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N94 Remark Code: More Specific Taxonomy Code Required

N94 means the payer denied the claim or service because the provider taxonomy code submitted was too general. The payer needs a more specific taxonomy, one that identifies the provider's specialty or subspecialty, before it can decide how to pay.

Quick facts

Code
N94 (RARC N94)
Status
Active In use since January 1, 2000.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): A provider data issue. The amount stays with the provider until a claim with the specific taxonomy is processed; it is not billable to the patient.
Official description
Claim/Service denied because a more specific taxonomy code is required for adjudication.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N94 means

Taxonomy codes describe what kind of provider is billing or performing a service. Payers use them to decide which fee schedule, benefit rules, or network contract applies. When the taxonomy is at a high level, the payer cannot tell which of those rules to use. N94 tells you the taxonomy on the claim was valid but not specific enough.

This remark usually appears with CARC 16 or a provider-type reason code. It is fixable with a data correction in most cases.

Common causes

  • The practice entered a generic group or classification taxonomy instead of the provider’s specialization.
  • The billing provider’s taxonomy was sent, but the payer needed the rendering provider’s specific taxonomy on the line.
  • The provider’s enrollment with the payer lists a specific taxonomy that the claim does not match.
  • A new provider was set up in the billing system with a placeholder taxonomy.

How to fix it

  1. Look up the provider in NPPES and in the payer’s enrollment records to confirm the specific taxonomy on file.
  2. Update the claim. On an 837P, taxonomy is reported with the billing or rendering provider information. On a paper CMS-1500, many payers expect the rendering taxonomy in the shaded portion of box 24J with the ZZ qualifier in 24I, and billing taxonomy in box 33b; confirm the payer’s paper instructions.
  3. Send a corrected claim with resubmission code 7 in box 22 and the original claim number, or a new claim if the payer rejected the original outright.
  4. If NPPES or enrollment is wrong, update it first so future claims match.

How to prevent it

Store the specific taxonomy for every rendering and billing provider in your provider master, and review it when providers join or change specialties. Payer-specific edits that require taxonomy on certain services can be built into pre-submission checks. The NPI, TIN, and network denials guide covers the surrounding enrollment issues.

Codes that may appear with N94

  • CO-16 (Claim/service lacks information or has submission/billing error(s).): Information needed for adjudication is missing; N94 points to taxonomy specificity.
  • CO-8 (The procedure code is inconsistent with the provider type/specialty (taxonomy).): The procedure is inconsistent with the provider type or specialty, which the payer judges using taxonomy.
  • CO-170 (Payment is denied when performed/billed by this type of provider.): Payment is denied for this provider type, sometimes because a general taxonomy did not establish eligibility.
  • N288 (Missing/incomplete/invalid rendering provider taxonomy.): Rendering provider taxonomy is missing or invalid, rather than just too broad.
  • N255 (Missing/incomplete/invalid billing provider taxonomy.): The billing provider taxonomy is missing or invalid.
  • N95 (This provider type/provider specialty may not bill this service.): The provider type or specialty may not bill this service at all.

N94 FAQ

What counts as a 'more specific' taxonomy?

Taxonomy codes run from broad groupings to specific specialties. A code for a general category, such as a provider type without a specialization, may not tell the payer enough. Use the most specific code that matches the provider's actual licensure and practice.

Does the taxonomy on the claim need to match enrollment?

Many payers expect it to match the taxonomy on file with them or in NPPES. A mismatch can cause N94 or other provider-data denials.

Where do I find the provider's taxonomy?

In the provider's NPPES record and in the payer's enrollment file. They should agree with each other.