This service is not covered when performed during the same session/date as a previously processed service (Updated for 2026)

Common Causes for CO-62

Denials with code CO-62 typically happen for the following specific reasons:

• Failure to append an appropriate modifier, such as Modifier 59, XE, XS, XP, or XU, to indicate that a procedure was distinct and independent from another service performed on the same day.
• Billing for mutually exclusive procedures or services that are considered integral component parts of a primary, more comprehensive procedure under CMS NCCI guidelines.
• Submitting claims for services that fall within a global surgical period and are considered part of the routine pre-, intra-, or post-operative care bundle.
• Overlapping services billed by different providers within the same group practice on the same day without clear documentation justifying separate encounters or medical necessity.

How to Prevent CO-62 Denials

To avoid receiving this denial in the future, implement these specific checks:

• Integrate and regularly update CMS National Correct Coding Initiative (NCCI) edit tables within the practice's electronic health record (EHR) and billing software.
• Train coding staff to carefully review clinical documentation to ensure that any appended modifiers, such as Modifier 59 or the 'X' modifiers, are fully supported by distinct anatomical sites, separate incisions, or separate sessions.
• Verify the patient's claim history and pre-existing processed claims for the same date of service prior to submitting secondary or subsequent procedural claims.
• Establish clear internal guidelines for multi-specialty practices to ensure that separate visits or procedures on the same day are billed with distinct, qualifying diagnoses and appropriate modifier designations.

Appeal Letter Template for CO-62

If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.

[Your Practice Header]
[Date]

[Payer Name]
[Appeals Department Address]

RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO-62 - This service is not covered when performed during the same session/date as a previously processed service

Dear Appeals Department,

I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-62: "This service is not covered when performed during the same session/date as a previously processed service".

We are writing to appeal the denial of the billed service under denial code CO-62, as the clinical documentation clearly supports that this service was separate, distinct, and medically necessary. In accordance with the American Medical Association (AMA) CPT coding guidelines and CMS National Correct Coding Initiative (NCCI) guidelines, the billed service was performed at a different anatomical site, through a separate incision, or during a completely distinct session from the previously processed service. The enclosed medical records detail the independent nature of this procedure, justifying the use of the appropriate modifier to bypass the standard bundling edits. We respectfully request that you review the attached clinical notes and reverse this denial to allow for full payment of this distinct service.

Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].

We respectfully request that you reprocess this claim for payment.

Sincerely,

[Your Name]
[Title]
[Practice Name]