ICD-10-CM 2027
ICD-10 code for ADHD (attention-deficit hyperactivity disorder)
Confirmed by the official ICD-10-CM index entry “disorder (of) › attention-deficit hyperactivity (adolescent) (adult) (child)”. Page updated September 29, 2026.
About coding ADHD
The ICD-10-CM code for ADHD (attention-deficit hyperactivity disorder) is F90.9 (Attention-deficit hyperactivity disorder, unspecified type). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F90.9.
It is also searched as ADD.
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.
Related ADHD codes
Common questions about ADHD ICD-10 codes
What is the ICD-10 code for ADHD?
- F90.9 — Attention-deficit hyperactivity disorder, unspecified type. More specific codes apply when the documentation supports them: F90.0, F90.1, F90.2, F90.8.
What is the ICD-10 code for attention-deficit hyperactivity disorder, predominantly inattentive type?
- F90.0 — Attention-deficit hyperactivity disorder, predominantly inattentive type.
What is the ICD-10 code for attention-deficit hyperactivity disorder, predominantly hyperactive type?
- F90.1 — Attention-deficit hyperactivity disorder, predominantly hyperactive type.
What is the ICD-10 code for attention-deficit hyperactivity disorder, combined type?
- F90.2 — Attention-deficit hyperactivity disorder, combined type.
What is the ICD-10 code for attention-deficit hyperactivity disorder, other type?
- F90.8 — Attention-deficit hyperactivity disorder, other type.
Is F90.9 billable?
- Yes. F90.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F90.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F90.9 as a principal diagnosis.
Is F90.9 a CC or MCC?
- No. F90.9 is neither a CC nor an MCC under MS-DRG v44.0.