Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

  1. F90 Attention-deficit hyperactivity disorders

    1. F90.0 Attention-deficit hyperactivity disorder, predominantly inattentive type

      Inclusion term(s):

      • Attention-deficit/hyperactivity disorder, predominantly inattentive presentation
    2. F90.1 Attention-deficit hyperactivity disorder, predominantly hyperactive type

      Inclusion term(s):

      • Attention-deficit/hyperactivity disorder, predominantly hyperactive impulsive presentation
    3. F90.2 Attention-deficit hyperactivity disorder, combined type

      Inclusion term(s):

      • Attention-deficit/hyperactivity disorder, combined presentation
    4. F90.8 Attention-deficit hyperactivity disorder, other type

    5. F90.9 Attention-deficit hyperactivity disorder, unspecified type

      Inclusion term(s):

      • Attention-deficit hyperactivity disorder of childhood or adolescence NOS
      • Attention-deficit hyperactivity disorder NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.