F90.9Attention-deficit hyperactivity disorder, unspecified type

F90.9 is the ICD-10-CM diagnosis code for Attention-deficit hyperactivity disorder, unspecified type. It belongs to category F90 (Attention-deficit hyperactivity disorders), block F90-F98 (behavioral and emotional disorders with onset usually occurring in childhood and adolescence) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F90, choose F90.9 (unspecified type) only when documentation doesn't support a more specific option: predominantly inattentive type (F90.0), predominantly hyperactive type (F90.1), combined type (F90.2) and other type (F90.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 886 (Behavioral and Developmental Disorders, relative weight 1.8678), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 314.00 (attention deficit disorder without mention of hyperactivity), 314.01 (attention deficit disorder with hyperactivity) and 314.9 (unspecified hyperkinetic syndrome).