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

F90.9

ICD-10 Chapter 5: Mental, Behavioral & Neurodevelopmental — illustrative image — Chapter 5: Mental, behavioral and neurodevelopmental disorders (F01–F99) — illustrative image

What this code means

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental condition of inattention and/or hyperactivity and impulsivity.

Also called: adhd, attention deficit hyperactivity disorder.

When this code is used

Used for ADHD when the type is not specified.

Where it sits in ICD-10-CM

Code F90.9 belongs to Chapter 5: Mental, behavioral and neurodevelopmental disorders, which covers codes F01–F99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Watch: related videos

▶ WatchAttention deficit hyperactivity disorder adhd ▶ WatchAttention deficit hyperactivity disorder ▶ WatchAttention deficit hyperactivity disorder

Frequently asked questions

What is ICD-10-CM code F90.9?

F90.9 is the ICD-10-CM diagnosis code for “Attention-deficit hyperactivity disorder, unspecified type”. Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental condition of inattention and/or hyperactivity and impulsivity.

When is code F90.9 used?

Used for ADHD when the type is not specified. It belongs to Chapter 5 of ICD-10-CM (Mental, behavioral and neurodevelopmental disorders).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.