Complaints to Regulators

What this is

This guide helps patients and advocates understand when to contact a government agency about a health insurance or health care problem. Those agencies include a state insurance department, the U.S. Department of Labor, the federal Medicare and Medicaid agency (CMS), a state Medicaid office, or a state attorney general.

A complaint to a regulator is not the same as an appeal. An appeal asks the health plan to change a specific decision—such as paying for a surgery or a medication. A complaint asks an agency to look at whether someone followed the rules: Was the patient given clear information? Did the company miss a deadline? Did an agent enroll someone without permission?

You do not always need both. When you want the plan to change a denial, the appeal is usually the main step. A regulator complaint is an extra tool when the process breaks down—missed deadlines, conflicting answers, missing paperwork, or conduct that looks unfair or deceptive. Protect appeal deadlines first; add a complaint when oversight may help. This guide is general information, not legal advice.

Start here: what problem are you trying to solve?

Before you pick an agency, get clear on two things: what kind of insurance the patient has, and what kind of problem you are facing.

Coverage might be Medicare, Medicaid, a plan from work, a plan bought on the ACA Marketplace (HealthCare.gov), or another private plan. The problem might be a denied claim, a denied prior authorization, a surprise bill, a bill from a doctor or hospital, trouble with an insurance agent, or Medicaid saying the person is not eligible.

Gather any paperwork you have: a denial letter, an Explanation of Benefits (EOB), bills, notices, or a decision from an appeal. Check whether there is a deadline to appeal. If the patient could be harmed by waiting, treat that as urgent.

If there is an appeal deadline, do not wait for the regulator to finish first. File the appeal on time, ask for an expedited appeal if delay is dangerous, and file the regulator complaint as a separate step. The Appeals Roadmap walks through denials step by step.

Complaint or appeal: know the difference

Use an appeal when you want the plan to change its decision. That usually means the plan denied a medication, surgery, test, hospital stay, equipment, or therapy; paid less than you expected; said care was not medically necessary; said the person is not eligible; or is cutting off services.

Use a complaint when the fight is about how you were treated during the process. Maybe the plan will not explain the denial in writing. Maybe every phone call gives a different answer. Maybe the plan missed a deadline it was supposed to meet. Maybe you never got plan documents or the medical rules the plan used. Maybe you got a bill that looks like a surprise bill, or a broker signed someone up for a plan they did not want.

The strongest approach is often to appeal the denial, keep a written record of what went wrong, and send a focused complaint to the agency that oversees that type of coverage. The Denial Decoder helps explain what a denial usually means; this guide helps you find the right regulator.

When to contact a state insurance department

Each state has an insurance department that oversees many private insurers and insurance agents. This is often the right starting point when the problem involves a plan you bought yourself, a Marketplace plan, or a fully insured employer plan (one where a real insurance company takes the financial risk, not just administers claims).

State insurance departments also handle many agent and broker problems, claim delays and denials, premium and billing disputes, and trouble finding in-network doctors. They can often forward your complaint to the company, require a written response, and tell you whether they have authority over your case. They can also point you toward external review when state law allows it.

One important exception: some job-based plans are self-funded. That means the employer pays medical claims from its own money, and the insurance card may only show a company that runs the plan. State insurance departments may have limited power over those plans. If you are not sure, you can still call the state department—they may tell you to contact the employer or the federal Department of Labor instead. Read Self-funded ERISA plans and use State insurers & legislationto find your state's contacts and playbooks.

When to contact the Department of Labor

The U.S. Department of Labor oversees many employee benefit plans through an office called EBSA (Employee Benefits Security Administration). If the patient has health coverage through work, EBSA is an important agency to know about—especially for self-funded employer plans and problems with how the plan handled appeals or paperwork.

Contact EBSA when the patient cannot get basic plan documents, when the plan will not explain a denial, when appeal steps were not followed, when there are COBRA problems after leaving a job, or when you suspect the plan is not following federal rules that apply to employer benefits (often called ERISA).

EBSA is especially helpful when the issue is not only "they denied the claim," but "they did not run the process fairly." For many employer plans, advocates file with EBSA and also file with the state insurance department if the insurer's own conduct—not just the employer's plan design—is part of the problem.

When to contact CMS

CMS (Centers for Medicare & Medicaid Services) is the main federal agency for Medicare and for many national health rules. You will use different CMS pathways depending on what went wrong.

Medicare

For people with Original Medicare, Medicare Advantage, or Medicare Part D, Medicare has its own appeal and complaint systems. If Medicare refused to pay for a service or drug, that is usually an appeal. If the problem is poor service, long waits, rude staff, or trouble getting appointments through a Medicare plan, that may be a grievance or complaint instead of a payment appeal.

The label matters because the forms and deadlines differ. When in doubt, ask Medicare (or the plan) which track fits your situation, and still protect any appeal deadline you were given in writing.

Surprise medical bills

Federal law limits many surprise medical bills—for example, emergency care from an out-of-network doctor, or a specialist at an in-network hospital who does not take your plan. CMS runs the No Surprises Help Desk for patients who think a bill breaks those rules or who were not given required notices before certain non-emergency out-of-network care.

You can file a surprise-billing complaint while you are also talking to the hospital, doctor, and health plan. Our Surprise billing guide explains patient protections in more detail.

Marketplace issues

Marketplace problems split into two worlds. If the issue is eligibility for coverage, tax credits, enrollment, or a special enrollment period after a life change, use the Marketplace's own appeal or complaint process. If the issue is the insurance company denying a claim or refusing to pay after you are enrolled, start with the plan's appeal and consider the state insurance department as well.

