Amends the Mental Health and Developmental Disabilities Code. Expands the definition of "developmental disability" to include a disability attributable to Prader-Willi syndrome. Amends the Developmental Disability and Mental Disability Services Act. Expands the definition of "severe and multiple impairments" to include a substantial disability attributable to Prader-Willi syndrome. Exempts persons diagnosed with Prader-Willi syndrome from any assessment or evaluation to measure cognitive functioning or IQ for purposes of making determinations on whether such persons have severe and multiple impairments eligible for home-based and community-based services. Amends the Mental Health and Developmental Disabilities Administrative Act. Requires the Department of Human Services to include Prader-Willi syndrome as a developmental disability in any rule defining the term "developmental disability" and in any rule listing specific medical conditions or disabilities eligible for developmental disability services provided by the Department. Amends the Statute on Statutes. Provides that, except where the context indicates otherwise: (i) in any rule, contract, or other document the term "developmental disability" shall include a disability attributable to Prader-Willi syndrome; and (ii) whenever there is a reference in any Act to "development disability" the term shall be construed to include a disability attributable to Prader-Willi syndrome.

Statutes affected:
Introduced: 5 ILCS 70/1, 20 ILCS 1705/3, 405 ILCS 5/1, 405 ILCS 80/2