Employer Insurance vs Marketplace Insurance: Different Appeal Rights Explained

If you have had a health insurance claim denied, the most important question to ask before writing your appeal is: what kind of insurance do you have? Employer-sponsored insurance and ACA marketplace insurance are governed by completely different legal frameworks, enforced by different agencies, and provide different consumer protections. The wrong appeal strategy for your plan type can cost you your case.

Two Fundamentally Different Legal Systems

ACA Marketplace Plans are fully insured plans sold to individuals and families through healthcare.gov or state exchanges. They are regulated primarily by state insurance law (enforced by your state insurance commissioner) and must comply with ACA consumer protections including guaranteed issue, essential health benefits coverage, and the appeals process requirements in ACA Section 2719.

Employer-Sponsored Plans break into two categories. The distinction is critical:

• Fully insured employer plans are purchased by employers from insurance companies. The insurer bears the financial risk. These plans are subject to state insurance law in addition to federal ERISA requirements.
• Self-funded (self-insured) employer plans are funded directly by the employer. The employer bears the financial risk and contracts with an insurer or Third Party Administrator (TPA) only to administer claims. Self-funded plans are governed exclusively by ERISA — state insurance law does not apply.

Approximately 65% of workers with employer-sponsored insurance are enrolled in self-funded plans. If you are in this majority, your state insurance commissioner generally cannot help you, state consumer protection laws are largely preempted, and your appeal rights are determined entirely by federal ERISA requirements.

Why This Distinction Matters for Appeals

The plan type determines:

• Who enforces your rights (state insurance department vs. federal DOL/EBSA)
• Whether state mandates apply (they do for fully insured; they do not for self-funded ERISA)
• What External Independent Review: Complete Guide" class="auto-link">external review rights you have
• Whether you can sue in state court (generally no for self-funded ERISA plans — only federal court)
• What standard of review applies if you go to court

What ACA Marketplace Plans Provide

Marketplace plans must comply with the ACA's consumer protection framework:

• Internal appeal: Insurer must respond within 30 days (pre-service) or 60 days (post-service) of receiving a complete appeal
• Expedited appeal: 72-hour turnaround for urgent/concurrent appeals
• External review: By a federally accredited IROs) Explained" class="auto-link">Independent Review Organization (IRO). The IRO's decision is binding on the insurer
• Continuation of benefits: For ongoing treatment, you can request continued coverage while the appeal is pending
• State enforcement: State insurance commissioners actively regulate marketplace insurers. Filing a state complaint is an effective tool and can trigger market conduct examinations

Marketplace consumers in states like California, New York, and Colorado benefit from additional protections beyond federal minimums — step therapy exception rights, stronger network adequacy standards, and Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization reform requirements.

How to find your state's marketplace appeal resources: Your state insurance commissioner maintains a consumer assistance program and complaint process at naic.org or directly at your state's insurance department website.

What ERISA Self-Funded Plans Provide (And Don't)

ERISA provides a federal framework for employer plan appeals, but it is significantly less consumer-friendly than the ACA marketplace framework:

What ERISA requires:

• Internal appeal with specific procedural requirements (written denial notice, specific reasons, appeal instructions, access to plan documents)
• Plan must respond within 60 days (routine) or 72 hours (urgent) for internal appeals
• External review: required for most self-funded plans under the ACA's extension of external review requirements, but gaps exist for grandfathered and governmental plans

What ERISA does not provide:

• State insurance commissioner jurisdiction — if your employer self-funds its plan, your state insurance commissioner generally cannot help you regardless of how egregious the denial
• DOL enforcement on individual claims — the Department of Labor's EBSA accepts complaints and can conduct investigations, but lacks claim-by-claim enforcement like state insurance departments
• State mandate compliance — self-funded ERISA plans are not required to follow state insurance mandates (infertility coverage, autism ABA therapy, mental health parity state additions)

Judicial review under ERISA: ERISA allows lawsuits in federal court after exhausting plan remedies. However, if the plan document gives the administrator "discretionary authority" to determine benefits (a common plan provision), courts apply the "arbitrary and capricious" standard — extremely deferential to the insurer. Unless the plan lacks a discretionary clause (some states have banned them), winning in court is difficult.

The Discretionary Clause Issue

This is the most important legal detail in ERISA litigation. If the plan document grants the administrator discretionary authority to interpret plan terms and determine benefits:

• Courts use the "arbitrary and capricious" standard of review
• Even a wrong decision may be upheld if there was any reasonable basis for it
• This makes ERISA litigation challenging

If the plan document does NOT include a discretionary clause (required to be removed in California, Connecticut, Illinois, Michigan, Montana, South Dakota, Vermont, and other states):

• Courts use de novo review — independently assessing whether the denial was correct
• This substantially improves your litigation position

The Summary Plan Description (SPD) will contain the discretionary clause, or the absence of one. This is the first document a healthcare attorney will review.

Government Employee Plans

Federal employees: Federal Employees Health Benefits (FEHB) program, administered by the Office of Personnel Management (OPM). FEHB plans are not subject to ERISA and follow their own appeal processes. OPM has a dedicated Health Insurance Inquiry process for dispute resolution.

State and local government employees: May be in ERISA plans, governmental ERISA-exempt plans, or plans subject to state insurance regulation. The analysis varies by employer and state.

Medicare: Separate appeal system with five levels (MAC redetermination → QIC → ALJ → Appeals Council → Federal Court). Not ERISA and not state-regulated.

How to Identify Your Plan Type

To determine whether you are in a fully insured or self-funded plan:

1. Look at your Summary Plan Description (SPD) — if it names an insurance company as both the administrator and the underwriter/risk-bearer, it is likely fully insured
2. Check the front of your insurance card — if it shows "ASO" (Administrative Services Only) or names a TPA, the plan is likely self-funded
3. Ask your HR department directly: "Is our health plan self-insured or fully insured?"

How to Appeal Regardless of Plan Type

The foundational elements of an effective appeal are the same for both plan types:

1. Request your complete claims file and the specific clinical criteria used in the denial
2. Obtain a detailed supporting letter from your treating physician addressing the specific denial reason
3. Document any procedural failures by the insurer (wrong reviewer specialty, missed deadlines)
4. For ERISA plans: be comprehensive in the internal appeal — this is typically the only record a court will consider

For ERISA plans specifically: Unlike marketplace plans, ERISA plans generally do not allow you to add new evidence after your administrative record is closed. This means you must include every document, argument, and piece of evidence in your internal appeal, even if you are uncertain whether it is relevant.

Documentation Checklist

• Your Summary Plan Description (SPD) identifying plan type and appeal process
• Denial letter with specific denial reason and plan provision cited
• Physician letter addressing the specific denial criteria
• Relevant clinical records supporting medical necessity
• State insurance commissioner contact (for fully insured plans)
• DOL EBSA complaint form (for self-funded ERISA plans)
• External review request form (available from the plan or state)

Fight Back With ClaimBack

Understanding which legal framework governs your insurance is the first step to fighting a denial effectively. The rules are different depending on your coverage. Your right to fight back is not. ClaimBack generates a professional appeal letter in 3 minutes.

Start your free claim analysis →

Free analysis · No credit card required · Takes 3 minutes

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal