Receiving a health insurance claim denial can be frustrating, especially when you believe a treatment, procedure, medication, or medical service should have been covered. A denial does not always mean the matter is over. Depending on your health plan and the reason for the denial, you may have the right to ask the insurer to reconsider its decision and, in many cases, request an independent external review.
The key is to act quickly, understand why the claim was denied, gather supporting evidence, and follow your plan’s appeal procedures carefully. This guide explains how the process generally works in the United States and how to build a stronger appeal.
Why Do Health Insurance Companies Deny Claims?
Health insurance claims can be denied for many different reasons. Common examples include:
- The service was considered not medically necessary.
- The treatment was considered experimental or investigational.
- The provider was outside the plan’s network.
- Prior authorization was required but not obtained.
- The service was not included in the plan’s benefits.
- The insurer says the documentation was incomplete.
- The claim was submitted incorrectly.
- The insurer believes the treatment does not meet the plan’s coverage requirements.
Your denial notice should explain the reason for the decision and provide information about your appeal rights.
Step 1: Read the Denial Letter Carefully
Before filing an appeal, read the denial letter or Explanation of Benefits (EOB) carefully.
Look for:
- The exact reason for the denial
- The claim number
- The date of the decision
- The service or treatment involved
- The policy or plan provision cited by the insurer
- The deadline for submitting an appeal
- Instructions for filing an internal appeal
- Information about external review
Do not rely only on a phone conversation with the insurer. Keep written records of important communications.
Step 2: Find Out What Your Insurance Policy Covers
Review your health plan documents, Summary of Benefits and Coverage, policy booklet, or Summary Plan Description if your insurance is employer-sponsored.
Look specifically for language related to:
- Medical necessity
- Prior authorization
- Out-of-network services
- Exclusions
- Prescription drug coverage
- Emergency care
- Specialist treatment
- Experimental or investigational treatments
Your goal is to determine whether the denied service is actually covered and what conditions must be met.
Step 3: Ask the Insurance Company for More Information
If the denial is unclear, contact your insurer and ask questions.
You can ask:
“What specific policy provision was used to deny this claim?”
You can also ask:
“What documentation or information would be required for this claim to be reconsidered?”
Write down the date and time of the call, the representative’s name or identification number if available, and what you were told.
Step 4: Talk to Your Doctor or Healthcare Provider
Your healthcare provider can be an important part of an appeal.
Ask your doctor whether they can provide:
- A letter of medical necessity
- Relevant medical records
- Test results
- Treatment history
- Clinical notes
- Evidence explaining why the treatment is appropriate
- Documentation showing why alternative treatments may not be suitable
A clear medical explanation can be particularly important when an insurer denies a service based on medical necessity.
Step 5: Gather Your Evidence
Create an organized appeal file.
Include copies of:
- Denial letter
- Explanation of Benefits
- Insurance policy provisions
- Medical records relevant to the claim
- Doctor’s letter
- Test results
- Treatment history
- Bills and invoices
- Prior authorization documents
- Correspondence with the insurer
Keep the original documents for your records and submit copies when possible. HealthCare.gov specifically recommends keeping copies of documents and notes from conversations related to an appeal.
Step 6: Write a Strong Appeal Letter
Your appeal letter should be factual, organized, and specific.
Include:
Your Information
Provide your:
- Full name
- Insurance ID number
- Claim number
- Date of service
- Contact information
Explain the Problem
Clearly state that you are appealing the denial.
For example:
“I am requesting an internal appeal of the denial of coverage for [medical service/treatment] associated with claim number [claim number].”
Explain Why the Denial Should Be Reconsidered
Reference the relevant section of your insurance policy and explain why the treatment or service meets the plan’s requirements.
If your doctor believes the treatment is medically necessary, explain that clearly and include supporting documentation.
Request a Specific Outcome
Tell the insurer exactly what you want:
- Reconsideration of the denial
- Payment of the claim
- Authorization for the treatment
- Correction of an administrative error
A focused request is easier to evaluate than a general complaint.
Step 7: Submit the Internal Appeal on Time
For many U.S. health plans covered by federal appeal protections, consumers have an internal appeal process. HealthCare.gov states that an internal appeal generally must be filed within 180 days of receiving the denial notice, although the exact rules can depend on the plan and applicable law.
Follow the instructions in your denial notice rather than assuming one deadline applies to every insurance plan.
Submit the appeal using the required method, such as:
- Online portal
- Fax
- Email, when permitted
- Phone for certain urgent situations
Keep proof that you submitted the appeal.
Step 8: Ask for an Expedited Appeal if the Situation Is Urgent
Some medical situations require a faster decision.
If waiting for the standard appeal process could seriously jeopardize your life or ability to regain maximum function, you may qualify for an expedited appeal. Federal guidance provides accelerated procedures for qualifying urgent cases.
Ask your healthcare provider and insurance company whether your situation qualifies.
Step 9: Consider an External Review
If the insurer upholds its denial after an internal appeal, you may have the right to request an external review by an independent third party.
External review is different from an internal appeal because the decision is made by an organization or reviewer independent of the insurance company. Depending on the applicable process, an external review may overturn the insurer’s decision.
Your final denial notice should explain whether you qualify and how to request external review.
Important: Check Your Deadline
External-review deadlines vary by the applicable process and plan. HealthCare.gov currently states that some federal external-review requests must be submitted within four months after receiving the final determination, while other plan or state procedures may use different deadlines. Always follow the deadline stated in your notice.
How to Make Your Appeal Stronger
There is no guaranteed way to win an insurance appeal, but you can improve your chances by making your case well documented.
Be Specific
Instead of writing:
“The insurance company is wrong.”
Explain exactly why the decision conflicts with the policy or the medical evidence.
Use Medical Evidence
If the denial involves medical necessity, supporting documentation from your healthcare provider can be especially important.
Address the Exact Reason for Denial
Do not send a generic letter. Respond directly to the reason the insurer gave for denying the claim.
Follow the Instructions
A strong argument can still face problems if required forms, documents, or deadlines are missed.
Keep a Paper Trail
Save:
- Letters
- Emails
- EOBs
- Medical records
- Appeal forms
- Submission confirmations
- Phone-call notes
Good documentation can make it easier to prove what was submitted and when.
What If the Insurance Company Still Says No?
If your internal appeal is denied, do not automatically assume you have no options.
Depending on your plan and situation, you may be able to:
- Request an external review
- Contact your state’s Department of Insurance
- Contact a Consumer Assistance Program
- Ask your employer’s benefits department for help
- Work with a patient advocate
- Ask your healthcare provider to assist with the appeal
CMS notes that Consumer Assistance Programs may be able to help consumers with appeals, while patient advocates may also assist with medical billing disputes.
Tips for Avoiding Future Claim Denials
Prevention can be easier than appealing a denial.
Before receiving expensive or specialized treatment:
- Confirm that the provider is in-network.
- Check whether prior authorization is required.
- Ask whether the service is covered.
- Confirm any referral requirements.
- Keep copies of authorization letters.
- Ask your provider’s billing department to verify insurance information.
- Review your Explanation of Benefits after treatment.
Remember that a provider saying a service is “covered” does not necessarily guarantee that the insurer will pay the claim. Coverage can depend on the specific terms of your plan.
Frequently Asked Questions
Can I appeal a denied health insurance claim?
In many situations, yes. Health insurance consumers generally have an internal appeal right, and eligible claims may also qualify for external review. The exact process depends on your plan, type of coverage, state, and reason for denial.
How long does an insurance appeal take?
Timeframes vary. For many federally regulated plans, internal appeals generally must be decided within 30 days for care that has not yet been received and within 60 days for services already received. Urgent cases can have much shorter timelines.
Can my doctor appeal a claim for me?
In some circumstances, you can authorize a healthcare provider or another representative to act on your behalf. HealthCare.gov also notes that a representative may file an external review in eligible cases.
What happens if I win an external review?
If an eligible external reviewer overturns the insurer’s decision, the plan generally must accept the reviewer’s decision under the applicable external-review rules.
Conclusion
A denied health insurance claim is not necessarily the end of the process. Understanding the reason for the denial, reviewing your policy, gathering strong documentation, working with your healthcare provider, and meeting every deadline can give your appeal the best possible foundation.
If the internal appeal does not resolve the dispute, an external review may provide another opportunity for an independent decision. Because insurance rules vary by plan and location, always read your denial notice carefully and use the appeal instructions provided by your insurer or applicable regulator.
Disclaimer
This article is provided for general educational and informational purposes only and does not constitute legal, insurance, financial, or medical advice. Health insurance appeal rights, deadlines, procedures, and external-review eligibility can vary depending on the type of plan, state, employer, insurer, and applicable federal law.
For a specific denied claim, review your plan documents and denial notice and consider contacting your insurer, state insurance regulator, Consumer Assistance Program, benefits administrator, qualified patient advocate, or attorney when appropriate.
Do not rely solely on this article when making decisions about a specific insurance claim, and do not miss an appeal deadline while seeking additional information.