TennCare - As enacted, enacts "Lucca's Law," which addresses TennCare coverage of treatment for pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS) and pediatric acute-onset neuropsychiatric syndrome (PANS). - Amends TCA Title 8; Title 56 and Title 71.

SB 1426, known as "Lucca's Law," requires TennCare managed care plans to cover medically necessary treatments for children diagnosed with PANDAS (pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections) and PANS (pediatric acute-onset neuropsychiatric syndrome). It mandates coverage for antibiotics, behavioral therapies, immune-modulating drugs, plasma exchange, and IV immunoglobulin therapy, with no higher copays or deductibles than other similar treatments. The law also prohibits denying or delaying coverage based on prior treatment history or different diagnostic labels, and requires coverage to be provided without lifetime limits. This applies to all TennCare managed care organizations starting January 1, 2026, and specifies that PANDAS/PANS must be coded as autoimmune encephalitis until new medical codes are established.