What Is Fee-for-Service
Fee-for-service is a payment model where healthcare providers bill insurance companies and patients separately for each individual service, procedure, test, or office visit. Your doctor performs an MRI, you get billed for the MRI. Your cardiologist reads an EKG, you get billed for the EKG reading. Each service generates its own bill and its own line item on your Explanation of Benefits (EOB).
How It Affects Claim Denials
Fee-for-service creates a direct connection between service volume and provider revenue, which influences how insurers approach denials. When an insurer denies a claim under fee-for-service, they're often questioning medical necessity for that specific service, not the overall treatment plan. This matters for appeals because you need to address the exact service that was denied, not just defend your provider's general approach.
Common denial reasons in fee-for-service environments include: service deemed not medically necessary, lack of prior authorization, duplicate billing (same service billed twice), or the service exceeding frequency limits set by your plan. Your EOB will specify which service triggered the denial and cite the applicable policy section.
Prior Authorization and Fee-for-Service
Under fee-for-service arrangements, insurers frequently require prior authorization before certain services are performed. High-cost procedures like advanced imaging (MRI, PET scans), specialist referrals, and surgical interventions typically require pre-approval. Without authorization, your claim gets denied even if the service was medically necessary. The denial appears on your EOB as a "not authorized" or "not approved" decision.
When you appeal a fee-for-service denial based on lack of prior authorization, you have two paths: internal appeal (within your insurance company) or external appeal (through your state's independent review organization). Most states require insurers to complete internal appeals within 30 days for routine denials and 72 hours for urgent denials. If you lose the internal appeal, you can file an external appeal at no cost, though timelines vary by state.
How to Document Medical Necessity in Appeals
Insurers deny fee-for-service claims specifically because they claim a service wasn't medically necessary. To win an appeal, you need clinical evidence that your provider had valid medical reasons for ordering that service. Gather:
- Your provider's clinical notes explaining why they ordered the service and what symptoms or test results prompted it
- Any previous test results that justify ordering the new service (for example, abnormal blood work justifying further imaging)
- Peer-reviewed guidelines from organizations like the American College of Radiology or American Medical Association supporting the service for your specific condition
- Your complete medical history showing relevant diagnoses that make the service appropriate
Submit this documentation with your appeal letter, addressed to your insurer's medical review department, not the claims department. The medical reviewers are licensed physicians who evaluate whether the service meets your plan's medical necessity standards.
Fee-for-Service vs. Alternative Payment Models
Unlike bundled payments, where providers receive one flat fee for an entire episode of care (such as all costs related to a knee replacement), fee-for-service creates incentives for higher service volume. Unlike value-based care, which rewards providers based on patient outcomes and cost efficiency, fee-for-service pays regardless of whether the patient improves. This structural difference affects how aggressively insurers police denials. Fee-for-service environments typically see more denials because the insurer's main cost control lever is questioning individual service necessity.
State Regulations and Fee-for-Service Appeals
Your state's insurance commissioner's office enforces regulations around fee-for-service denials. Most states require insurers to provide written explanation of denial reasons, cite the specific plan language or medical policy used to make the decision, and offer both internal and external appeals. Some states like New York and California have stricter timelines, requiring insurers to approve or deny non-urgent claims within 15 business days. Check your state's insurance department website for specific appeal deadlines and requirements.
Common Questions
- If my provider didn't get prior authorization, can I still appeal? Yes. You can appeal arguing the service was urgent or that your provider reasonably believed authorization was obtained. Provide documentation showing when the service was performed, your clinical condition at the time, and any communication between your provider and the insurer. Some states require insurers to pay anyway if the authorization request was lost or delayed on their end.
- How long do I have to appeal a fee-for-service denial? Federal law gives you at least 180 days from the EOB date to file an internal appeal. After losing the internal appeal, you have 60 days to request an external appeal. Check your policy and state regulations, as some states extend these timelines to one year.
- What if the insurer says the service is experimental and therefore not covered? Request the specific clinical evidence, guidelines, or policy language the insurer used to make that determination. Your appeal should cite published clinical trials or professional society guidelines showing the service is standard care for your condition, not experimental. Organizations like the National Institutes of Health and Centers for Medicare and Medicaid Services publish lists of established treatments versus experimental ones.