A health-insurance denial can be frustrating, but it does not always mean the issue is over. The denial may involve coverage rules, prior authorization, coding, missing documentation, network status, medical-necessity criteria, or another administrative issue. Your first job is to identify exactly why the claim was denied.
HealthCare.gov explains that, for plans subject to federal appeal protections, consumers can ask an insurer to reconsider certain coverage decisions and may have access to internal appeal and independent external review processes.
Step 1: Read the denial notice, not just the bill
Look for:
- Claim number
- Date of service
- Provider and service
- Amount billed
- Amount allowed or denied
- Denial reason or code
- Appeal instructions
- Appeal deadline
An Explanation of Benefits (EOB) is not always a bill. Compare it with any bill from the provider.
Step 2: Translate the denial reason into plain English
Call the insurer and ask:
“Please explain the denial reason in plain language and tell me exactly what information or requirement caused the claim not to be paid.”
Then ask what would be needed to reconsider it.
Common categories can include:
- Service not covered
- Prior authorization missing
- Out-of-network provider
- Incorrect or incomplete billing information
- Insufficient medical documentation
- Medical-necessity criteria not met
- Duplicate claim
- Coordination-of-benefits issue
Step 3: Call the provider’s billing office
Give them the denial reason and ask whether they can see an obvious fix. Sometimes the provider needs to correct coding, resubmit a claim, send records, document prior authorization, or provide additional clinical information.
Ask:
- Did you receive the same denial?
- Was the claim submitted correctly?
- Was authorization obtained?
- Can the office submit additional documentation?
- Should I appeal, or is the office already correcting/resubmitting the claim?
Step 4: Protect the deadline even while others are working on it
Do not assume a billing-office correction automatically preserves your appeal rights. Record the appeal deadline from the denial notice and ask the insurer how a corrected claim affects that deadline.
If the deadline is approaching, follow the plan’s written instructions rather than relying on a verbal promise that “someone is looking into it.”
Step 5: Build an appeal file
Keep one folder — paper or digital — containing:
- Denial notice
- Explanation of Benefits
- Provider bill
- Relevant policy or plan language
- Prior-authorization documents
- Medical records or letters supporting the service, when relevant
- Copies of your appeal
- Portal messages
- Notes from phone calls
Step 6: Track every conversation
| Date | Organization / person | Reference number | What they said / next step |
|---|---|---|---|
Ask for a call reference number whenever the insurer provides one.
Step 7: Make the appeal specific
A strong appeal addresses the stated reason for denial. It may include:
- The claim and service being appealed
- The denial reason
- Why you believe the decision should be reconsidered
- The plan language or documentation supporting your position
- Relevant records or a clinician letter when appropriate
- The resolution you are requesting
Follow the plan’s required submission method and keep proof of submission.
Step 8: Ask whether external review is available
HealthCare.gov describes two levels that can apply to certain health-plan decisions: an internal appeal handled by the insurance company and an external review by an independent third party. The exact rights, deadlines, and eligibility depend on the plan and type of denial.
The denial notice should explain the process that applies to your plan.
Check for No Surprises Act protections when relevant
Some unexpected out-of-network bills are restricted by federal law. CMS maintains current information about protections for many emergency services and certain out-of-network services received at in-network facilities. If the denial or bill involves unexpected out-of-network charges, review those rules or contact the CMS No Surprises Help Desk.
Where else to ask for help
Depending on the type of coverage and problem, help may be available from:
- Your employer’s benefits department
- The insurer’s member-services or appeals department
- Your state department of insurance
- A hospital or clinic patient advocate
- CMS or HealthCare.gov resources
Coverage through Medicare, Medicaid, employer plans, Marketplace plans, and other programs can have different procedures, so use the appeal instructions for your actual plan.