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CARC 150 · CO-150

CARC 150 Denial: Payer deems the information submitted does not support this level of service — How to Fix and Appeal

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

TL;DR

CARC 150 (X12 Payer deems the information submitted does not support this level of service). CARC 150 is a down-coding / level-of-service denial.

Official X12 description

“Payer deems the information submitted does not support this level of service.”

Source: X12 Claim Adjustment Reason Codes. The X12 External Code Lists are the single authoritative source for every CARC descriptor — always verify against the current release before building a claim-scrub rule.

What CARC 150 actually means

CARC 150 is a down-coding / level-of-service denial. The payer reviewed your claim (often through post-payment review or an automated E/M leveling tool) and concluded the documentation does not support the code you billed. The fix is almost always an appeal with the clinical record — provided the record actually supports the level billed under the applicable guidelines (2021 AMA E/M guidelines for office visits, 1995/1997 for other E/M categories where still in use).

Common root causes

  • E/M leveled too high relative to the documented history, exam, or MDM (for 1995/1997 E/M) or MDM / time (for 2021 E/M).
  • Hospital observation or inpatient admission without documentation of the clinical necessity for that level.
  • Critical-care time not documented at the minute level.
  • Unlisted procedure billed without a supporting report.

Prevention checklist

  • E/M auditing program with provider-level feedback and targeted coaching for outliers.
  • EHR-side E/M leveling tools should reference the 2021 AMA MDM / time guidelines, not outdated 1995/1997 tables, for office visits.
  • Enforce required-attachment logic for unlisted codes and for critical-care time documentation.

Appeal strategy — step by step

Most CARC 150 denials clear faster with the right remediation than with a formal appeal. Work the steps in order and escalate only when a lower-effort path has been ruled out.

  1. 1Pull the office note, verify it supports the billed level under the applicable guidelines, and appeal with a leveling-worksheet citation.
  2. 2For commercial-payer down-coders (e.g., Optum/EncoderPro-based), request the algorithm's coverage criteria and rebut point-by-point.
  3. 3If the note genuinely does not support the billed level, accept the down-code and educate the provider rather than appealing a losing case.
Sample appeal-letter language for CARC 150
[Provider letterhead] Re: Appeal of CARC 150 — Claim #{claim_number} Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} On {remittance_date} this claim was adjusted with CARC 150: "Payer deems the information submitted does not support this level of service." We respectfully request reconsideration. The X12 External Code List definition of CARC 150 does not apply to this claim for the following reasons: 1. [Cite the clinical / coding / policy fact that rebuts the adjustment] 2. [Cite the supporting documentation attached — op note, EOB, LCD/NCD citation, NCCI edit indicator, modifier rationale] 3. [Cite the payer's own policy where applicable] Attached: {list supporting documents} Please process payment under the member's benefits. If additional information is required, contact the billing office at {provider_phone} or {provider_email}. Sincerely, {billing_manager_name}, {credentials}

Edit the bracketed fields before sending. This template is a starting point; a payer-specific appeal form may still be required — check the provider portal first.

Payer-specific notes

Payer-specific behavior for CARC 150 publishes here as the QuickIntell anonymized denial ETL ingests sufficient volume. In the meantime, consult the payer directory for the relevant provider manual and appeal form.

How common is CARC 150?

Search demand rank
#34

Out of 306 seeded CARCs, ranked by combined US monthly search volume for "CARC 150", "CO-150 denial", and "denial code 150".

Platform frequency
Pending ETL

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

How QuickRCM prevents CARC 150

QuickRCM catches the root causes above before the 837 leaves the clearinghouse:

  • Claim-scrub rules fire on every root cause listed above — the scrub references the same X12 CAS segment logic that drives the denial, so what the payer checks, QuickRCM checks first.
  • When a denial lands, QuickRCM routes it to the correct worker with the documentation bundle already attached (op note, LCD citation, modifier rationale, EOB, primary 835).
  • Appeal templates tuned to each CARC (including this one) pull the supporting facts from the claim and fill the bracketed fields automatically.
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Frequently asked questions — CARC 150

What does CARC 150 mean?

CARC 150 is an X12 Claim Adjustment Reason Code. The official definition is: "Payer deems the information submitted does not support this level of service." In plain English, the payer is telling you cARC 150 is a down-coding / level-of-service denial. The payer reviewed your claim (often through post-payment review or an automated E/M leveling tool) and concluded the documentation does not support the code you billed. The fix is almost always an appeal with the clinical record — provided the record actually supports the level billed under the applicable guidelines (2021 AMA E/M guidelines for office visits, 1995/1997 for other E/M categories where still in use).

How do I resolve a CARC 150 (CO-150) denial?

Start with the most common root cause: E/M leveled too high relative to the documented history, exam, or MDM (for 1995/1997 E/M) or MDM / time (for 2021 E/M). First step: Pull the office note, verify it supports the billed level under the applicable guidelines, and appeal with a leveling-worksheet citation. See the full remediation and appeal checklist on this page before filing a formal appeal.

Is CARC 150 patient responsibility?

No — CARC 150 is typically carried under CO (Contractual Obligation) or OA (Other Adjustment), which means it is the provider's responsibility, not the patient's. Do not bill the patient unless the 835 CAS group code is PR.

What does CARC 150 look like on an EOB or 835 remittance?

On the 835 ERA, CARC 150 appears in Loop 2110 CAS segment as "CAS*CO*150*{amount}". On a paper EOB the same code prints in the Adjustment/Denial Reason column with the X12 description: "Payer deems the information submitted does not support this level of service." — usually paired with one or more RARC remark codes in the same remittance line for additional context.

Which RARC is paired with CARC 150?

CARC 150 is commonly observed with RARC M25, N115. The RARC narrows the reason — for example, pointing at a missing modifier, an LCD citation, or a specific policy. Fix the underlying CARC first; the RARC usually clears with the corrected claim.

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.