For purposes of this subchapter, unless the context otherwise requires:
 1. “Department” means the department of human services.
 2. “Family” means a family member and the parent or legal guardian of the family member.
 3. “Family member” means a person less than eighteen years of age who by educational determination has a moderate, severe, or profound educational disability or special health care needs or who otherwise meets the definition of developmental disability in the federal Developmental Disabilities Assistance and Bill of Rights Act, as codified in 42 U.S.C. § 15002. The department shall adopt rules establishing procedures for determining whether a child has a developmental disability.
 4. “Legal guardian” means a person appointed by a court to exercise powers over a family member.
 5. “Medical assistance” means payment of all or part of the care authorized to be provided pursuant to chapter 249A.
 6. “Parent” means a biological or adoptive parent.
 7. “Supplemental security income” means financial assistance provided to individuals pursuant to Tit. XVI of the federal Social Security Act, 42 U.S.C. § 1381 – 1383c.