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.
Attention-Deficit Hyperactivity Disorder (ADHD) appears related to two neurotransmitters - Dopamine and Norepinephrine. Neurotransmitters are used by the brain to stimulate or repress stimulation in brain cells. To pay proper attention, the brain must be adequately stimulated.