Pennsylvania Gov. Edward Rendell, D, has signed H.B. 1150, an autism spectrum disorder benefits law.

The new law will require private insurers to cover medically necessary treatments for individuals with autism spectrum disorders up to age 21, officials say.

Under the law, insurers must pay up to $36,000 per year per patient for medically necessary autism spectrum disorder treatments.

Covered services include psychiatric care, psychological care, rehabilitative care including applied behavioral analysis, therapeutic care and pharmacy care, officials say.