AZ SB1590

Prohibits hospital service corporations, medical service corporations, health care services organizations, group disability insurers, and blanket disability insurers from excluding or denying coverage based solely on autism spectrum disorder diagnosis.

Requires coverage for medically necessary behavioral therapy services (including applied behavior analysis, discrete trial training, pivotal response training, and early intensive behavioral intervention) provided or supervised by licensed or certified providers.

Exempts individual and small employer policies, limited benefit coverage, and services provided outside Arizona from the coverage requirements.

Allows insurers to impose deductibles, coinsurance, and other cost-sharing provisions related to autism spectrum disorder coverage.

Defines autism spectrum disorder as a pervasive developmental disorder meeting criteria in the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders.