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RARC M15 · Remittance Advice Remark Code

RARC M15 Remark Code: Separately billed services/tests have been bundled as they are considered compo…

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

Not an ICD-10 code. RARC M15 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 M15 (X12 Separately billed services/tests have been bundled as they are considered components of the same pr…). Commonly paired with CARC 4, CARC 97. RARC M15 accompanies a bundling denial (usually CARC 97 or 231) and spells out that the denied service is considered a component of another procedure already paid.

Official X12 description

“Separately billed services/tests have been bundled as they are considered components of the same procedure. Separate payment is not allowed.”

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 M15 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 4The procedure code is inconsistent with the modifier used or a required modifier is missing.
CARC 97The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated.
CARC 231Mutually exclusive procedures cannot be done in the same day/setting.

What RARC M15 actually means

RARC M15 accompanies a bundling denial (usually CARC 97 or 231) and spells out that the denied service is considered a component of another procedure already paid. The fix is the same as for the underlying CARC: confirm whether the services were genuinely distinct, apply the correct modifier (59 / X{EPSU}) if so, and submit a corrected claim with supporting documentation.

Common root causes

  • NCCI PTP edit between two codes without an override modifier.
  • Payer-specific bundling policy treating an ancillary service as included.
  • Component code (e.g., an injection supply) bundled into the primary procedure.

Prevention checklist

  • NCCI edits at charge entry; payer-bundling policies kept current in the scrubber.
  • Documentation standards for distinct-procedure modifier use.

Resolution & appeal strategy — step by step

Because RARC M15 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. 1Work the underlying CARC (usually 97 or 231) — the RARC does not stand alone.
  2. 2If services were distinct, add the correct modifier and submit a corrected claim with op-note support.
Sample reconsideration language referencing RARC M15
[Provider letterhead] Re: Reconsideration — Claim #{claim_number}, CARC 4 / RARC M15 Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} The 835 remittance on {remittance_date} carried RARC M15: "Separately billed services/tests have been bundled as they are considered components of the same procedure. Separate payment is not allowed." 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 M15?

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 M15

QuickRCM reads RARC M15 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.
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Frequently asked questions — RARC M15

What does RARC M15 mean?

RARC M15 is an X12 Remittance Advice Remark Code. The official X12 definition is: "Separately billed services/tests have been bundled as they are considered components of the same procedure. Separate payment is not allowed." It is supplemental to a Claim Adjustment Reason Code (CARC) on the same 835 line.

Which CARC is paired with RARC M15?

RARC M15 is most commonly paired with CARC 4, CARC 97, CARC 231. 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 M15 remark on a remit?

Start from the root cause: NCCI PTP edit between two codes without an override modifier. First step: Work the underlying CARC (usually 97 or 231) — the RARC does not stand alone. Because RARCs are supplemental, the resolution is almost always to address the paired CARC rather than appeal the RARC alone.

Where does RARC M15 appear on the 835 ERA?

RARC M15 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 M15 the same as ICD-10 code M15?

No. RARC M15 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.