Getting weight loss shots covered by insurance is possible, but it requires meeting specific clinical criteria, navigating prior authorization, and sometimes appealing a denial. Only about 19 percent of large employers currently cover GLP-1 medications for weight loss, so the path to coverage depends heavily on your specific plan, your BMI, and any related health conditions you have.
Check Whether Your Plan Covers Weight Loss Medications
Before anything else, find out if your insurance plan includes anti-obesity medications in its formulary. Call the number on the back of your insurance card and ask specifically whether injectable weight loss medications are covered. Many plans exclude them entirely, which no amount of documentation can overcome. If your plan does offer coverage, ask about the specific drugs included, any quantity limits, and whether prior authorization is required (it almost always is).
Coverage varies dramatically by employer size. Among companies with 5,000 or more workers, 43 percent now cover GLP-1 medications for weight loss. That drops to 16 percent for companies with 200 to 999 employees. If your employer doesn’t currently cover these drugs, the odds of them adding coverage soon are slim: only 1 percent of large firms without coverage said they were “very likely” to add it within the next year.
If you’re on a marketplace plan or a smaller employer plan, check your plan’s drug formulary online or request a copy. Look for Wegovy (semaglutide) and Zepbound (tirzepatide) by name.
Meet the BMI and Health Requirements
The FDA approves weight loss medications for adults with a BMI of 30 or higher, or a BMI of 27 or higher with at least one weight-related condition such as high blood pressure, type 2 diabetes, or high cholesterol. Most commercial insurers follow these same thresholds, though some impose stricter cutoffs. A Tufts Medical Center analysis found that two out of eleven commercial plans required a BMI above 30 regardless of other health conditions.
Your doctor will need to document your BMI and any relevant diagnoses. If your BMI is borderline, make sure it’s measured and recorded at an office visit before the prior authorization is submitted. Weight-related conditions that commonly qualify include type 2 diabetes, hypertension, obstructive sleep apnea, and cardiovascular disease.
Prepare for Prior Authorization
Every major insurer requires prior authorization for weight loss injections. This means your doctor’s office submits paperwork proving you meet the plan’s criteria before the pharmacy can fill the prescription. Here’s what most plans ask for:
- Documented BMI from a recent office visit, along with your weight history
- Diagnosis codes for obesity and any related conditions
- Evidence of lifestyle modifications such as a reduced-calorie diet and increased physical activity. Eight out of eleven commercial plans studied required this.
- Enrollment in a behavioral modification program. Seven out of eleven plans required patients to participate in a structured program, and six of those required enrollment before starting the medication.
- Documentation of previously tried medications if your plan has step therapy requirements
If your insurer requires a behavioral program, ask your doctor about hospital-affiliated weight management programs, registered dietitian visits, or structured programs that your plan recognizes. Get documentation of your participation before the prior authorization is submitted.
Understand Step Therapy Requirements
Some insurers won’t approve expensive GLP-1 injections until you’ve tried and failed on less costly medications first. This is called step therapy. For example, Blue Cross Blue Shield of Massachusetts requires documented use of two lower-tier GLP-1 medications before approving drugs like Ozempic or Mounjaro. Other plans may require you to try an older combination pill before moving to injectables.
If your doctor believes step therapy is inappropriate for your situation, they can request an exception. This typically requires documenting a medical reason why the first-line drugs won’t work for you, such as a contraindication, a prior adverse reaction, or a clinical reason the preferred medication is unsuitable. Your doctor will need to put this in writing as part of the prior authorization.
Know What Happens After Approval
Getting approved doesn’t mean you’re set indefinitely. Initial approval periods range from as short as 12 weeks to as long as 2 years depending on your plan. When it’s time for reauthorization, every plan that reported continuation criteria required documented weight loss of at least 4 to 5 percent from your starting weight. Two plans also required your BMI to have dropped to 25 or below.
This means keeping your follow-up appointments matters. Regular weigh-ins at your doctor’s office create the paper trail your insurer needs to keep approving refills. If you miss visits or your progress isn’t documented, your coverage could lapse even if the medication is working.
Medicare Coverage: A Changing Landscape
Medicare has historically been prohibited by law from covering medications prescribed specifically for weight loss. That’s starting to shift through two pathways.
First, Wegovy received FDA approval to reduce the risk of heart attacks and strokes in people with established cardiovascular disease who are also overweight or obese. Because this indication isn’t technically “for obesity,” Medicare Part D plans can now add Wegovy to their formularies for patients with a history of heart attack, stroke, or peripheral artery disease. If you’re on Medicare and have cardiovascular disease along with a BMI of 27 or higher, this may be your most viable route to coverage right now.
Second, CMS announced a short-term demonstration program called the Medicare GLP-1 Bridge, running from July 2026 through December 2027. This program will cover Wegovy, Zepbound, and Foundayo for weight reduction, but with stricter criteria than commercial plans. You’ll need a BMI of 35 or higher, or a BMI of 30 or higher with conditions like heart failure, uncontrolled hypertension, or chronic kidney disease, or a BMI of 27 or higher with pre-diabetes, prior heart attack, prior stroke, or symptomatic peripheral artery disease. These thresholds are notably higher than the standard FDA indications.
Medicaid Coverage Varies Widely by State
Medicaid coverage for weight loss medications is inconsistent. As of early 2023, only 10 out of 47 states with public drug lists covered at least one anti-obesity medication, and just 5 states had unrestricted coverage. The number of states reimbursing these drugs has grown over time, from 13 in 2011 to 22 in 2022, but coverage is still the exception rather than the rule. Contact your state’s Medicaid office or check their preferred drug list to find out where your state stands.
How to Appeal a Denial
If your prior authorization is denied, you have the right to appeal. Many denials are overturned, particularly when the initial submission was missing documentation. Your appeal letter should include your name, policy number, the date of the denial, and the specific reason the insurer gave for denying coverage. Then address that reason directly.
The most powerful element is a letter of medical necessity from your doctor. This should explain your weight history, what treatments you’ve already tried, why the specific medication is necessary for your health, and how it connects to conditions like cardiovascular risk, sleep apnea, or diabetes. Ask your doctor to reference published treatment guidelines from organizations like the American Association of Clinical Endocrinology or the American Heart Association. Including copies of any pre-authorizations that were previously submitted and second opinions from specialists strengthens the case further.
Send your appeal by certified mail or fax and keep the transmission confirmation. You should receive acknowledgment within 7 to 10 days. If you don’t, call your insurer to confirm they received it. Keep copies of everything in one place, because some patients go through multiple rounds of appeals.
Use Manufacturer Savings Programs to Lower Costs
Even with insurance, your copay for weight loss injections can be steep. Novo Nordisk offers a savings program for Wegovy that can bring your out-of-pocket cost down to as little as $25 per month if you have eligible commercial insurance. The program also has options for people without insurance. You can find savings cards on the manufacturer’s website for both Wegovy and Zepbound.
These programs typically apply only to commercial insurance, not Medicare, Medicaid, or other government-funded plans. They also have annual caps on the total discount amount, so read the terms carefully. If your insurer covers the medication but assigns it to a high-cost specialty tier, a manufacturer copay card can make the difference between affordable and out of reach.