The main Medicare Part B provider phone contact is through the general Medicare help line: 1‑800‑MEDICARE (1‑800‑633‑4227) , which is available 24/7 for most questions about coverage, billing, and claims.

Key phone numbers

  • General Medicare (including Part B) – Providers and beneficiaries
    • Phone: 1‑800‑MEDICARE (1‑800‑633‑4227).
* TTY: **1‑877‑486‑2048** for people with hearing or speech disabilities.

* Help with: claim status, coverage questions, appeals information, and how to reach the right contractor for your state.
  • Medicare Administrative Contractors (MACs) – Part B provider lines
    • Each region has its own Part B Provider Contact Center (PCC) with separate numbers (for example, Noridian’s Part B IVR line is 877‑908‑8431 for certain jurisdictions).
* Providers usually find the correct MAC Part B phone by checking their MAC’s website or the CMS contact tables for their state.

How to know which number to use

  • If you are a beneficiary or caregiver with a Part B question, start with 1‑800‑MEDICARE ; they can answer directly or route you appropriately.
  • If you are a billing office or medical provider , use your regional MAC’s Part B provider line (found on your MAC site or CMS contact lists) for detailed claim, enrollment, and technical billing questions.

Information gathered from public forums or data available on the internet and portrayed here.