Last reviewed: September 30, 2026.
Direct answer: First, read the Explanation of Benefits or Integrated Denial Notice and note the deadline. Confirm the service date, codes, provider, and whether prior authorization was required. Ask the provider to correct billing errors. Then file the plan's internal appeal in writing. If the plan upholds the denial, many ACA and employer plans allow an external review. Medicare uses its own appeals steps. Keep copies of everything you send.
| Step | Deadline for you | Plan decision time |
|---|---|---|
| Internal appeal (Marketplace or job-based plan) | Within 180 days of the denial notice | 30 days for services not yet received; 60 days for services already received |
| Urgent care claim | As soon as possible; you can request external review at the same time | 72 hours or less |
| External review | Within 4 months of the final internal denial | 45 days (standard); 72 hours (expedited) |
Medicare uses its own levels and deadlines, which are printed on your notice.
What should I do in the first review of the notice?
Match the claim number to the provider bill. Check whether the denial is for eligibility, medical necessity, coding, out-of-network status, or missing prior authorization. Call the provider billing office if the code or modifier looks wrong. An appeal that repeats an incorrect code will not fix a billing error. This first-pass checklist is the angle of this page. For a longer walkthrough already on the site, use Insurance claim denied: a step-by-step review process.
How does an internal appeal differ from an external review?
An internal appeal asks the plan to reconsider using its own process. HealthCare.gov describes appeal rights for Marketplace coverage on its review and appeal rights page. If the plan still denies a claim after the internal process, many plans must offer an independent external review. Employer plans follow ERISA appeal rules described by the Department of Labor. Deadlines are in the notice; missing them can end the process.
Is a Medicare denial the same process?
No. Medicare Advantage, Part D, and Original Medicare have their own appeal levels. Start with the plan or Medicare Administrative Contractor instructions on the notice and with Medicare.gov file an appeal. Coverage varies by plan. Do not send a Marketplace appeal form to a Medicare plan.
When is an agent useful, and when is the provider required?
The provider often holds the clinical notes the plan asked for. The member holds the plan documents and the denial notice. David Huff, a licensed Florida health agent, can help you read the notice and the plan rule. He cannot overturn a denial and does not practice medicine. If the bill is a hospital statement, see how to review a hospital bill.
What if the denial is for prior authorization that was never requested?
Ask the provider whether they submitted prior authorization and whether they will request a retrospective authorization. File the internal appeal in parallel if the deadline is close. One path does not replace the other.
If the service has not happened yet, a pre-service denial can have a faster timeline than a post-service claim denial. The notice should say which process applies. Expedited appeals exist for urgent care; ordinary delays are not urgency by themselves.
Keep a simple log: date mailed, fax confirmation, and names of representatives. Appeals fail as often from missing paperwork as from clinical disagreement. A licensed Florida health agent can help you read the rule the plan cited.
Common questions
Should I ignore a denial if I think the provider will resubmit?
Do not ignore the appeal deadline while you wait. Track both the provider correction and the plan deadline so neither expires.
Is an external review the first step?
Usually no. Most processes require the plan's internal appeal first, unless the notice describes an expedited path for urgent care.
How long do I have to appeal a health insurance denial?
For Marketplace and most job-based plans, you generally have 180 days from the denial notice to file an internal appeal, and 4 months after a final internal denial to request an external review. Your notice lists the exact deadline.
What to do next
Put the appeal deadline on a calendar, request records from the provider, and send the internal appeal as the notice instructs. Call (863) 640-3102 or use Get Help if you want a second set of eyes on the paperwork.
Use the denial notice as the instruction sheet
Bring the Explanation of Benefits, the provider bill, and the plan document. An agent review is not a medical appeal filed for you unless you ask and the plan allows authorized representation.
Request a Plan Review Call (863) 640-3102Sources
Appeal rights and deadlines depend on the plan type and the notice. This page is educational and does not file appeals, practice law, or promise a reversal.