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.
ADHD vs. ADD. Attention deficit disorder (ADD) is an older term for what's now known as ADHD. The condition was referred to as ADD until 1987, when hyperactivity was added to the name in the Diagnostic and Statistical Manual of Mental Disorders. Today, some people use the terms ADD and ADHD interchangeably.