MO SB122

Prohibits health maintenance organizations (HMOs) and health carriers from requiring enrollees to pay co-payments exceeding the usual and customary retail price of prescription drugs, with enrollees paying only the lower amount.

Requires HMOs to apply uniform coinsurance, co-payment, and deductible factors to all participating pharmacy providers that meet the contract's product cost requirements, though different tiers may apply between generic and brand name drugs.

Prevents HMOs from mandating changes to an enrollee's maintenance drug (prescribed for more than 30 days) without written consent of both the provider and enrollee, with violators subject to liability for resulting damages.

Mandates all health carriers implement a web-based estimating system by July 1, 2012, allowing individuals to receive cost and out-of-pocket estimates for procedures, tests, and services across all contracted providers and facilities.

Requires HMOs to contract only with pharmacies and drug distributors licensed by the Missouri board of pharmacy, and prohibits quantity limits on prescriptions unless applied uniformly across all network providers.