Denial next-step guide

Choose the reason that is closest to what your notice or EOB says. You will see what it may mean, who usually acts first, and where to go next.

Is the care still needed, and could waiting seriously harm your health?

Yes, it may be urgent

Ask your plan for an urgent (expedited) review now. Your clinician can help. In many plans you can ask for an urgent external review at the same time.

No, or the care already happened: What reason does your notice give? ↓

What reason does your notice give?

Coding error, missing information, or billing mistake

What it may mean

The claim may have had a wrong code, missing detail, or typo. The plan may not have reviewed whether the care is covered.

Who usually acts first

The provider's billing office

Next steps

  1. Call the billing office and read them the denial reason.
  2. Ask them to correct and resubmit the claim.
  3. Ask them to hold the bill while it is fixed.

Learn more

Coverage not active, or wrong plan or ID

What it may mean

The plan could not match you to active coverage on the date of care.

Who usually acts first

You and the provider

Next steps

  1. Check that your coverage was active on that date.
  2. Give the provider your current card details.
  3. Ask the provider to resubmit to the right plan.

Learn more

Duplicate claim

What it may mean

The plan thinks it already received this claim. It may have been paid or processed under another claim.

Who usually acts first

The provider's billing office

Next steps

  1. Look for another EOB for the same date.
  2. Ask the provider whether the claim was sent twice.
  3. Pay only the amount on the correct EOB.

Learn more

Filed too late

What it may mean

The provider sent the claim after the plan's deadline.

Who usually acts first

The provider's billing office

Next steps

  1. Ask the provider why the claim was late.
  2. Ask whether you are responsible for the bill under their contract with the plan.
  3. Keep notes of the answer.

Learn more

Out of network

What it may mean

The provider or facility does not have a contract with your plan.

Who usually acts first

You, with help from the plan

Next steps

  1. Check whether it was an emergency or care at an in-network facility; surprise-billing protections may apply.
  2. Ask the plan whether an exception or in-network rate applies.
  3. If not, consider an appeal and use the appeal checklist.

Learn more

No prior authorization

What it may mean

The plan required approval before the care and did not find one.

Who usually acts first

The provider, then you

Next steps

  1. Ask the provider whether they requested approval.
  2. Ask if the plan allows a late (retroactive) request.
  3. If not, consider an appeal with your clinician's help.

Learn more

Not medically necessary

What it may mean

The plan reviewed the care and decided it did not meet its rules for medical need.

Who usually acts first

You and your clinician

Next steps

  1. Ask the plan for the rules or criteria it used.
  2. Ask your clinician for a letter and records that address those rules.
  3. File an appeal before the deadline on your notice.

Learn more

Not covered, excluded, or experimental

What it may mean

The plan says your benefits do not include this service.

Who usually acts first

You

Next steps

  1. Read the plan document section on this service.
  2. Ask your clinician whether a covered alternative exists or if the description was wrong.
  3. If you believe it is covered, file an appeal and quote the plan language.

Learn more

I am not sure, or the reason is unclear

What it may mean

Denial notices can be hard to read. You have a right to know why.

Who usually acts first

You, by asking the plan

Next steps

  1. Call the number on your notice and ask the plan to explain the reason in plain words.
  2. Ask whether the provider can fix it, or whether you need to appeal.
  3. Write down the deadline.

Learn more

Your notice has the deadlines and instructions that apply to you. This guide is general and does not predict a result.

Where can I go for help?

Free help is often close by: the member services number on your insurance card, the billing office for your provider, your state insurance department, and nonprofit patient advocates.

Who can help, and what each one does

This is general education. For decisions about your own plan, taxes, or legal rights, check your plan documents or a qualified professional.

Sources

  1. Filing a Claim for Your Health Benefits U.S. Department of Labor, Employee Benefits Security Administration. Applies to: current page. Published or updated: Unknown. Retrieved: October 14, 2026.
  2. Internal appeals HealthCare.gov (Centers for Medicare & Medicaid Services). Applies to: current page. Published or updated: Unknown. Retrieved: October 14, 2026.
  3. External review HealthCare.gov (Centers for Medicare & Medicaid Services). Applies to: current page. Published or updated: Unknown. Retrieved: .
  4. Interoperability and Prior Authorization Final Rule (CMS-0057-F) Centers for Medicare & Medicaid Services. Applies to: 2026 onward. Published or updated: Unknown. Retrieved: .