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CARC 148 · CO-148

CARC 148 Denial: Information from another provider was not provided or was insufficient/incomple… — How to Fix and Appeal

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

TL;DR

CARC 148 (X12 Information from another provider was not provided or was insufficient/incomplete). CARC 148 denies the claim because information expected from another provider (e.g., referring provider, supervising physician, ordering lab) was missing or insufficient.

Official X12 description

“Information from another provider was not provided or was insufficient/incomplete.”

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 148 actually means

CARC 148 denies the claim because information expected from another provider (e.g., referring provider, supervising physician, ordering lab) was missing or insufficient. Obtain the needed information and resubmit.

Common root causes

  • Referring provider NPI missing or invalid.
  • Ordering physician not enrolled with the payer (PECOS for Medicare).
  • Collateral documentation (order, referral, H&P) absent from the claim.

Prevention checklist

  • PECOS/payer enrollment check on every ordering and referring provider at chart open.
  • Referral/order validation at charge posting for services requiring them.

Appeal strategy — step by step

Most CARC 148 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. 1Obtain the missing information and submit corrected claim with the referring/ordering provider data complete.
Sample appeal-letter language for CARC 148
[Provider letterhead] Re: Appeal of CARC 148 — Claim #{claim_number} Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} On {remittance_date} this claim was adjusted with CARC 148: "Information from another provider was not provided or was insufficient/incomplete." We respectfully request reconsideration. The X12 External Code List definition of CARC 148 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 148 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 148?

Search demand rank
#184

Out of 306 seeded CARCs, ranked by combined US monthly search volume for "CARC 148", "CO-148 denial", and "denial code 148".

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 148

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 148

What does CARC 148 mean?

CARC 148 is an X12 Claim Adjustment Reason Code. The official definition is: "Information from another provider was not provided or was insufficient/incomplete." In plain English, the payer is telling you cARC 148 denies the claim because information expected from another provider (e.g., referring provider, supervising physician, ordering lab) was missing or insufficient. Obtain the needed information and resubmit.

How do I resolve a CARC 148 (CO-148) denial?

Start with the most common root cause: Referring provider NPI missing or invalid. First step: Obtain the missing information and submit corrected claim with the referring/ordering provider data complete. See the full remediation and appeal checklist on this page before filing a formal appeal.

Is CARC 148 patient responsibility?

No — CARC 148 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 148 look like on an EOB or 835 remittance?

On the 835 ERA, CARC 148 appears in Loop 2110 CAS segment as "CAS*CO*148*{amount}". On a paper EOB the same code prints in the Adjustment/Denial Reason column with the X12 description: "Information from another provider was not provided or was insufficient/incomplete." — usually paired with one or more RARC remark codes in the same remittance line for additional context.

Which RARC is paired with CARC 148?

CARC 148 is commonly observed with RARC M127, N264. 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.