How to submit your appeal

1. Read your letter first

Your Rebuttal letter identifies the regulatory basis for your appeal and states what your insurer is legally required to do. The citations are real federal regulations — not suggestions. Your insurer's legal and claims review teams recognize them and are obligated to respond to them specifically.

Read the letter in full before sending it. Confirm that the denial reason matches your situation and that the plan type (ERISA or ACA) is correct. If anything is wrong, recover your letter and start over with a fresh upload.

2. Gather supporting documents

Your appeal letter establishes the legal basis. Supporting documents establish the facts. Not all of these apply to every denial — use the type of denial in your letter as a guide.

• Explanation of Benefits (EOB)

  From your insurer's online member portal, or by calling the member services number on your insurance card.

• Summary of Benefits and Coverage (SBC)

  From your employer's HR department or your insurer's website.

• Doctor's letter of medical necessity

  Request directly from the ordering physician's office. Ask specifically for a "letter of medical necessity for insurance appeal."

• Clinical notes and records

  From your provider — the relevant visit notes supporting why the service was needed.

• Prior authorization record

  If you obtained prior authorization, include the confirmation number and any written correspondence.

• Itemized bill

  From your provider's billing department — a line-by-line breakdown of charges with procedure codes.

3. Find your insurer's appeal address

The appeal mailing address is on your denial letter — look for the section titled “How to appeal” or “Your appeal rights.” If you cannot find it, call the member services number on your insurance card and ask specifically: “What is the mailing address for formal written appeals?”

4. Submit your appeal

You have two submission options:

Deadlines: Most ERISA plans allow 180 days from the denial date. ACA plans vary — check your denial letter. Do not miss the deadline. Insurers can reject late appeals on procedural grounds regardless of merit.

5. What happens after you submit

Federal law sets minimum response timelines for ERISA plans:

• Non-urgent claims60 days to respond
• Urgent or pre-service claims72 hours
• Concurrent care decisions24 hours

The insurer must provide a written response explaining their decision. If they uphold the denial, they must cite the specific plan provisions and clinical criteria they relied on.

6. If your internal appeal is denied

You have additional options:

• External review (ACA plans)

  Under ACA-governed plans, you have the right to an independent external review. The external reviewer's decision is binding on the insurer.

• External review (ERISA plans)

  External review rights for employer plans depend on your state and plan type. Some self-funded employer plans are exempt from state external review mandates.

• State insurance commissioner

  File a complaint if you believe the insurer violated state or federal law. Most states have an online complaint portal.

• Department of Labor (ERISA plans)

  File a complaint with the Employee Benefits Security Administration at dol.gov/agencies/ebsa for ERISA plan violations.

Insurance appeals succeed most often when they are specific, documented, and persistent. Your Rebuttal letter establishes the federal legal basis. The supporting documents establish the facts. Together, they give the insurer something they must respond to — not something they can dismiss.