Skip to main content
Call
RARC M28 · Remittance Advice Remark Code

RARC M28 Remark Code: This does not qualify for payment under Part B when Part A coverage is exhauste…

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

Not an ICD-10 code. RARC M28 is a remittance-advice remark code published by X12 and carried on the 835 LQ segment. Any ICD-10 code with the same letters and digits (e.g., ICD-10 M15 osteoarthritis, N130 other urinary tract disorders) is a separate, unrelated code set used in diagnoses on the 837. Confirm the context before acting on this page.

TL;DR

RARC M28 (X12 This does not qualify for payment under Part B when Part A coverage is exhausted or not otherwise a…). Commonly paired with CARC 97, CARC 96. RARC M28 denies Part B for services eligible only under Part A.

Official X12 description

“This does not qualify for payment under Part B when Part A coverage is exhausted or not otherwise available.”

Source: X12 Remittance Advice Remark Codes. X12 publishes and maintains the RARC set; always verify against the current release before building a claim workflow.

Paired CARC codes

RARC M28 almost never appears alone — it accompanies one of the CARCs below on the same 835 remittance line. Fix the CARC and the RARC typically clears; the RARC alone is informational.

Paired CARCWhat the CARC means
CARC 97The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated.
CARC 96Non-covered charge(s).

What RARC M28 actually means

RARC M28 denies Part B for services eligible only under Part A. Route to correct Medicare part.

Common root causes

  • Service only payable under Part A.

Prevention checklist

  • Part A/B billing rules at charge capture.

Resolution & appeal strategy — step by step

Because RARC M28 is supplemental to a CARC, the resolution path usually starts by fixing the underlying adjustment reason. A formal appeal of the RARC alone is rarely necessary.

  1. 1Rebill Part A.
Sample reconsideration language referencing RARC M28
[Provider letterhead] Re: Reconsideration — Claim #{claim_number}, CARC 97 / RARC M28 Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} The 835 remittance on {remittance_date} carried RARC M28: "This does not qualify for payment under Part B when Part A coverage is exhausted or not otherwise available." We request reconsideration. The attached documentation rebuts the remark code: 1. [State the fact that rebuts the remark — authorization number, primary 835, modifier rationale, LCD citation, etc.] 2. [Reference the paired CARC and the corresponding fix] 3. [Attach the supporting document listed in step 1] Attached: {list supporting documents} Please process this line under the member's benefits. Contact the billing office at {provider_phone} for questions. Sincerely, {billing_manager_name}, {credentials}

Edit the bracketed fields before sending. Payer-specific reconsideration forms are often required — check the provider portal first.

How common is RARC M28?

Platform frequency
Pending ETL

Platform frequency ranks publish once the anonymized denial-rate pipeline reaches the publication threshold (strategy §12 Phase 2).

How QuickRCM handles RARC M28

QuickRCM reads RARC M28 alongside its paired CARC in the 835 LQ segment and routes the line to the correct worker queue with the right documentation already attached:

  • Denial routing rules tuned to the CARC+RARC pair — the paired combination tells QuickRCM which documentation the payer will accept.
  • Reconsideration template for this exact remark code pulls the supporting facts from the claim automatically.
  • Pre-submission scrubs that catch the preventable drivers surfaced on this page before the 837 leaves the clearinghouse.
See QuickRCM →Book a demo

Frequently asked questions — RARC M28

What does RARC M28 mean?

RARC M28 is an X12 Remittance Advice Remark Code. The official X12 definition is: "This does not qualify for payment under Part B when Part A coverage is exhausted or not otherwise available." It is supplemental to a Claim Adjustment Reason Code (CARC) on the same 835 line.

Which CARC is paired with RARC M28?

RARC M28 is most commonly paired with CARC 97, CARC 96. The CARC is the financial adjustment reason; the RARC is the informational remark. Fix the paired CARC first — the RARC usually clears with the corrected claim.

How do I resolve a RARC M28 remark on a remit?

Start from the root cause: Service only payable under Part A. First step: Rebill Part A. Because RARCs are supplemental, the resolution is almost always to address the paired CARC rather than appeal the RARC alone.

Where does RARC M28 appear on the 835 ERA?

RARC M28 is carried on the 835 Loop 2110 LQ segment alongside the CARC in the CAS segment of the same service line. The code and its X12 description also print on the paper EOB in the "Remark Code" or "Remark" column next to the corresponding denial or adjustment reason.

Is RARC M28 the same as ICD-10 code M28?

No. RARC M28 is a remittance-advice remark code published by X12 and carried on the 835. Any ICD-10 code with the same letters and digits is a diagnosis code on the 837 HI segment — a completely different code set maintained by the WHO/CMS. Use the transaction context (835 = RARC; 837 = ICD-10) to disambiguate.

Disclaimer

This page is operational reference for medical-billing professionals. It is not legal, clinical, or contractual advice. X12 code descriptors are maintained by the X12 External Code Lists; always verify against the current X12 release and the payer's own published policy before submitting or appealing a claim.