How do I resolve a CO-183 denial?

Verify the rendering or referring provider's enrollment status with this payer Check that the provider's NPI, taxonomy, and license are current and active See full resolution steps at tryarceum.com.

Can I appeal a CO-183 denial?

Yes. Most CO-183 denials can be appealed within 60-180 days depending on payer. This is appealable if the referring provider was actually eligible at the time of service or if incorrect provider information was submitted in error. Use our free tool to generate an appeal letter.

CARC Code

183

🔴 Hard Denial

Referring Provider Not Eligible

The claim was denied because the doctor or provider who referred the patient for this service is not allowed to make referrals according to the payer's rules. This could be due to credential issues, network status, or licensing restrictions.

authorization

Resolution: 35%Hard difficulty21-45 days avg

How to resolve this denial

Which payer denied this claim?

Verify referring provider credentials; obtain referral from eligible provider if needed

1
Verify the rendering or referring provider's enrollment status with this payer
2
Check that the provider's NPI, taxonomy, and license are current and active
3
If the provider is not enrolled, initiate enrollment before resubmitting
4
Obtain a re-referral or re-order from an enrolled, eligible provider if needed
5
Resubmit the claim with the correct enrolled provider information

Resolve this denial →

▶✓ 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-183 — stats, related codes, appeal template

35%

Recovery Rate

21-45 days

Avg. Resolution

Hard

Difficulty

Occasional

Frequency

Payer-Specific Notes

How major payers handle CARC 183 by specialty.

Blue Cross Blue Shield

BCBS requires appeal submission within 180 days for most plans.

Appeal Letter Template

Generic appeal template for CARC 183 denials.

We are submitting a formal appeal for claim [CLAIM_NUMBER] for patient [PATIENT_NAME], date of service [DOS]. This claim was denied/adjusted with CARC 183 indicating: "The referring provider is not eligible to refer the service billed.." We have reviewed the claim and are providing the attached documentation to support reconsideration. [SUPPORTING_DOCUMENTATION]. Please reconsider payment per the terms of our contract.

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