Denial Code CO-228

Corrected claim cover letter

Use this cover letter when resubmitting a corrected claim (not an appeal). Mark the claim with the correct resubmission code (UB-04 frequency 7, or the CMS-1500 Resubmission Code field) so the payer processes it as a correction rather than a duplicate.

[Your Practice Letterhead]
[Date]

[Payer Name]
Claims Department
[Payer Address]

Re: Corrected Claim Submission, Denial Code CO-228
Patient: [Patient Name]
Member ID: [Member ID]
Original Claim Number: [Original Claim Number]
Date of Service: [DOS]

To Whom It May Concern:

The above claim was returned with denial code CO-228 (Denied for failure of this provider, another provider or the subscriber to supply requested information to a previous payer for their adjudication). We are submitting a corrected claim to address the identified issue.

Correction summary:
[Describe the specific correction — e.g., added modifier 59, corrected rendering NPI, added prior authorization number, corrected place of service code, updated units for J-code.]

This corrected claim should replace the original submission. Please reprocess with the corrections noted above.

Sincerely,
[Provider Name or Billing Manager]
[NPI / TIN]
[Contact Phone]

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A corrected claim is a resubmission with data corrections, not an appeal. Mark the claim with the correct resubmission indicator: frequency code 7 for UB-04 institutional claims, or the Resubmission Code field on CMS-1500 professional claims. Most payers accept corrected claims within 60-90 days of the original adjudication. Verify the payer's current corrected-claim submission rules before sending.

CO-228 FAQ