Medicare payer. The first digit of each code is the organization that provides the funds. for the care; additional digits provide more information about the specifics of the plan or. mechanism through which these funds are provided.
Attention deficit hyperactivity disorder: A disorder in which a person is unable to control behavior due to difficulty in processing neural stimuli, accompanied by an extremely high level of motor activity.
1 ADHD (Attention-Deficit/Hyperactivity Disorder) is the term used in the current Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) diagnostic criteria.  ADD (Attention Deficit Disorder) with or without hyperactivity. is the older term from the DSM-IIIR. Thus in some older literature you will find this term as a synonym for ADHD.