How to Appeal CO-95 Denial: Plan procedures not followed
The claim was denied because the provider or patient did not follow the plan's required procedures (e.g., step therapy, network requirements). This guide explains what it means, why it happens, and exactly how to build a winning appeal.
Ready to appeal this denial?
Upload your EOB and get a professionally drafted appeal letter in 60 seconds — free.
What Does CO-95 Mean?
The claim was denied because the provider or patient did not follow the plan's required procedures (e.g., step therapy, network requirements).
Commonly seen in:
Step-by-Step Appeal Guide for CO-95
- 1
Locate any authorization number, date requested, or confirmation from the payer
- 2
Gather clinical documentation supporting the medical necessity of the service
- 3
Obtain records of any calls to the payer (dates, reference numbers, rep names)
- 4
Draft the appeal citing state retroactive authorization laws if applicable
- 5
Submit with documentation and follow up within 5 business days
Counter-Arguments to Use in Your Appeal
These are the strongest arguments medical billing professionals use to overturn CO-95 denials.
Document any circumstances that made following plan procedures impossible or harmful
For step therapy, provide evidence that prior step medications failed or were contraindicated
Cite state step therapy override laws requiring exceptions
If the plan's procedures were unclear, document any payer guidance received
Regulations and Guidelines to Cite
Citing specific regulations strengthens your appeal and demonstrates you know your rights.
Expert Tip for CO-95 Appeals
Step therapy denials are increasingly subject to state override laws. Provide clinical documentation of failure or contraindication to each required step.
Frequently Asked Questions
What is a CO-95 denial code?
The claim was denied because the provider or patient did not follow the plan's required procedures (e.g., step therapy, network requirements).
Can I appeal a CO-95 denial?
Yes. All insurance denials are appealable. Authorization denials can often be overturned with retroactive auth requests. Follow the step-by-step guide above and submit your appeal before the payer's deadline, typically 180 days from the denial date.
What documentation do I need to appeal CO-95?
For a CO-95 denial, you typically need: the original denial letter/EOB, clinical documentation supporting the service, any prior authorization records, and a cover letter citing the relevant regulations listed above. The specific documents depend on why the denial was issued.
How long does a CO-95 appeal take?
Most payers are required to process standard appeals within 30–60 days. Expedited appeals (for urgent care) must be decided within 72 hours. Under ERISA, group health plans must provide an appeal decision within 60 days for pre-service and 60 days for post-service claims.
Generate Your CO-95 Appeal Letter
Upload your denial letter and AppealAI will generate a professionally drafted, regulation-cited appeal letter in 60 seconds — free during beta.
Generate Your Appeal Letter Free →No account required. Free during beta. Draft generates in under 60 seconds.