DentalMedical
Medicare Mississippi Part A Payer ID
Payer ID12M17
Payer details
- Payer ID
- 12M17
- Other payer IDs
- IMMS0
- Coverage types
- Dental, Medical
- Programs
- Medicare
- Payer website
- cms.gov
Other names
- Mississippi Medicare Part A Jurisdiction 7 (J7)
Where it operates
Mississippi
What You Can Check With Medicare Mississippi Part A
- Eligibility and benefits for any service type Medicare Mississippi Part A returns
- Instant results, 24/7, with no phone calls or portals
What a check returns is up to the payer: some return more detail than others.
Service Type Code LookupPayer details updated Oct 18, 2026. Payers change IDs and plan names; when in doubt, use the ID on the member's card.
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