GLP-1 BMI Eligibility Checker

The GLP-1 BMI Eligibility Calculator determines whether a patient meets the FDA-approved body mass index criteria for prescription of GLP-1 receptor agonist medications for weight management. The FDA has established two primary eligibility thresholds: a BMI of 30 or greater (obesity), or a BMI of 27 or greater (overweight) accompanied by at least one weight-related comorbidity such as type 2 diabetes, hypertension, dyslipidemia, or obstructive sleep apnea. These criteria were established based on the inclusion criteria of the pivotal STEP and SURMOUNT clinical trials and reflect the population in which the drugs have demonstrated safety and efficacy. BMI eligibility is the gateway to GLP-1 prescribing, insurance coverage, and clinical decision-making in obesity medicine. Without meeting these thresholds, patients generally cannot obtain a prescription for Wegovy or Zepbound for weight management, and insurance companies will deny coverage. However, it is important to understand that BMI is an imperfect screening tool that does not directly measure body fat percentage, does not account for muscle mass, and may underestimate health risk in certain ethnic populations (particularly South Asian and East Asian populations, where metabolic risk increases at lower BMI thresholds). The calculator is used by patients who want to know if they qualify before scheduling a physician appointment, by primary care providers screening patients during routine visits, by insurance prior authorization teams validating claims, and by telehealth platforms that use BMI as a first-step eligibility filter in their intake questionnaires. As GLP-1 prescribing has expanded dramatically since 2022, accurate BMI calculation and eligibility assessment have become essential clinical and administrative functions. Beyond the FDA label criteria, many insurance plans impose additional requirements such as documented prior weight loss attempts, minimum BMI thresholds higher than the FDA requirement (some plans require BMI 35 or above), and specific comorbidity documentation. This calculator checks eligibility against both the FDA criteria and common insurance coverage criteria to give patients a complete picture of their qualification status.

1. 1Enter your weight in pounds or kilograms. For the most accurate BMI calculation, use a recent weight measured on a calibrated scale under standardized conditions (morning, after voiding, minimal clothing). Your weight at a recent healthcare visit is also acceptable. Note that weight can fluctuate 2 to 5 pounds day-to-day due to hydration, sodium intake, and hormonal cycles, so a single measurement is a snapshot rather than a definitive value.
2. 2Enter your height in feet and inches or centimeters. Height should be measured standing barefoot against a wall with a stadiometer or measuring tape. Self-reported height is often overestimated by 0.5 to 1.5 inches, which can lower the calculated BMI by 0.5 to 1.5 points and potentially affect eligibility determination. If you are near a threshold (BMI 27 or 30), an accurate height measurement is particularly important.
3. 3The calculator computes your BMI using the standard formula and displays it along with the WHO classification category: underweight (below 18.5), normal weight (18.5 to 24.9), overweight (25 to 29.9), class I obesity (30 to 34.9), class II obesity (35 to 39.9), or class III obesity (40 and above). Your BMI is then compared against the FDA eligibility thresholds for GLP-1 weight management medications.
4. 4If your BMI falls between 27 and 29.9, the calculator prompts you to indicate whether you have any qualifying weight-related comorbidities. The FDA-recognized comorbidities include type 2 diabetes, hypertension requiring medication, dyslipidemia (high cholesterol or triglycerides), obstructive sleep apnea, cardiovascular disease, nonalcoholic fatty liver disease (NAFLD/NASH), and polycystic ovary syndrome (PCOS). Having at least one of these conditions makes a patient with BMI 27 to 29.9 eligible for GLP-1 prescribing.
5. 5The eligibility result is displayed with three possible outcomes: eligible (green), conditionally eligible pending comorbidity documentation (yellow), or not eligible under current criteria (red). For patients who are eligible, the calculator also shows which specific GLP-1 medications they qualify for, as some medications have slightly different labeling. Wegovy and Zepbound are FDA-approved specifically for chronic weight management, while Ozempic and Mounjaro are approved for type 2 diabetes with weight loss as a secondary benefit.
6. 6For patients near the eligibility threshold, the calculator provides additional context about insurance-specific criteria. Many commercial plans require BMI documentation from a healthcare provider (not self-reported), some require BMI to be sustained over multiple visits, and some impose higher thresholds (BMI 30 with comorbidity, or BMI 35 without). The calculator flags these potential insurance hurdles so patients can prepare documentation in advance.
7. 7The calculator also addresses the known limitations of BMI as an eligibility metric. For highly muscular individuals, BMI may overestimate body fatness and classify a lean person as overweight or obese. For older adults who have lost muscle mass with aging, BMI may underestimate body fat percentage. For patients of Asian descent, the WHO recommends considering obesity intervention at lower BMI thresholds (BMI 25 or above rather than 30). The calculator includes ethnicity-adjusted thresholds as an informational supplement to the standard FDA criteria.