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RARC M30 · Remittance Advice Remark Code

RARC M30 Remark Code: Missing pathology report

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

Not an ICD-10 code. RARC M30 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 M30 (X12 Missing pathology report). Commonly paired with CARC 16, CARC 227. RARC M30 requires pathology report attachment — common for surgical and biopsy claims.

Official X12 description

“Missing pathology report.”

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 M30 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 16Claim/service lacks information or has submission/billing error(s).
CARC 227Information requested from the Billing/Rendering Provider was not provided or was insufficient/incomplete.
CARC 251The attachment/other documentation that was received was incomplete or deficient.
CARC 252An attachment/other documentation is required to adjudicate this claim/service.

What RARC M30 actually means

RARC M30 requires pathology report attachment — common for surgical and biopsy claims. Attach and rebill.

Common root causes

  • Pathology report not submitted.

Prevention checklist

  • Pathology-attachment automation.

Resolution & appeal strategy — step by step

Because RARC M30 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. 1Attach report and resubmit.
Sample reconsideration language referencing RARC M30
[Provider letterhead] Re: Reconsideration — Claim #{claim_number}, CARC 16 / RARC M30 Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} The 835 remittance on {remittance_date} carried RARC M30: "Missing pathology report." 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 M30?

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 M30

QuickRCM reads RARC M30 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 M30

What does RARC M30 mean?

RARC M30 is an X12 Remittance Advice Remark Code. The official X12 definition is: "Missing pathology report." It is supplemental to a Claim Adjustment Reason Code (CARC) on the same 835 line.

Which CARC is paired with RARC M30?

RARC M30 is most commonly paired with CARC 16, CARC 227, CARC 251, CARC 252. 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 M30 remark on a remit?

Start from the root cause: Pathology report not submitted. First step: Attach report and resubmit. Because RARCs are supplemental, the resolution is almost always to address the paired CARC rather than appeal the RARC alone.

Where does RARC M30 appear on the 835 ERA?

RARC M30 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 M30 the same as ICD-10 code M30?

No. RARC M30 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.