Bill No. 1555, introduced by Senator Reinhardt and Representative Pae, amends Section 1408 of Title 10 of the Oklahoma Statutes, which pertains to definitions related to Medicaid home- and community-based services. The bill modifies the definition of "individual with intellectual disability" to align with the criteria set forth in the Social Security Administration's Listing of Impairments for disability evaluation, specifically referencing 20 C.F.R., Part 404, Subpart P. Additionally, the term "resident" is clarified to refer to individuals admitted to specific institutions or those on vacation from such institutions. The definition of "developmental disability" is also updated, emphasizing the need for a combination of care and services that are planned and coordinated for individuals with severe, chronic disabilities.

Furthermore, the bill replaces the term "mentally ill" with "incompetent" in the context of developmental disabilities, ensuring that individuals whose sole disability is mental illness, as defined by Oklahoma law, are not included under this definition. The legislation also guarantees that individuals receiving services as of September 1, 1991, will remain eligible for those services, while allowing the Department of Human Services to provide programs for individuals with developmental disabilities who are not currently served. The act is set to take effect on November 1, 2026.