ICD-10-CM F90.9
ICD-10 Code F90.9: ADHD, unspecified type
F90.9 is the ICD-10-CM code for attention-deficit hyperactivity disorder, unspecified type. DSM-5-TR uses it for unspecified ADHD.
- Official description
- Attention-deficit hyperactivity disorder, unspecified type
- Billable
- Yes
- Parent category
- F90 · Attention-deficit hyperactivity disorders
- DSM-5-TR name
- Unspecified attention-deficit/hyperactivity disorder
Verified against the FY2027 ICD-10-CM code set (CDC/NCHS and CMS), effective October 1, 2026 - September 30, 2027, on . Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99).
Coding notes for F90.9
- Use when the presentation has not been specified
- Other specified ADHD is F90.8
- Move to F90.0, F90.1, or F90.2 once the presentation is clear
What to document for medical necessity
Payers look for a record that supports the diagnosis and the level of care. For adhd that usually means:
- The current presentation and the symptoms that support it
- Evidence the symptoms show up in more than one setting, such as home and school or work
- Rating scales or collateral reports from parents, teachers, or partners
- Functional impairment the symptoms cause
- Treatment plan goals and any coordination with a prescriber
CPT codes often billed with F90.9
The ICD-10 code says why you are treating the client and the CPT code says what you did. These are the service codes most often paired with F90.9:
Free templates for this diagnosis
Related ICD-10 codes
Frequently asked questions
Is F90.9 billable?
Yes. It is billable, though a presentation-specific code is more informative when you have one.
What is the difference between F90.8 and F90.9?
F90.8 is other type, where you specify why criteria are not fully met. F90.9 is unspecified type.
This page is a coding reference, not clinical, diagnostic, billing, or legal advice. The diagnosis is the treating clinician's call, and payer rules vary - always confirm against the current ICD-10-CM code set and official guidelines and your payer's policy. See the full mental health ICD-10 code list.