A complaint to your state Department of Insurance (DOI) asks a regulator to review an unfair denial or a process violation by your insurer. It runs alongside your appeal, not instead of it, and it can prompt the insurer to take a closer look. The right regulator depends on your plan type, so confirm that first. The complaint below is addressed to a state DOI; the notes and “How to send it” section explain the other paths. Send it after you have documented the problem and, where possible, attempted the plan’s own appeal.
Before you appeal
- Your denial letter(s) and EOB, and any final internal denial.
- The appeal(s) you filed and the plan’s responses, with dates.
- A short timeline of what happened: dates of service, denials, appeals, calls, and deadlines.
- What the plan did wrong: an unfair denial, a missed deadline, no response, or a process violation.
- Your member ID, group number, claim number, the plan name, and the insurer’s contact.
The letter
[Your full name]
[Your address]
[City, State ZIP]
[Phone] | [Email]
[Date]
[State Department of Insurance - Consumer Services Division]
[Address / official complaint portal]
Re: Complaint against [insurer name] - denied health insurance claim
Member: [Name] Member ID: [number] Group #: [number]
Plan name: [name] Claim number: [number]
Date(s) of service: [dates] Denial date(s): [dates]
Denial reason/code: [as stated on the denial letter/EOB]
To the Consumer Services Division:
I am filing a complaint against [insurer name] regarding the denial described
above. I believe the denial or the handling of my claim was improper for the
following reason(s):
[State plainly what went wrong. For example: the service was covered and
medically necessary, but the plan denied it; the plan missed its required
decision deadline; the plan did not respond to my appeal; the plan failed to
provide the criteria it used; or the denial conflicts with my plan documents.]
Timeline of events:
- [Date]: [what happened]
- [Date]: [what happened]
- [Date]: [what happened]
I have already [filed an internal appeal on [date] / received a final denial on
[date] / been unable to get a response]. I ask the Department to review this
matter and help resolve it.
Enclosed in support:
- Denial letter(s) and EOB
- My appeal(s) and the plan's responses
- Any correspondence and notes from calls
Please confirm receipt and let me know what information you need from me.
Thank you,
[Your signature]
[Your printed name]
How to send it
Submit through your DOI’s official consumer-complaint channel (most states have an online portal as well as a mailing address) and keep a dated copy of everything. There is generally no hard “deadline” to complain, but file while your appeal is still active so the regulator can act, and keep pursuing your appeal and any external review in parallel. If your situation is urgent, say so and reference any expedited request you have made.
Notes. Pick the regulator by plan type. If your plan is fully-insured or an ACA Marketplace plan, complain to your state Department of Insurance. If you have a self-funded employer (ERISA) plan, the state DOI usually cannot regulate it — contact the U.S. Department of Labor / Employee Benefits Security Administration (EBSA) instead. For Medicare, use 1-800-MEDICARE or your plan’s grievance process; Medicare Advantage and Part D have their own complaint and appeal tracks. A complaint supplements your appeal rights; it does not replace them. See which appeal process applies to confirm your plan type, and consider an external (independent) review and the internal appeal letter as your primary appeal steps. This is general information, not legal, medical, or insurance advice.