For many people living with obesity, the biggest insurance challenge isn’t a denial for a specific drug — it’s that the plan doesn’t cover any medication for that condition at all, even if the drug is FDA approved for that condition and covered for other conditions. “Plan exclusions” are becoming more common as the popularity of GLP-1 medications increases. If you’re facing one, you’re probably thinking: What do I do now?

How do I know if I have a plan exclusion for GLP-1s?‍

If your GLP-1 was denied, look for language like this in the denial letter. This type of language typically indicates a plan exclusion.

• “Not a covered benefit”
• “Your benefit plan simply does not cover this medication, no matter what the reason is that it is being requested”
• “We denied this request based on general exclusion section of formulary”
• “Your plan does not cover this drug when it is used for weight loss”
• “For this drug, you may have to meet other criteria”
• “This request has been administratively denied"
• “Excluded from coverage”
• “Not eligible"

You may have also received a letter in the mail ahead of your 2026 plan year notifying you of coverage changes like plan exclusions. Check your letter or plan documents for language like “medications prescribed for weight loss are excluded” or "not covered".

Plan Exclusion vs. Formulary Exclusion: What’s the Difference?

Plan exclusions and formulary exclusions are two of the most common reasons insurance denies covered. Formulary exclusions, however, are easier to fight. It’s important to understand which one you’re dealing with.

Formulary Exclusion (A Specific Drug Isn’t Covered)

A formulary is the list of drugs your insurance plan agrees to cover. Plans frequently:

• exclude certain drugs, asking patients to use their preferred alternatives instead
• place them in high cost-sharing tiers, or
• cover them only for one use (e.g., diabetes) but not another (e.g., obesity). 

If the plan covers the condition (e.g., diabetes) but simply doesn’t cover your particular drug, you can ask for a formulary exception. 

Formulary exceptions have a legally protected process for all insurance plans, requiring them to reconsider whether a medication should be covered— even if it’s not on the formulary—because the alternatives are not equivalent and acceptable for you. Learn more about formulary exceptions and how to get one here.

Plan Exclusion (No Drugs For Your Condition Are Covered))

A plan exclusion means the plan’s policy explicitly states that it won’t cover any medicines for a specific condition category. For weight-loss medications, this often shows up as a “Weight Loss Plan Exclusion.” 

This is much harder to challenge. Unlike targeting coverage for one drug, you have to argue that the plan shouldn’t categorically avoid covering any medication for your condition. Plans are legally allowed to exclude coverage for obesity treatment because obesity is currently not recognized by Health & Human Services as a disease. Which means they can write the plan to omit all pharmacologic treatment for obesity. 

Why Obesity — But Not Other Conditions — Can Be Excluded

Under the Affordable Care Act (ACA), health plans must offer a set of Essential Health Benefits (EHBs) like hospitalization, prescription drugs, mental health care, etc. Think of these as “the basics” that you’d need to have reasonable care with an insurance plan. But obesity treatment itself is not currently listed as an EHB that plans must cover. 

That’s why insurers can choose a plan that says “no coverage for medications prescribed for weight loss,” and courts have generally declined to force coverage. 

By contrast, plans cannot exclude essential services for conditions like:

• Obstructive Sleep Apnea (OSA): A sleep disorder where obesity is a primary risk factor. Treatment for OSA is typically covered even when obesity medications are not.
• Metabolic Dysfunction–Associated Steatohepatitis (MASH): A fatty liver disease linked to obesity and commonly covered by insurance, despite the exclusion of obesity treatment.
• Major Adverse Cardiovascular Events (MACE), including Stroke (CVA): Serious heart attack and stroke outcomes. Treatment and prevention are broadly covered even though obesity is a major underlying risk factor.

This highlights a major problem with insurance coverage: health plans will pay to treat illnesses caused by obesity once they’ve become severe enough, but they won't pay for the obesity treatment itself. Treating obesity could actually lower the risk of all those other diseases – but insurance doesn’t want to cover it until bigger issues arise.

Why Plan Exclusions Are Difficult to Appeal

When a claim is denied based on a plan exclusion, insurers usually respond:

“This service is not a covered benefit under your plan.”

That’s not a denial that the treatment is  medically  necessary for you  — it’s a statement that the plan has no obligation whatsoever to pay for it even if it is. Because of this, most appeals get rejected without any deeper review of your clinical circumstances.

So if your plan’s written documents (e.g., Summary Plan Description or Evidence of Coverage) explicitly state that “medications prescribed for weight loss are excluded,” there’s often no administrative appeal pathway under the plan itself — because, under the plan’s terms, you aren’t eligible for that benefit at all. 

