Payment made from a different fund (Updated for 2026)

Common Causes for CO-190

Denials with code CO-190 typically happen for the following specific reasons:

• The patient's services were covered and paid by a specialized federal or state program, such as the HRSA Uninsured Program, the Ryan White HIV/AIDS Program, or public health disaster funds.
• The claim was double-billed to both a primary commercial payer and a secondary government/public health carve-out fund.
• Workers' compensation or a specialized state-administered disability/accident fund has already assumed liability and disbursed payment for the treatment.
• Incorrect coordination of benefits (COB) setup led to routing the claim to a standard health plan instead of a designated specialty carve-out fund.

How to Prevent CO-190 Denials

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

• Implement robust front-desk screening and intake processes to identify patients covered under specialized public health, disaster relief, or government carve-out programs prior to billing.
• Set up clearinghouse edits to flag claims involving specific diagnosis codes that are historically funded through alternative state or federal mechanisms.
• Regularly verify and update the patient's coordination of benefits (COB) status to ensure claims are directed to the appropriate specialty fund first.
• Promptly reconcile payments received from alternative state or federal trust funds to prevent duplicate billing to commercial insurers.

Appeal Letter Template for CO-190

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-190 - Payment made from a different fund

Dear Appeals Department,

I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-190: "Payment made from a different fund".

We are writing to formally appeal the denial of claim number [Claim Number] under denial code CO-190 (Payment made from a different fund). Upon a thorough audit of our financial and clinical records, we have verified that the services rendered on [Date of Service] do not qualify for, nor have they received payment from, any alternative federal, state, or private carve-out trust funds. In accordance with CMS Coordination of Benefits (COB) guidelines and AMA billing rules, this health plan is the primary payer of record responsible for the patient's covered medical benefits. We request that this claim be immediately re-evaluated and processed for payment, as no external fund has disbursed reimbursement for these specific services.

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]