Federal Definition of DD/ID:

According to the Federal “Developmental Disabilities Assistance and Bill of Rights Act of 2000”, Developmental disability —

(A). In general. — The term “developmental disability” means a severe, chronic disability of an individual that —

(i)  is attributable to a mental or physical impairment or combination of mental and physical impairment;

(ii) is manifested before the individual attains age 22;

(iii) is likely to continue indefinitely;

(iv) results in substantial functional limitations in 3 or more of the following areas of major life activity:

(I) Self-care.

(II) Receptive and expressive language.

(III) Learning.

(IV) Mobility.

(V) Self-direction.

(VI) Capacity for independent living.

(VII) Economic self-sufficiency; and

(v) reflects the individual’s need for a combination and sequency of special, interdisciplinary, or generic services, individualized supports, or other forms of assistance that are of lifelong or extended duration and are individually planned and coordinated.