What You Can Do If Your Plan Doesn’t Cover Medications For Weight Loss

Here are practical options when you’re up against a plan exclusion:

1) Appeal to Your Employer Directly

If you’re on a self-funded employer plan, you can ask them to make an exception. Self-funded employer plans are a common type of healthcare plan that is designed and funded by the employer itself Most people with healthcare through their employer have this type of plan. A self-funded plan  means your employer:

• Can grant exceptions to plan rules;
• Has a fiduciary duty to act in the best interests of participants;
• May be exposed to risk if an exclusion appears arbitrary or discriminatory.

Some employers are willing to make case-specific exceptions if presented with compelling medical evidence and employee support. This usually involves writing to HR or your benefits administrator, explaining:

• why the exclusion harms health outcomes,
• how coverage would improve health and reduce long-term costs,
• that the exclusion may conflict with anti-discrimination principles or ERISA fiduciary standards

Get our FREE sample letter to employer benefits admin at the bottom of this post 👇

How to make your appeal to HR even more effective? Organize with other colleagues impacted by the plan exclusion to show the full scale of the issue.

2) Advocate for Policy Change

If your health plan excludes obesity treatment, it’s not because the science is lacking — it’s because U.S. health policy hasn’t caught up. Changing that requires action beyond individual appeals.

Here are a few meaningful ways to get involved.

• Support federal legislation. The Treat and Reduce Obesity Act (TROA) is an active bill in Congress that would expand Medicare coverage for FDA-approved obesity treatments and help establish obesity as a condition deserving comprehensive medical care. Medicare policy often influences private insurers, making this a critical step toward broader coverage.
• Protect and expand coverage in public programs. Coverage for obesity medications is actively being debated in Medicare, Medicaid, TRICARE, and state employee health plans. Advocacy efforts are underway to prevent coverage rollbacks and support state-level bills that expand access to care.
• Engage in policy advocacy and education. Public comments, patient stories, and education efforts play a real role in shaping insurance and regulatory decisions. Elevating lived experiences helps counter outdated assumptions that continue to drive exclusions.

One of the easiest ways to participate is through the Obesity Action Coalition (OAC), a leading nonprofit organization advocating for people living with obesity. OAC provides tools to:

• Sign petitions
• Contact elected representatives
• Support active federal and state legislation
• Share experiences that inform policy advocacy
  

👉 Learn more and take action at obesityaction.org/action-center

Policy change takes time, but it’s the only path to permanently ending blanket exclusions for obesity treatment. Individual voices matter — especially when they’re raised together.

3) Explore Cash Pay and Direct Pay Options

Even when insurance coverage is excluded, there are increasingly affordable cash-pay options for weight-loss medications:

• Wegovy: Newly released oral Wegovy tablets are available for approximately $149–$299 per month, depending on dose. Cash-pay injectable Wegovy options are available starting around $349 per month. Visit NovoCare for current pricing and eligibility details.
  
  
• Zepbound: Cash-pay Zepbound vials are available for approximately $299–$449 per month, depending on dose. At this time, prefilled Zepbound injection pens are not offered at a reduced cash-pay price. Visit LillyDirect for current pricing and eligibility details.

These direct-to-consumer programs are not insurance coverage, but they can provide access when a health plan excludes treatment. A valid prescription from a licensed healthcare provider is required.

FAQs

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Why is my GLP-1 not covered by insurance?

There are a few common reasons: your plan may have a weight loss medication exclusion, the specific drug may not be on the formulary, or your request may require prior authorization and didn’t meet the plan’s criteria. The denial letter usually includes the exact reason—look for phrases like “not a covered benefit,” “excluded from coverage,” or “not on formulary.”

What does it mean when a GLP-1 is “not a covered benefit”?

“Not a covered benefit” usually means your plan explicitly excludes treatments for your condition. This is increasingly common for GLP-1s. In many cases, your next step is to request the plan’s written policy language as well as explore if other conditions you have been diagnosed with, like sleep apnea or fatty liver disease, are eligible for coverage for the medication.

What does “excluded from coverage” mean on a denial letter?

“Excluded from coverage” typically means your plan documents explicitly state the plan does not cover the drug (or drug category) for that use (often weight loss). It’s still worth confirming whether it’s a true plan exclusion versus a drug-specific formulary issue or an administrative error.

Is a plan exclusion the same as a formulary exclusion?

No. A formulary exclusion means the plan doesn’t cover a specific drug (or prefers alternatives). A plan exclusion means the plan doesn’t cover any drugs for a category/condition (like weight loss medications), which is typically harder to overturn.

Can I appeal a plan exclusion for Wegovy, Zepbound, or other medications?

