How are GLP-1 drugs affecting health plan costs?

June 16, 2026June 16, 2026

Short answer: GLP-1 medications (such as semaglutide) are among the fastest-growing costs in health plans, an estimated ~14% of 2026 drug spend, often more than $1,000 a month before rebates. Employers are deciding whether to cover them for weight loss and, if so, how to manage utilization.

GLP-1 drugs, first used for diabetes and now widely prescribed for weight loss, have become a major cost driver. Estimates put them around 14% of 2026 drug spend, with list prices over $1,000 per month before rebates and broad potential demand across the workforce.

The central employer decision is coverage scope: cover GLP-1s only for diabetes, or also for weight loss? Many plans that cover the weight-loss indication add guardrails: prior authorization, step therapy, BMI thresholds, and requirements to combine the drug with lifestyle programs, to control cost while preserving access for those who benefit most.

Sources

KFF, Mercer, and SHRM 2026 pharmacy-cost analyses; Employee Benefits KB (Coverage Mechanics, pharmacy).

Content history
Originally published: June 16, 2026
Last reviewed: June 16, 2026

Plans & Coverage Prescription Drugs

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