Health benefit plans and Medicaid; require to offer coverage for biomarker testing.

HB 565, known as "Jill's Law," requires all health insurance plans in Mississippi - including Medicaid and the State and School Employees Health Insurance Plan - to cover biomarker testing for diagnosis, treatment, or monitoring of diseases when supported by medical evidence. This includes tests backed by FDA approvals, clinical guidelines, or consensus statements, effective for plans renewed or entered after July 1, 2026. Plans must provide clear written justifications for denied claims, update coverage policies publicly within 60 days of enactment, and allow appeals for coverage disputes. The law applies to all health benefit plans and aims to ensure timely access to evidence-based testing without requiring multiple biopsies.