Insulin coverage is one of Medicare's clearest wins for seniors, thanks to the Inflation Reduction Act's $35 cap. Here is how it works in 2026.
How does Medicare cover insulin in 2026?
Medicare covers insulin through Part D for most enrollees and through Part B when insulin is used in an insulin pump. Under the Inflation Reduction Act, a one-month supply of each covered insulin product is capped at $35 or less in 2026, with no deductible applied to insulin. This $35 ceiling holds across every Part D coverage phase, so you pay no more than $35 even before meeting a deductible. The benefit applies to all Part D enrollees, including those with Extra Help, whose costs may be even lower. Call 1-800-MEDIGAP to confirm your insulin is covered.
What about insulin used in a pump?
Insulin used in an insulin pump is covered under Medicare Part B rather than Part D. Part B uses coinsurance instead of a flat copay, but in 2026 the coinsurance for insulin still cannot exceed $35 for a one-month supply. So whether your insulin runs through Part D or a Part B pump, your monthly cost for each covered insulin is held to $35 or less. If you are unsure which part of Medicare covers your insulin, a free review at 1-800-MEDIGAP can clarify your coverage and costs.