Sometimes – but it depends on the plan and the type of decision being made. If your denial is truly based on a plan exclusion, a standard appeal may be limited; however, you may still be able to request a coverage exception, pursue an employer-level exception (for employer-sponsored plans), or escalate through available review options if the plan allows it.

Why does my plan cover Zepbound for OSA or Wegovy for MASH, but not for weight loss?

Many plans cover GLP-1s for specific diagnoses (like diabetes or OSA) but exclude or restrict coverage for weight loss/obesity. Your denial letter may say the plan “only covers this drug for certain conditions” or that it’s “not covered for your diagnosis.”

Does insurance cover Wegovy for weight loss?

Some plans do, but many require prior authorization and some plans exclude weight loss medications entirely. The fastest way to confirm is to check your plan formulary and your plan’s pharmacy benefit rules—and if you’re denied, review the denial letter for whether it’s a criteria denial or a plan exclusion.

Does insurance cover Zepbound for weight loss?

Some insurance plans cover Zepbound for weight loss with prior authorization, while others exclude weight loss medications as a benefit category. If you’re denied, the exact wording matters: “criteria not met” usually means you can appeal with documentation, while “excluded from coverage” may require an exception or employer benefits route.

Are weight loss drugs covered by insurance in general? Which insurance plans cover weight loss?

Sometimes, but it’s inconsistent. Many plans cover certain weight loss treatments or programs, while excluding weight loss medications – or covering them only under strict criteria and prior authorization rules. The most reliable way to know is to check your specific plan’s language.

Which weight loss medications are most likely to be covered?

Coverage depends on the plan’s formulary, tiering, and prior authorization rules. Some plans cover a limited set of medications or prefer certain options, while excluding others. If your plan covers weight loss medications at all, the next step is often figuring out which drugs are preferred and what documentation is required.

What should I do if my GLP-1 is denied as “not medically necessary”?

That’s usually not a plan exclusion—it typically means the plan thinks the request doesn’t meet coverage criteria or doesn’t have enough documentation. Ask for the exact criteria used, gather supporting documentation with your prescriber, and submit an internal appeal or resubmission (depending on plan instructions).

If my plan excludes weight loss medications, can my employer override it?

Sometimes—particularly for employer-sponsored plans, where benefit design decisions may be made by the employer. Employees can sometimes request the employer/benefits administrator review the exclusion or consider an exception process. (This varies by employer and plan structure.)

How do I find out if my plan is self-funded?

You can ask your HR/benefits team or the plan administrator. You can also look in your plan documents for language about who pays claims (employer vs insurer) or who the plan sponsor is. If you’re unsure, ask: “Is this plan self-funded or fully insured?”

Can I switch insurance plans to get GLP-1 coverage?

If you have an opportunity to change plans (like open enrollment or a qualifying life event), you can compare formularies and benefit exclusions before enrolling. Make sure you’re checking both (1) whether the drug is covered and (2) whether weight loss medications are excluded.

If insurance won’t cover my GLP-1, what are my options?

Options may include pursuing an exception pathway (if available), employer benefits advocacy (for employer coverage), exploring manufacturer savings programs (if eligible), or cash-pay/direct-pay programs. Which option is best depends on whether your denial is a true plan exclusion or a criteria/formulary denial.

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Free Sample Letter to Employer / Benefits Admin:
Coverage Exception & Policy Review Request (Self-Funded Employer Plan)

[Your Name]
[Street Address]
[City, State, ZIP]
[Phone Number]
[Email Address]
[Date]

[Benefits Committee or HR Representative Name]
[Job Title]
[Company Name]
[Company Address]

Dear [Benefits or Human Resources Representative Name],

I am writing to ask for your help with health insurance coverage for medical care that my healthcare provider has determined is medically necessary. I am grateful for the benefits that [Company Name] provides and for the company’s stated commitment to employee well‑being, equity, and long‑term health. It is in that spirit that I am requesting a case‑specific exception to our current health plan’s exclusion of obesity treatment.

I live with the chronic disease of obesity and have been prescribed [name of medication or treatment] by my clinician as part of a comprehensive treatment plan. This recommendation follows sustained lifestyle interventions and reflects current medical consensus regarding evidence‑based obesity care. I recently learned that our plan, [plan name / administrator], excludes coverage for medications prescribed for obesity, regardless of medical necessity.

This exclusion has made clinically appropriate care inaccessible and financially prohibitive for me. Obesity has already had meaningful impacts on my health and quality of life, including [briefly describe related conditions, risks, or symptoms]. My provider has determined that continued treatment is critical to improving my health trajectory and reducing future medical risk.

