — No central fax. The contractor (MAC) and its contact details are on your Medicare Summary Notice (MSN).

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