Payer ID 12M17: Medicare Mississippi Part A
12M17 is the electronic payer ID for Medicare Mississippi Part A, according to the Stedi payer network directory. Enter 12M17 in loop 2010BB of an 837 claim - the payer name segment, with qualifier PI in NM108 and the ID in NM109 - to route the claim to Medicare Mississippi Part A. Payer IDs are assigned per clearinghouse, so confirm 12M17 on your own clearinghouse's payer list before you submit.
Payer ID 12M17 at a glance
- Electronic payer ID
- 12M17
- Claim location
- 837 loop 2010BB, NM109
Where payer ID 12M17 goes on a claim
On an electronic professional (837P) or institutional (837I) claim, the payer is identified in loop 2010BB, the payer name loop. The NM1 segment there carries entity identifier code PR (payer), the payer's name, the qualifier PI in NM108, and the payer ID itself in NM109:
NM1*PR*2*MEDICARE MISSISSIPPI PART A*****PI*12M17~The same NM1*PR structure names the payer in loop 2100A of 270 eligibility and 276 claim status requests. Many clearinghouses use one payer ID for claims, eligibility, and claim status, but some assign a separate ID per transaction, so check the payer list for each transaction type you send.
Before you submit to payer ID 12M17
Read the member's ID card
The claims payer ID or claims address printed on the card is the most specific source for that member's plan. Where it differs from a directory listing, the card generally reflects how that plan wants claims sent.
Check whether a third-party administrator runs the plan
Self-funded employer plans route claims to their administrator's payer ID, which is often different from the network or carrier name printed on the card.
Confirm the ID on your clearinghouse's payer list
Payer IDs are assigned per clearinghouse. Large national payers tend to use the same ID nearly everywhere; regional plans and administrators often do not. Search your clearinghouse's list for 12M17 and confirm it maps to Medicare Mississippi Part A.
Watch the acknowledgments, not just the remittance
A wrong payer ID fails at the clearinghouse or on the 277CA claim acknowledgment, not as a denial on the 835. A rejected claim was never received by the payer, so the timely filing clock keeps running until a corrected claim is accepted.
Medicare Mississippi Part A billing reference
Medicare Mississippi Part A writes dental, medical coverage in 1 state (MS). Rette indexes 86 Medicare Mississippi Part A policy documents - coverage criteria, prior authorization requirements, and billing guidelines.
Medicare Mississippi Part A timely filing, prior auth, and appeals
Payer ID 12M17 questions
- Which insurance company uses payer ID 12M17?
- Payer ID 12M17 belongs to Medicare Mississippi Part A in the Stedi payer network directory. Payer IDs are assigned per clearinghouse, so check 12M17 against your own clearinghouse's payer list before submitting.
- What is the Medicare Mississippi Part A payer ID?
- The Medicare Mississippi Part A electronic payer ID is 12M17. It goes in loop 2010BB of the 837 claim. Payer IDs are assigned per clearinghouse, so confirm 12M17 against your own clearinghouse's payer list before relying on it.
- Where do I enter payer ID 12M17 on an 837 claim?
- In loop 2010BB, the payer name loop: the NM1 segment with entity identifier PR, qualifier PI in NM108, and 12M17 in NM109. The same NM1*PR structure identifies the payer in loop 2100A of 270 eligibility and 276 claim status requests, though some clearinghouses assign a different payer ID for those transactions.
Payer IDs for related payers
Every payer ID in the directoryPayer IDs come from the payer network directory named above and are assigned per clearinghouse. Always confirm the ID with your clearinghouse and the member's card before submitting a claim.