DENIAL CODE · CO-182

CO-182: Procedure Modifier Invalid on Date of Service

CO-182 means the modifier billed wasn't valid on the date of service — typically a modifier that was retired or replaced, or one not yet active for that period.

Official (X12/WPC): "Procedure modifier was invalid on the date of service."
Written forBilling LeadPractice Manager

Why payers issue CO-182

  • The modifier was deleted or replaced in an annual update
  • A discontinued modifier was billed for a current date
  • The modifier wasn't effective yet on the date of service
  • A typo produced an invalid modifier

Is it recoverable? Recoverable — substitute the correct effective-dated modifier the documentation supports and resubmit.

How to appeal a Missing or Invalid Information denial →

Common questions

What does CO-182 mean?

CO-182 means the modifier billed wasn't valid on the date of service — typically a modifier that was retired or replaced, or one not yet active for that period. Procedure modifier was invalid on the date of service.

How do I appeal or fix a CO-182 denial?

Recoverable — substitute the correct effective-dated modifier the documentation supports and resubmit. Common causes: the modifier was deleted or replaced in an annual update; a discontinued modifier was billed for a current date; the modifier wasn't effective yet on the date of service; a typo produced an invalid modifier.

Is a CO-182 denial worth appealing?

Recoverable — substitute the correct effective-dated modifier the documentation supports and resubmit. 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-B7 · Provider Not Eligible →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-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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