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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsA “not medically necessary” denial is usually a plan decision you can challenge. Start with the written denial, find the exact service, reason, plan rule and filing deadline, then submit a focused internal appeal supported by your treating clinician’s records. If waiting could seriously threaten your life or ability to regain maximum function, request expedited review. If the plan upholds the denial, the notice may give you the right to an independent external review.
The correct procedure depends on whether you have an individual policy, an employer plan, Medicare, Medicare Advantage, Medicaid or CHIP, and whether the care was requested in advance or already received. Treat the denial notice and your plan documents—not a generic internet deadline—as the controlling instructions.
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1. Read the denial before you appeal
Do not begin by sending a general statement that you need the treatment. First identify exactly what the insurer decided and why. Keep the entire notice, including any explanation of benefits (EOB), in a file.
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- Service and dates: Record the treatment, procedure, medication or equipment at issue, the dates of requested or completed care, and the claim or authorization number.
- Denial reason: Note the precise medical-necessity language, clinical guideline, policy provision or medical policy cited. A notice may also identify a separate coding, benefit, network or prior-authorization problem.
- Stage of care: Determine whether this is a pre-service denial (care has not occurred), a concurrent denial (care is underway) or a post-service claim denial.
- Appeal instructions: Copy the deadline, submission method, mailing address, fax number or portal, required form and documents, and the department handling the appeal.
- Further-review rights: Look for instructions about an expedited appeal, a final internal determination and independent external review.
Call the insurer if anything is missing. Ask for the records and clinical criteria used in the decision, how to obtain the plan’s medical policy, and whether the denial is based on more than medical necessity. Write down the representative’s name or identification number, the date and time, and what the representative says. A phone conversation does not replace a written appeal.
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2. Build a targeted internal appeal
An internal appeal asks the insurer to reconsider its own decision. Use the insurer’s form if one is required, but attach a separate written statement so you can answer each reason in an organized way.
Ask the treating clinician to address the actual rationale
Request a letter from the physician or other treating professional who knows your case. The letter should explain why the requested service is appropriate for you, not merely state that it is “necessary.” It should respond point by point to the insurer’s cited criteria and connect the clinical facts to the requested treatment.
Depending on the denial, useful supporting material can include relevant chart notes, diagnostic results, imaging or laboratory reports, treatment history, prior treatment response or failure, and the plan criteria quoted in the notice. Include only records that help the reviewer understand the decision; organize them with page numbers or labels so the key evidence is easy to find.
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What to put in your written appeal
- Identify the coverage and claim: Include your name, member and group numbers, the patient’s relationship to the policyholder, the service, dates and claim or authorization number.
- State the requested outcome: Ask the plan to overturn the denial and approve or pay for the specified service.
- Answer each reason: Quote or accurately summarize the denial rationale, then explain why the cited criterion is met or why it does not fit your circumstances.
- Attach clinical support: Add the clinician’s letter and the relevant records, test results and prior-treatment history.
- Request the correct review level: If delay creates a serious health risk, clearly request an expedited appeal and explain the risk.
- Confirm delivery: Submit through the prescribed channel and retain the confirmation, fax receipt, portal screen or certified-mail record.
For an employer plan governed by ERISA, the Department of Labor says claimants may request relevant plan documents and records without charge, including information the plan used in making its decision. Ask for those materials if you need to see the evidence or guidelines behind the denial. When the decision involves medical judgment, the claims standards described by the Department require review by a qualified health professional.
3. Ask for expedited review when delay could cause serious harm
Explain urgency in medical terms. HealthCare.gov describes urgent circumstances as those in which the ordinary timetable could seriously jeopardize life or the ability to regain maximum function. Ask your clinician to document why waiting for a standard decision poses that risk and why the requested treatment is time-sensitive.
Depending on your eligibility and plan, an urgent external review may be available before the internal process is complete. Under the general HealthCare.gov process, an expedited external-review decision is made as soon as possible and no later than 72 hours after the request. Your plan or state process may use different rules, so follow the instructions on the notice.
4. If the internal appeal fails, check for independent external review
Read the final denial carefully. Medical-judgment denials, including many medical-necessity decisions, may qualify for external review by an independent review organization. HealthCare.gov explains the purpose plainly: “External review means that the insurance company no longer gets the final say over whether to pay a claim.” Under the federal process it describes, the insurer must accept the external reviewer’s decision.
General federal guidance, not a universal deadline
HealthCare.gov gives a general four-month window to request standard external review and a standard decision limit of 45 days. Expedited external reviews are decided in 72 hours or less when the situation qualifies. These are general consumer-guidance figures, not deadlines that apply identically to every policy, state or government program. Use the final denial notice and current plan instructions to determine your actual deadline and submission route.
