Medicare (Original / Part A & B)
MedicareAlso covers: CMS, Medicare Fee-for-Service, MAC
Payer ID
Varies — confirm via portal / clearinghouse
Use your regional MAC's payer ID (Novitas, Palmetto GBA, NGS, WPS, First Coast, Noridian, CGS).
Timely Filing Limit (TFL)
1 calendar year from the date of service (statutory)
Appeal Window
120 days from the remittance for a redetermination (first level)
Clearinghouse
Submit through your MAC / clearinghouse
Provider Services
Varies — confirm via portal / clearinghouse
Claims Fax
Varies — confirm via portal / clearinghouse
Claims Address
Varies — confirm via portal / clearinghouse
Provider Portal
https://www.cms.gov
Claims route to the Medicare Administrative Contractor (MAC) for your state. The 1-year timely-filing limit is set by federal law.
Values vary by plan, region, and contract and can change. Confirm in the payer portal or with your clearinghouse before filing. Last verified 2026-06-24.
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