Your provider ordered a treatment and the insurer said it isn't medically necessary — what that actually means
When an insurer denies a service as "not medically necessary" that your doctor ordered, they are saying their reviewer's clinical judgment overrides your doctor's. That reviewer may have less information about your case, may be applying criteria your doctor didn't know about, and may have reviewed your file for minutes. Before appealing, identify exactly what happened in that review.
A reviewer applied criteria to your case. You have the right to know which ones.
Medical necessity denials require the insurer to have applied specific clinical criteria to your case. Federal regulations require insurers to disclose the specific criteria used in utilization review decisions, including which clinical guidelines or standards were applied and who conducted the review.
If the denial letter does not specify which clinical criteria were applied, you are entitled to that information before you appeal. Appealing without it means arguing against criteria you don't know — and the insurer can respond to your appeal by citing different or additional criteria.
Sending more medical records to support medical necessity without first asking which specific clinical criteria were applied and who conducted the review. Adding evidence is useful — but only if you know what the standard is. If you don't know the criteria, you may be submitting documentation that addresses the wrong question.
Put the criteria and the reviewer on the record
Before drafting your appeal, request the following in writing:
- The specific clinical criteria or guidelines applied in the utilization review decision
- The name and credentials of the reviewer who made the determination
- Whether the reviewer is board-certified in the same specialty as your treating physician
- Copies of any clinical guidelines or criteria documents the insurer used
Insurers are required to provide this information under federal regulations (45 CFR 147.136 and ERISA 503). Many do not include it in the initial denial letter. Requesting it explicitly creates a paper trail and may reveal that the criteria applied are inconsistent with standard clinical practice.
"Please provide me with the specific clinical criteria, guidelines, or standards used to determine that [service] does not meet medical necessity criteria for my case, the name and specialty credentials of the reviewing clinician who made this determination, and copies of any clinical criteria documents the reviewer applied."
Send by certified mail or through the insurer's member portal. Their response — or failure to respond — shapes your appeal argument.
Peer-to-peer review and the specialty mismatch problem
Insurance utilization reviewers often are not specialists in the area relevant to your case. A general internist reviewing a denial of specialized physical therapy or a rare condition treatment may be applying general criteria without the clinical context your specialist has.
Many plans allow the treating physician to request a peer-to-peer review — a direct conversation between the treating provider and the insurer's medical reviewer. This is sometimes the fastest path to reversing a medical necessity denial, particularly when the reviewer was not aware of clinical nuances documented in your records.
Ask your provider whether they are willing to request a peer-to-peer. It typically requires a phone call from the provider's office and does not commit to anything — it's a conversation before a formal appeal.
Argue against the specific criteria, not just the general question
Once you have the specific criteria the insurer applied, your appeal should address those criteria directly. A strong medical necessity appeal shows:
- That your case meets the criteria the insurer cited, with specific clinical documentation
- Or that the criteria applied are inappropriate for your condition and why
- Or that the reviewer misapplied the criteria to your clinical facts
- Or that the treating physician's clinical judgment is supported by peer-reviewed evidence the insurer's reviewer did not consider
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Free denial classification — 30 secondsFrequently asked questions
Yes. Federal regulations under the ACA and ERISA require group health plans and insurers to disclose the specific clinical criteria used in utilization review decisions upon request. If the denial letter did not include this information, you can request it in writing. The insurer must provide it before or during your appeal.
A peer-to-peer review is a direct conversation between your treating physician and the insurer's medical reviewer — usually arranged by calling a specific number listed on the denial letter. It is typically initiated by the treating provider, not the member. The purpose is for your doctor to present clinical context that may not be apparent from the written record. Many denials are reversed at this stage, which is why requesting it early is often the most efficient first step for medical necessity denials.
That discrepancy is the core of a strong appeal. If the insurer applied proprietary criteria that are more restrictive than published clinical guidelines — such as those from major medical associations — your appeal can argue that the insurer's criteria are inconsistent with accepted clinical standards. Independent external review organizations frequently reverse denials on this basis.
Yes. After exhausting internal appeals, you are entitled to external review by an independent organization. For medical necessity disputes, external reviewers are required to apply generally accepted clinical standards — not the insurer's proprietary criteria. External review is particularly powerful when your treating physician's clinical judgment conflicts with the insurer's reviewer on a specialized clinical question.
Three pillars · classification, coordination, record-building · how coordination works → · administrative record-building, not legal action.