If the patient is still shopping for coverage, see Choosing a Plan.

When to contact a Medicaid agency

Medicaid is a state program with federal oversight. The state Medicaid agency is usually central when someone is told they are not eligible, when benefits are cut off, when renewal paperwork goes wrong, or when a Medicaid managed care plan will not approve care or handle an appeal fairly.

Many Medicaid patients get care through a private managed care plan. In those cases you typically complain or appeal to the plan first. If the patient's health is at risk, ask for a fast (expedited) appeal—see the Appeals Roadmap. If the plan still says no, you may be able to request a state fair hearing. You can also contact the state Medicaid agency when the plan's process is broken or too slow.

State rules vary. Use State Medicaid guides and your state playbook (for example, Indiana internal appeals or Indiana external review).

If Medicaid is being reduced or ended, ask right away whether the patient can keep benefits while the appeal is pending. The name of that protection and the deadline to request it differ by state, and missing the window can cost the patient their coverage.

When to contact an attorney general

A state attorney general's office often handles consumer protection: scams, fraud, and unfair business practices. This is a good path when someone enrolled the patient in a plan without consent, when sales materials were misleading, when a product was sold as real insurance but was not, or when a company keeps billing after repeated attempts to fix an obvious error.

An attorney general complaint is usually not the fastest way to reverse a single medical denial. For urgent coverage, file the plan appeal or Medicaid fair hearing first. Use the attorney general when the conduct looks deceptive, fraudulent, or like a pattern that could hurt other people too.

If you are unsure, file with more than one agency

It is normal not to know whether a plan is fully insured, self-funded, governed by federal employer law, or overseen by the state. Patients are often bounced between the insurer, the employer, and several agencies.

When deadlines are tight, it can be reasonable to file with every agency that might have authority, as long as you still file appeals on time. For a job-based denial, that might mean an internal appeal plus EBSA plus possibly the state insurance department. For a Marketplace claim denial, file the plan appeal and contact the state insurance department. For Medicare Advantage, follow Medicare's appeal path and file a grievance if the plan mishandled the process. For Medicaid managed care, use the plan's appeal, then a fair hearing if allowed, then the state Medicaid agency. For a surprise out-of-network bill, dispute the bill and contact the No Surprises Help Desk. For broker fraud, notify the Marketplace or insurer, the state insurance department, and the attorney general.

How appeals change by plan type can help you sort coverage before you send anything.

What to include in a regulator complaint

A good complaint reads like a short, factual story. You want a stranger at the agency to understand what happened, what rule or process might have been broken, and what you want them to do.

Include the patient's name and contact information, and your name if you are helping as an advocate. Name the insurance plan, member ID, employer (if any), and any Medicaid, Medicare, or Marketplace case number you have. Name the doctor or hospital involved and the dates of care. Add claim numbers, authorization numbers, appeal numbers, and complaint numbers from prior calls.

Attach copies—not originals unless asked—of denial letters, bills, EOBs, appeal decisions, and key medical records. Add a simple timeline (date by date) and a call log (who you spoke to, when, reference number, what they said). End with a clear request: for example, require a written response, investigate whether rules were followed, or refer the case to another agency.

The Building a Strong Appeal Packet guide can help you organize records for both appeals and complaints.

How to write the complaint

Start with one plain sentence that states the problem. For example: "I am filing this complaint because the plan denied a medically necessary service and has not followed its appeal procedures." Then name who is involved—the patient, the plan, the employer if relevant, and the provider.

Walk through the timeline in order. Explain what went wrong: the denial, the delay, the conflicting phone answers, or the bill. Say why it matters for the patient's health, money, or access to care. Say what you want: approval, a corrected claim, a hold on collections, a written explanation, a faster review, or an investigation. List your attachments at the end.

You do not need legal language. You need clarity. Put the most important facts up front; save long emotional detail for later paragraphs if you include it at all.

Sample complaint paragraph

What regulators can and cannot do

Regulators can often require the company to respond in writing, check whether rules were followed, explain which agency should handle the case, point you toward appeal or external review options, look for patterns of bad behavior, send the file to another agency, and sometimes help fix the individual problem.

They usually cannot act as your lawyer, give medical advice, guarantee payment, order treatment in every situation, replace a required appeal or fair hearing, extend every deadline, or solve every dispute between you and a hospital's billing office.

Think of a complaint as one tool in the toolbox. It works best with timely appeals (internal appeal and external review when you qualify), organized paperwork, support from the treating clinician, and persistence when the process breaks down.

Practical tips for advocates

Keep one master timeline. Every call, portal message, denial, bill, and appeal should land on a single chronological list so you can paste it into letters without reconstructing memory weeks later.

Ask for everything in writing. If someone says care is approved on the phone, ask for the authorization number and an email or letter confirming it. If delay could seriously harm the patient, use the words "expedited" or "urgent" in writing, not only on a call.

Follow up in a trackable way—portal message, fax, or certified mail—so you can prove what you sent and when. Ask for the denial reason, the plan's medical rules, and plan documents when those are missing. Remember that a regulator complaint does not automatically save appeal deadlines; calendar those separately.

Ask billing offices to pause collection while appeals or complaints are pending when they will agree to do so. When the plan ignores its own rules, say that clearly in your complaint; process failures can be as important as the original denial.