(4) Early intervention services.--The term `early intervention services' means developmental services that--

(A) are provided under public supervision;

(B) are provided at no cost except where Federal or State law provides for a system of payments by families, including a schedule of sliding fees;

(C) are designed to meet the developmental needs of an infant or toddler with a disability, as identified by the individualized family service plan team, in any 1 or more of the following areas:

(i) physical development;

(ii) cognitive development;

(iii) communication development;

(iv) social or emotional development; or

(v) adaptive development;

(D) meet the standards of the State in which the services are provided, including the requirements of this part;

(E) include--

(i) family training, counseling, and home visits;

(ii) special instruction;

(iii) speech-language pathology and audiology services, and sign language and cued language services;

(iv) occupational therapy;

(v) physical therapy;

(vi) psychological services;

(vii) service coordination services;

(viii) medical services only for diagnostic or evaluation purposes;

(ix) early identification, screening, and assessment services;

(x) health services necessary to enable the infant or toddler to benefit from the other early intervention services;

(xi) social work services;

(xii) vision services;

(xiii) assistive technology devices and assistive technology services; and

(xiv) transportation and related costs that are necessary to enable an infant or toddler and the infant's or toddler's family to receive another service described in this paragraph;

(F) are provided by qualified personnel, including--

(i) special educators;

(ii) speech-language pathologists and audiologists;

(iii) occupational therapists;

(iv) physical therapists;

(v) psychologists;

(vi) social workers;

(vii) nurses;

(viii) registered dietitians;

(ix) family therapists;

(x) vision specialists, including ophthalmologists and optometrists;

(xi) orientation and mobility specialists; and

(xii) pediatricians and other physicians;

(G) to the maximum extent appropriate, are provided in natural environments, including the home, and community settings in which children without disabilities participate; and

(H) are provided in conformity with an individualized family service plan adopted in accordance with section 636.