First, identify what was denied
Find the explanation of benefits, denial letter or authorization notice. Record the service date, claim number, provider, amount, reason code and appeal instructions. An EOB is generally a processing statement, not a bill, so compare it with any provider invoice.
Common issues include incorrect member information, coding errors, missing authorization, network status, benefit exclusions or a medical-necessity determination. These require different responses. A general statement that the bill is unaffordable may not address the plan's stated reason.
HealthCare.gov's appeal overview distinguishes internal review from independent external review. It also separates insurance claim appeals from Marketplace eligibility appeals, which follow a different process.
Confirm which rules apply to your plan
Individual insurance, employer plans, Medicare and Medicaid do not all use the same appeal system. Employer coverage may also involve different oversight depending on how the plan is funded.
Use the instructions in the notice and plan documents. Ask the administrator which appeal rules apply, where to submit and whether a representative authorization is required for someone to act for you.
This guide focuses on general health-plan claim and coverage appeals described by HealthCare.gov. It does not replace Medicare, Medicaid or another program's specific notice. Do not copy a deadline from a different system.
Separate correction from formal appeal
If the issue is a misspelled identifier or incorrect billing code, ask the provider and plan whether a corrected claim is appropriate. Record who will submit it and when.
At the same time, preserve the appeal deadline. A promise that a billing office is “working on it” may not pause the clock. Ask for written confirmation if a deadline is extended or a different process applies.
If the plan has made a coverage or medical-necessity decision, ask how to file a formal appeal even while the provider supplies additional information. The goal is to address the reason through the correct channel.
Build an appeal file
| Document | Purpose |
|---|---|
| Denial and EOB | Identifies the decision and reason |
| Plan language | Shows the benefit and relevant conditions |
| Claim and service records | Establishes what was requested or provided |
| Clinician's supporting statement | Addresses clinical criteria when relevant |
| Prior authorization or network confirmation | Documents earlier communications |
| Appeal submission and proof | Establishes what was sent and when |
| Call log | Tracks names, dates, reference numbers and next steps |
Keep originals where practical and submit copies through the required secure route. Do not send more sensitive medical information than the review requires.
Write to the stated reason
Begin with the claim and decision you are appealing. State the outcome requested, such as reconsideration of coverage or correction of the patient responsibility. Then connect each supporting document to the specific reason for denial.
For a hypothetical authorization dispute, the useful evidence might be the authorization number, service dates and approved procedure description. For a medical-necessity dispute, the treating clinician may need to explain how the requested service meets the plan's criteria. Those are different arguments.
Keep the letter factual and organized. You do not need dramatic language or unsupported accusations to make it clear. Ask for the relevant criteria or records used in the decision if they are not provided.
Track internal appeal deadlines
HealthCare.gov's internal-appeal guidance describes a general 180-day filing period after a claim denial for the plans and process it covers. Your notice should explain the applicable deadline and submission method; other programs can differ.
Submit early enough to correct a missing form or delivery problem. Keep portal confirmation, tracking information or another receipt. If a representative submits for you, obtain a copy and proof of submission rather than assuming it happened.
Ask when a decision is due and what to do if none arrives. The review timeline depends on the kind of request, including whether care has already occurred or is urgent.
Ask about expedited review when appropriate
If a standard timeline could seriously jeopardize health or the ability to regain function, ask the treating clinician and plan about urgent or expedited review. Some situations permit internal and external processes to proceed together.
Do not delay emergency care to complete routine paperwork. This article explains insurance administration, not whether a medical situation is urgent or what treatment to choose.
Get the expedited request requirements, submission route and confirmation. A phone call asking for help is not always the same as a completed expedited appeal.
External review may be the next step
An eligible external review sends the decision to an independent reviewer rather than leaving the insurer as the final decision-maker. Not every dispute qualifies in the same way. Medical judgment, experimental-treatment determinations and certain coverage rescissions are examples described in HealthCare.gov's external-review guidance.
The final internal denial should explain where to request review and the deadline. State and federal processes can differ. Follow that notice and ask the appropriate consumer-assistance program for help if the route is unclear.
Do not assume filing a regulator complaint automatically substitutes for an appeal or pauses its deadline. Use each process for its intended purpose.
Manage billing while the dispute is pending
Tell the provider's billing office that an appeal or correction is in progress and ask whether collection activity can be held. Obtain any agreement in writing. An appeal does not automatically cancel a bill or guarantee a hold.
Compare the final decision with the updated EOB and provider statement. If the appeal succeeds, verify that adjustments were applied. If it does not, review the remaining appeal or legal options and deadlines before deciding the next step.
For future plan selection, our network guide and plan-comparison checklist can help identify recurring access issues. A denial is still evaluated under the plan in force for the relevant service.
Frequently asked questions
Is every denial worth appealing?
Start by checking the reason and evidence. A clear error or disagreement supported by plan language or clinical information may warrant review. No appeal outcome is guaranteed.
Can my doctor appeal for me?
Often a provider can help, but the plan may require authorization or a particular process. Confirm who is responsible and retain a copy of the submission.
Does an appeal stop the bill from going to collections?
Not automatically. Contact the provider, request a hold where available and document the response while preserving appeal rights.
Is this how I appeal a Marketplace subsidy decision?
No. Marketplace eligibility and financial-assistance decisions have their own appeal process. Use the instructions in that eligibility notice rather than the claim-appeal timeline here.
Sources and methodology
This article uses public policy guidance and official product information, checked October 30, 2026. Insurance coverage and availability depend on the issued contract, state and personal eligibility. We did not apply for coverage, test a carrier or evaluate an actual claim for this article.