MS HB1319

Prohibits health care service plan contracts and health insurance policies covering prescription drugs issued, amended, or renewed on or after January 1, 2013, from creating specialty tiers that require percentage-based cost sharing.

Limits copayments for medications to no more than 500% of the lowest copayment required by the plan for formulary medications.

Requires plans with out-of-pocket expense limits to either include prescription drug costs in the overall out-of-pocket limit or cap prescription drug out-of-pocket expenses at $1,000 per insured or $2,000 per family per year, adjusted for inflation.

Defines copayment as a flat dollar amount paid at point of service after applicable deductibles, excluding other cost-sharing forms.

Grants the Commissioner of Insurance enforcement authority and discretion to cease enforcement if the requirements result in additional state costs under federal law.