OK SB1306

Insurers are prohibited from modifying coverage for a prescription drug if the drug was previously preauthorized or on the formulary when prescribed, the patient has already received the drug, and the practitioner continues prescribing it

Prohibited modifications include increasing premiums, co-payments, coinsurance, or deductibles; denying coverage; moving the drug to a more restrictive tier; or substituting a generic for a brand-name drug the patient already qualified for

Insurers may still modify coverage if the FDA issues a safety concern or the manufacturer notifies the FDA of a discontinuance or potential discontinuance

Violating insurers face civil penalties in amounts to be determined by the Insurance Commissioner, who must promulgate rules to implement the law

Effective date: November 1, 2026