Health insurance; carrier contracts; required provisions regarding prior authorization for prescription drugs. Amends existing required provisions for health carrier contracts related to prior authorizations for prescription drugs. Current law requires that if prior authorization is approved for prescription drugs and such prescription drugs have been scheduled, provided, or delivered to the patient consistent with the authorization, health carriers may not revoke, limit, condition, modify, or restrict that authorization except in certain circumstances. The bill requires this limitation on carriers to apply for a minimum of six months for initial authorizations and a minimum of 12 months for continued authorizations. The bill adds circumstances under which a prior authorization may be revoked, limited, conditioned, modified, or restricted by a carrier, including (i) a final action by the U.S. Food and Drug Administration, other regulatory agencies, or the manufacturer communicating a patient efficacy issue that would affect the authorization and (ii) when additional safety monitoring is recommended by the U.S. Food and Drug Administration, other regulatory agencies, or the manufacturer.