Medicaid coverage; biomarker testing coverage; discretionary; effective date.

HB 3359 requires Oklahoma's Medicaid program to cover biomarker testing for Medicaid members when supported by medical evidence, such as FDA approvals, clinical guidelines, or CMS coverage policies. It directly affects Medicaid recipients needing these tests, healthcare providers ordering them, and Medicaid contractors managing coverage. Key provisions mandate that contractors cover testing at the same scope as other services, approve/deny prior authorizations within 24-72 hours, and provide clear online processes for coverage exceptions. The bill takes effect November 1, 2026, with no changes to existing Medicaid coverage standards beyond this specific requirement.