Ending Pricey Insulin Act or the EPI Act This bill establishes a maximum out-of-pocket cost of $50 for a 30-day supply of insulin. Specifically, no private or public health insurance plan may charge an enrollee more than $50 for a 30-day supply of insulin, regardless of the amount of insulin prescribed for that period. This includes any deductible, co-payment, coinsurance, or other cost-sharing requirement. This $50 limit also applies to the cash price for insulin prescriptions for uninsured individuals. The requirements of this bill apply beginning on January 1, 2022, irrespective of the date this bill is enacted.