DENIAL CODE · CO-B7

CO-B7: Provider Not Eligible

CARC B7 means the payer says the rendering provider wasn't eligible or credentialed to perform or bill this service on the date of service.

Official (X12/WPC): "This provider was not certified/eligible to be paid for this procedure/service on this date of service."
Written forBilling LeadPractice Manager

Why payers issue CO-B7

  • Credentialing wasn't complete or loaded by the date of service
  • The provider was enrolled but not linked to the group/TIN
  • The wrong NPI or taxonomy was on the claim
  • Supervising or locum rules weren't reflected

Is it recoverable? Recoverable once the effective date or correct NPI is shown — and they cluster around new hires, so the dollars concentrate.

How to appeal a Provider Not Eligible / Credentialing denial →

Common questions

What does CO-B7 mean?

CARC B7 means the payer says the rendering provider wasn't eligible or credentialed to perform or bill this service on the date of service. This provider was not certified/eligible to be paid for this procedure/service on this date of service.

How do I appeal or fix a CO-B7 denial?

Recoverable once the effective date or correct NPI is shown — and they cluster around new hires, so the dollars concentrate. Common causes: credentialing wasn't complete or loaded by the date of service; the provider was enrolled but not linked to the group/TIN; the wrong NPI or taxonomy was on the claim; supervising or locum rules weren't reflected.

Is a CO-B7 denial worth appealing?

Recoverable once the effective date or correct NPI is shown — and they cluster around new hires, so the dollars concentrate. You only pay on what's actually recovered, so there's no cost to working the ones that are winnable.

Other denial codes
CO-197 · Precertification / Authorization Absent →CO-50 · Not Medically Necessary →CO-16 · Missing or Invalid Information →CO-45 · Charge Exceeds Fee Schedule →CO-97 · Bundled into Another Service →CO-29 · Timely Filing Expired →CO-96 · Non-Covered Charge →OA-18 · Duplicate Claim →OA-22 · Coordination of Benefits →CO-11 · Diagnosis Inconsistent with Procedure →CO-151 · Too Many Services (Frequency/MUE) →CO-27 · Coverage Terminated →CO-204 · Not Covered Under Current Plan →CO-109 · Not Covered by This Payer →CO-119 · Benefit Maximum Reached →CO-4 · Modifier Inconsistent or Missing →CO-15 · Authorization Number Missing or Invalid →OA-23 · Prior Payer Adjudication Impact →CO-24 · Charges Covered Under Capitation →CO-26 · Expenses Incurred Prior to Coverage →CO-54 · Assistant Surgeon Not Covered →CO-55 · Experimental / Investigational →CO-58 · Inappropriate Place of Service →CO-59 · Multiple/Concurrent Procedure Reduction →CO-107 · Related/Qualifying Claim Not Identified →CO-167 · Diagnosis Not Covered →CO-170 · Denied for This Provider Type →CO-181 · Procedure Code Invalid on Date of Service →CO-182 · Procedure Modifier Invalid on Date of Service →CO-183 · Referring Provider Not Eligible to Refer →CO-185 · Rendering Provider Not Eligible →CO-198 · Precertification / Authorization Exceeded →CO-226 · Requested Provider Information Not Provided →CO-231 · Mutually Exclusive Procedures →CO-234 · Procedure Not Paid Separately →CO-236 · Procedure/Modifier Combination Not Compatible →CO-242 · Out-of-Network / Non-Network Provider →CO-252 · Documentation Required to Adjudicate →CO-253 · Sequestration Reduction →CO-256 · Not Payable Per Managed-Care Contract →CO-288 · Referral Absent →CO-B15 · Qualifying Service Not Received →CO-B16 · New Patient Qualifications Not Met →CO-A1 · Claim/Service Denied (Remark Required) →

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