Why I Am Requesting an Exception:
Obesity Is a Chronic Disease With Serious Health Consequences

Obesity is widely recognized by the medical community as a chronic, progressive disease associated with increased risk of cardiovascular disease, type 2 diabetes, stroke, certain cancers, sleep apnea, and other serious conditions. National data show that more than 40% of U.S. adults live with obesity, and obesity‑related medical costs exceed $170 billion annually. Treating obesity improves health outcomes and reduces long‑term healthcare costs for both individuals and employers.

Importantly, not all obesity treatments work for all patients. Clinical guidelines emphasize the need for individualized care, including FDA‑approved pharmacologic therapies when lifestyle interventions alone are insufficient. Denying access to these therapies limits clinicians’ ability to provide patient‑centered care and places employees at increased risk of preventable disease progression.

Considerations for Self‑Funded Plans

I understand that [Company Name] sponsors a self‑funded health plan. As the plan sponsor, the company retains discretionary authority over benefit design and coverage decisions and holds fiduciary responsibility under the Employee Retirement Income Security Act (ERISA) to act prudently and in the best interests of plan participants.

While insurers or third‑party administrators may apply plan exclusions as written, the employer has the authority to grant individual coverage exceptions, and review whether existing exclusions continue to align with fiduciary obligations, medical standards, and employee well‑being.

I am therefore requesting review at the employer level, rather than through the insurer’s standard appeal process, which does not evaluate medical necessity when a categorical exclusion applies.

Policy and Clinical Standards (For Consideration)

While I am not a lawyer, I believe it is important for the plan sponsor to be aware of the evolving policy and clinical standards related to obesity care, which increasingly recognize obesity as a chronic disease requiring evidence-based treatment.

1. Federal Policy Momentum Reflecting Changing Standards of Care

Obesity treatment access is an active area of federal policy consideration. The Treat and Reduce Obesity Act (TROA) has been reintroduced in Congress and would expand Medicare coverage for obesity treatment, including FDA-approved medications and access to specialized providers. While TROA has not yet been enacted, its bipartisan reintroduction reflects a growing recognition at the federal level that obesity warrants comprehensive medical treatment.

Importantly, Medicare policy often serves as a bellwether for commercial insurance coverage and employer-sponsored plan design. These developments signal that longstanding exclusions for obesity treatment may be increasingly misaligned with emerging coverage norms.

2. Inconsistent Coverage of the Same Medications Across Diagnoses

Many health plans, including ours, cover GLP-1 medications when prescribed for type 2 diabetes but exclude coverage when the same medications are prescribed for obesity. This distinction exists despite substantial clinical evidence supporting their use for both conditions and growing consensus that obesity is a chronic, progressive disease.

As clinical guidance evolves, coverage decisions based solely on diagnosis—rather than individualized medical need—are increasingly being questioned by clinicians, policymakers, and plan sponsors alike. Several recent legal and policy discussions have focused on whether such distinctions reflect medical evidence or historical coverage conventions.

3. Current Clinical Guidance Supporting Obesity Treatment

Leading medical organizations continue to update standards of care to reflect advances in obesity treatment. For example, the American Diabetes Association’s Standards of Care emphasize the importance of addressing obesity as part of preventing and managing metabolic disease, including the appropriate use of pharmacologic therapy when lifestyle interventions alone are insufficient.

These guidelines reflect broader clinical consensus that obesity treatment should be individualized, evidence-based, and integrated into chronic disease management—not categorically excluded.

4. Fiduciary Considerations for Self-Funded Plan Sponsors

For self-funded employer-sponsored health plans governed by ERISA, plan sponsors have fiduciary responsibility to administer benefits prudently and in the best interests of plan participants. This includes periodically reassessing plan design choices in light of evolving medical standards, treatment effectiveness, and participant impact.

In this context, targeted, case-specific exceptions for evidence-based obesity treatment can be a measured approach that supports employee health while allowing plan sponsors to thoughtfully evaluate whether existing exclusions remain appropriate as standards continue to evolve.

My Request

In light of the above, I respectfully request that [Company Name]:

1. Grant a case‑specific coverage exception for my prescribed obesity treatment based on medical necessity; and
2. Consider reviewing the plan’s obesity treatment exclusion to ensure it aligns with current medical standards, fiduciary responsibilities, and the company’s commitment to employee health and equity.

I am happy to provide supporting documentation from my healthcare provider, including clinical rationale and treatment history, if helpful. I would welcome the opportunity to discuss this request or understand the next steps for review.

Thank you for your time, consideration, and commitment to supporting the health of your employees.

Sincerely,[Your Name]