Medicare Provider Phone Numbers by MAC

Checked against Medicare (MACs)’s own pages on October 18, 2026

Providers don’t call 1-800-MEDICARE (that line is for beneficiaries). For Part A and Part B claims and eligibility, call your Medicare Administrative Contractor (MAC). The MAC’s phone system asks for your NPI, PTAN and the last 5 digits of your Tax ID.

Phone numbers for providers

Novitas Solutions

For	Number and hours
Jurisdiction L (PA, NJ, MD, DE, DC): Part A and B	877-235-8073^[1]Mon-Fri 8am-4pm ET

Noridian

For	Number and hours
Jurisdiction E (CA, HI, NV, Pacific territories): Part A and B	855-609-9960^[2]Mon-Fri 6am-5pm PT
Jurisdiction F (AK, AZ, ID, MT, ND, OR, SD, UT, WA, WY): Part A and B	877-908-8431^[2]Mon-Fri 8am-6pm CT

National Government Services (Wellpoint Federal): provider portal contact lines

For	Number and hours
Jurisdiction 6 (IL, MN, WI): Part A	877-702-0990^[3]Mon-Fri 8am-4pm CTClosed for training the 2nd and 4th Friday mornings.
Jurisdiction 6 (IL, MN, WI): Part B	866-234-7340^[3]Mon-Fri 8am-4pm CTClosed for training the 2nd and 4th Friday mornings.
Jurisdiction K (CT, MA, ME, NH, NY, RI, VT): Part A	888-855-4356^[3]Mon-Fri 8am-4pm ETClosed for training the 2nd and 4th Friday mornings.
Jurisdiction K (CT, MA, ME, NH, NY, RI, VT): Part B	866-837-0241^[3]Mon-Fri 8am-4pm ETClosed for training the 2nd and 4th Friday mornings.

CGS

For	Number and hours
Jurisdiction 15 (KY, OH): Part B	866-276-9558^[4]Mon-Fri 8am-5pm ETPart B phone system: 866-290-4036.

WPS

For	Number and hours
Jurisdiction 5 (IA, KS, MO, NE): Part A and B (from the Part B phone guide)	866-518-3285^[5]Mon-Fri 7am-5pm CT
Jurisdiction 8 (IN, MI): Part A and B (from the Part B phone guide)	866-234-7331^[5]Mon-Fri 8am-5pm ET

First Coast Service Options

For	Number and hours
Jurisdiction N (FL, PR, USVI)	See the First Coast contact center page for Part A and Part B numbers^[6]Mon-Fri 8am-4pm ET/CT

Have this ready before you call

NPI, PTAN and the last 5 digits of your Tax ID (the phone system asks for these)
The patient’s Medicare Beneficiary Identifier (MBI), name and date of birth
Date of service (for claim status)

Skip the call: self-service

Each MAC runs a free provider portal (for example Novitasphere, the Noridian Medicare Portal, NGSConnex, myCGS, the WPS Portal and SPOT) for eligibility and claim status, and the phone system answers many questions without a representative.^[2]

Tips from billing teams

Palmetto GBA (Jurisdictions J and M) publishes its numbers on palmettogba.com; check there for your state.
MAC representatives refer providers to the phone system or the portal for claim status and eligibility, so start there.
Calling Medicare (MACs) many times a day? iAllo’s AI phone agent can dial, get through the phone menu and wait on hold, then handle the call or bring your teammate in when a person answers.

Questions

Can providers call 1-800-MEDICARE?

No. 1-800-MEDICARE is for beneficiaries. Providers call their Medicare Administrative Contractor (MAC) for Part A and Part B claims and eligibility.

What do I need to call my Medicare MAC?

Your NPI, PTAN and the last 5 digits of your Tax ID to get through the phone system, plus the patient’s MBI, name and date of birth, and the date of service for claim questions.

Stop waiting on hold with Medicare (MACs)

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Sources

iAllo is not affiliated with Medicare (MACs). Numbers and hours can change and can differ by plan and state; the number on the patient’s ID card comes first. Tell us at hello@iallo.io if something is out of date.