What does denial code CO-B7 mean?

CO-B7 means: The insurance company denied payment because the provider was not certified or eligible to perform and bill for this specific procedure or service on the date it was provided.. You received this denial for one of the following reasons: 1) the date of service (DOS) on the claim is prior to the provider's Medicare effective date or after his/her termination date, 2) the procedure code is beyond the scope of the provider's Clinical Laboratory Improvement Amendment (CLIA) certification, or 3) the laboratory service billed is missing a required modifier.

How do I resolve a CO-B7 denial?

If an error was made, make the necessary correction, and resubmit corrected line item(s) only. Resubmitting non-corrected line item(s) will result in a duplicate claim denial. If a reopening request is applicable, you may submit your request via the SPOT or the Interactive Voice Response (IVR). See full Medicare contractor resolution steps at tryarceum.com.

Can I appeal a CO-B7 denial?

Yes. Most CO-B7 denials can be appealed within 60-180 days depending on payer. This code is appealable if the provider can demonstrate they were properly certified and eligible on the date of service. Use our free tool to generate an appeal letter.

CARC Code

B7

🟡 Soft Denial

Provider Not Certified for Service

The insurance company denied payment because the provider was not certified or eligible to perform and bill for this specific procedure or service on the date it was provided.

authorization

Resolution: 85%Easy difficulty3-7 days avg

How to resolve this denial

Which payer denied this claim?

▶✓ Pre-action checklist — verify before contacting the payer

Review the full remittance advice (ERA/EOB) for additional RARC codes that explain the denial.
Verify the claim was submitted with correct patient eligibility and benefit information.
Check if this denial applies to a specific line item or the entire claim.

▶More about CO-B7 — stats, related codes, appeal template

85%

Recovery Rate

3-7 days

Avg. Resolution

Easy

Difficulty

Rare

Frequency

Payer-Specific Notes

How major payers handle CARC B7 by specialty.

General

Confirm payer-specific policy for CARC B7 and submit corrected claim or appeal as appropriate.

Common 835 Combinations

CARC B7 most often appears with these Group Code + RARC combinations on 835 remittances.

COCO-B7+N570Supplier Provider Transaction Access Number (PTAN) was not in effect on date of

Look up any combination →

Appeal Letter Template

Generic appeal template for CARC B7 denials.

Dear [Payer Name] Appeals Department, We are writing to appeal the denial of claim [CLAIM #] for patient [PATIENT NAME] (Member ID: [ID]) for services rendered on [DATE OF SERVICE]. The claim was denied with CARC B7: "This provider was not certified/eligible to be paid for this procedure/service on this date of service." We believe this denial is in error for the following reasons: [INSERT CLINICAL/ADMINISTRATIVE JUSTIFICATION] We respectfully request reconsideration and payment of this claim. Sincerely, [Provider Name / Billing Contact]

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