Insurance coverage for weight loss medication varies widely depending on whether you have Medicare, Medicaid, or private insurance through an employer. Six FDA-approved medications exist for long-term weight management, but most insurance plans cover only some of them, and nearly all require prior authorization before they’ll pay. The newer GLP-1 drugs like Wegovy and Zepbound get the most attention, but they’re also the hardest to get covered.
FDA-Approved Weight Loss Medications
The FDA has approved six medications for long-term weight management. Understanding which category each falls into helps explain why some are easier to get covered than others.
- Orlistat (Xenical, Alli): Works in your gut to reduce fat absorption from food. The lower-dose version (Alli) is available over the counter. This is the oldest option and typically the cheapest.
- Phentermine-topiramate (Qsymia): Combines an appetite suppressant with a seizure medication that also reduces hunger. Available as a pill.
- Naltrexone-bupropion (Contrave): Combines a medication used for alcohol dependence with an antidepressant. Works on brain pathways that control cravings and appetite. Available as a pill.
- Liraglutide (Saxenda): A daily injection that mimics a gut hormone called GLP-1, which signals fullness to your brain.
- Semaglutide (Wegovy): A weekly injection that also mimics GLP-1 but is more potent than liraglutide. Also approved to reduce heart attack and stroke risk in people with cardiovascular disease.
- Tirzepatide (Zepbound): A weekly injection that mimics two gut hormones (GLP-1 and GIP), making it the most effective option for weight loss in clinical trials. Also approved for moderate to severe obstructive sleep apnea.
Phentermine on its own is also widely prescribed, but it’s only approved for short-term use (a few weeks). Because it’s a generic and costs very little, many insurers cover it without much pushback.
Private Employer Insurance Coverage
If you get insurance through your job, coverage for GLP-1 weight loss drugs is still the exception, not the rule. According to the 2025 KFF Employer Health Benefits Survey, only 19% of firms with 200 or more workers cover GLP-1 medications for weight loss. Your odds improve at larger companies: 43% of firms with 5,000 or more employees cover them, up from 28% the year before. At mid-size companies (200 to 999 workers), only 16% offer coverage.
The older oral medications tend to fare better with private insurance. Contrave and Qsymia are more commonly included on formularies, often at lower copay tiers than the injectable GLP-1 drugs. Orlistat, being the oldest and least expensive, is the most widely covered weight loss medication across plan types. When GLP-1 drugs are covered, they’re typically placed on the highest formulary tier, meaning your copay or coinsurance will be significantly more than for a standard prescription.
Even when your plan technically covers a weight loss medication, you’ll almost certainly face prior authorization requirements and possibly step therapy, which means your insurer may require you to try a cheaper medication first before approving a GLP-1.
What Insurers Require for Approval
Prior authorization for weight loss medications follows a fairly standard pattern across insurers. Using Cigna’s criteria as a representative example, you generally need to meet one of these thresholds:
- BMI of 30 or higher with no additional conditions required
- BMI of 27 or higher plus at least one weight-related health condition, such as high blood pressure, type 2 diabetes, high cholesterol, sleep apnea, cardiovascular disease, knee osteoarthritis, asthma, COPD, fatty liver disease, or polycystic ovarian syndrome
For adolescents, the threshold is a BMI at or above the 95th percentile for their age and sex. Wegovy and Saxenda are approved for pediatric use, while Zepbound currently is not.
Wegovy has a separate approval pathway for reducing cardiovascular risk. If you have a BMI of 27 or higher and a history of heart attack, stroke, or symptomatic peripheral artery disease, your insurer may approve it under that indication, which can sometimes be easier than getting approval for weight loss alone.
Your doctor will need to document your BMI, relevant diagnoses, and often your participation in lifestyle changes like a structured nutrition plan and physical activity. Some insurers require documented evidence that you’ve already tried diet and exercise or a previous medication before they’ll authorize a GLP-1. This “step therapy” requirement is one of the most common reasons for initial denials.
Medicare Coverage
Medicare Part D has historically excluded weight loss medications entirely. Federal law specifically bars Part D from covering “agents when used for weight loss,” which has kept drugs like Wegovy and Zepbound out of reach for most Medicare beneficiaries paying out of pocket.
There are two important exceptions. First, GLP-1 medications approved for type 2 diabetes (such as Ozempic, the diabetes version of semaglutide) are covered under Part D when prescribed for that purpose. Second, after Wegovy received FDA approval in 2024 to reduce the risk of major cardiovascular events, Medicare began covering it for enrollees who have both obesity or overweight and established cardiovascular disease. This means Wegovy is now covered for some Medicare beneficiaries, but only for that specific combination of conditions, not for weight loss alone.
A newer development is the Medicare GLP-1 Bridge program from CMS, which has broader eligibility. Under this program, a provider can submit a prior authorization if you are at least 18 and meet one of these criteria: a BMI of 35 or higher, a BMI of 30 or higher with heart failure, uncontrolled high blood pressure, or chronic kidney disease (stage 3a or above), or a BMI of 27 or higher with pre-diabetes, previous heart attack, previous stroke, or symptomatic peripheral artery disease. Your doctor must also confirm that you’re currently following a lifestyle plan that includes structured nutrition and physical activity.
Medicaid Coverage
Medicaid coverage for weight loss medications varies dramatically by state. There is no federal mandate requiring state Medicaid programs to cover anti-obesity drugs, so each state sets its own policy. Some states cover certain oral medications but exclude injectables. Others cover GLP-1s but impose strict clinical requirements.
Common Medicaid restrictions include specific BMI thresholds, mandatory documentation of weight-related health conditions, proof that you’ve already tried and failed a structured weight loss program, time-limited approval periods that require re-authorization, and ongoing weight loss targets you must meet to continue receiving the medication. These requirements vary enough from state to state that your best starting point is checking your state’s Medicaid formulary or calling your managed care plan directly.
Manufacturer Savings Programs
If you have commercial (non-government) insurance, manufacturer savings cards can significantly reduce your out-of-pocket costs. Novo Nordisk, which makes Wegovy, offers a savings program that can bring your copay down to as little as $25 per month, with a maximum savings of $100 per month. Eli Lilly offers a similar program for Zepbound.
These programs are only available to people with private insurance. If you have Medicare, Medicaid, Tricare, or any other government-funded plan, you’re excluded. One detail that catches people off guard: if you have both commercial insurance and any government plan, you’re still considered a government beneficiary and can’t use the savings card. However, Federal Employees Health Benefits (FEHB), Affordable Care Act marketplace plans, and state employee plans are not considered government programs for these purposes, so people on those plans can participate.
How to Check Your Specific Coverage
The fastest way to find out what your plan covers is to call the number on the back of your insurance card and ask the pharmacy benefits team two questions: which weight loss medications are on your formulary, and what prior authorization criteria apply. You can also ask your doctor’s office to run a benefits investigation, which they do routinely when prescribing these medications.
If your initial prior authorization is denied, you have the right to appeal. Many denials are overturned on appeal when additional clinical documentation is submitted. Your doctor can provide records of your BMI history, related health conditions, and previous weight management efforts. Some people also find success by asking their doctor to prescribe the medication under a different approved indication, such as cardiovascular risk reduction for Wegovy, if they qualify.
If your employer plan doesn’t cover weight loss medications at all, it’s worth raising the issue with your HR department. The sharp increase in large-employer coverage from 2024 to 2025 suggests that more companies are adding these benefits as demand grows and as evidence of long-term health cost savings accumulates.