Keep the complete internal-appeal file with the external-review request. Include the final denial, your original appeal, the clinician’s response, relevant records, and a short explanation of why the denial should be overturned. An external reviewer evaluates the plan’s decision under the applicable benefit terms and medical standards; approval is not guaranteed simply because you request review.
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5. Follow the route for your type of coverage
Coverage category changes the administrator, forms and time limits. Do not apply a Marketplace or employer-plan deadline to a government program without checking its rules.
| Coverage | Where to start | Important qualification |
|---|---|---|
| Individual or Marketplace policy | Use the appeal instructions in the denial notice and plan documents; HealthCare.gov describes many internal appeals as due within 180 days after receiving the notice. | The 180-day period is common guidance, not a promise that every policy uses the same deadline. Check the notice. |
| Employer-sponsored ERISA plan | Follow the plan’s claims procedure and Summary Plan Description. Request relevant records without charge if needed. | The Department of Labor says claimants have at least 180 days to appeal. The final decision may describe further appeal, external-review or judicial-review rights. |
| Original Medicare | Use Medicare’s appeal steps for the specific service and decision. | Medicare.gov says appeal procedures vary by coverage type; use the notice for the applicable level and deadline. |
| Medicare Advantage | Start with the plan’s organization-determination and reconsideration instructions. | CMS describes a 65-calendar-day filing window from the organization-determination notice and separate standard and expedited processing periods. CMS reported guidance updated effective July 6, 2026; verify the current official instructions before filing. |
| Medicare prescription drug plan | Use the plan’s coverage-determination and redetermination process. | Deadlines and review levels differ from Original Medicare and Medicare Advantage. |
| Medicaid or CHIP | Follow the state agency or managed-care plan notice. | There is no single national filing route or medical-necessity deadline established for every state. Do not substitute Marketplace timelines. |
For any employer plan, locate the Summary Plan Description and the plan’s claims administrator. For Medicare, identify whether the notice concerns Original Medicare, Medicare Advantage or a drug plan before selecting a form. For Medicaid or CHIP, contact the state agency or plan listed on the notice.
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Create one physical or digital folder for the denial. An ordinary document folder or optional records organizer is enough; buying a product is not necessary to appeal.
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- Save the denial letter, EOBs, plan provisions and medical policy cited.
- Keep your appeal, every attachment and proof of submission.
- Record calls with date, time, department, representative’s name or identification number and promised follow-up.
- Store clinician letters, chart notes, test results and external-review correspondence in the order submitted.
- Track every deadline on a calendar and leave time for mailing or portal problems.
Send copies, not irreplaceable originals. If the insurer says it did not receive an attachment, resend it with the original submission confirmation and ask for written acknowledgment.
7. Get free help when the process stalls
HealthCare.gov identifies state Consumer Assistance Programs and Departments of Insurance as possible sources of help with internal appeals and external review. They may explain which rules apply to a state-regulated policy and where to file a complaint or review request.
Medicare beneficiaries can receive free, local counseling through the State Health Insurance Assistance Program (SHIP). A SHIP counselor can help identify the correct Medicare appeal level and deadline, but the notice and current Medicare instructions remain authoritative.
For an ERISA plan, the Department of Labor’s employee-benefits assistance resources can explain claims-procedure rights. Ask the plan administrator for the Summary Plan Description and the claims procedure if you cannot locate them.
8. Common mistakes that weaken an appeal
- Missing the deadline: Start from the date on the written notice and verify whether the plan counts calendar or business days.
- Arguing only that the treatment is expensive or preferred: The reviewer needs the clinical facts tied to the stated medical-necessity criteria.
- Ignoring other denial reasons: A medical-necessity appeal will not fix a separate network, coding, benefit or authorization problem unless you address it too.
- Sending a doctor’s note with no explanation: Ask the clinician to answer the insurer’s specific rationale and identify the supporting records.
- Assuming a phone promise is an approval: Require the decision and any authorization in writing.
- Using the wrong government route: Medicare, Medicaid, CHIP and employer plans have different procedures.
- Failing to request urgency: If delay threatens health, state that plainly and provide clinician documentation rather than waiting for the standard timetable.
9. A practical filing checklist
- Read every page of the denial and EOB.
- Write down the service, dates, reason, cited criteria and deadline.
- Ask for the records and policy criteria used in the decision.
- Confirm whether coding, network, benefit or authorization issues also appear.
- Ask the treating clinician for a criterion-specific letter and relevant records.
- Complete the required form and attach a clearly labeled written appeal.
- Request expedited review if the medical situation is urgent.
- Submit through the specified portal, fax, mail or other channel and save proof.
- Calendar the expected response date and follow up in writing if it passes.
- If the final denial allows external review, file by the notice’s deadline and include the full record.
There is no reliable universal success rate for medical-necessity appeals. The strongest general strategy is procedural: act promptly, answer the actual rationale with patient-specific clinical evidence, use the review route for your coverage, and preserve proof of every step.
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