Attention-deficit hyperactivity disorder, other type

This code represents a diagnosis of Attention-Deficit Hyperactivity Disorder (ADHD) that does not fit the criteria for predominantly inattentive, predominantly hyperactive-impulsive, or combined presentation. It is used when the specific presentation of ADHD is atypical or when there is insufficient information to classify it into one of the more common subtypes. This can include presentations with unusual symptom profiles or those that partially meet criteria for multiple types without fully meeting any single one.

Use this code when a clinician explicitly diagnoses "other specified ADHD" or "ADHD, other type" based on a comprehensive diagnostic evaluation. This typically occurs when a patient exhibits core ADHD symptoms (inattention and/or hyperactivity-impulsivity) but the symptom pattern doesn't clearly align with the established predominant presentations. Documentation should clearly state the "other" nature of the ADHD or describe the atypical symptom profile that precludes a more specific diagnosis.

• Avoid using this code as a default or "unspecified" option; F90.9 (unspecified ADHD) should be used if the type is truly unknown.
• Ensure the medical record explicitly supports an "other specified" diagnosis, detailing why the more common subtypes are not appropriate.
• Consider sequencing this code as a primary diagnosis when it is the main reason for the encounter, or as a secondary diagnosis if another condition is the primary focus but ADHD is also being managed.