ICD-10 Codes for ADHD: F90.0, F90.1, F90.2
Codes verified against the CMS FY2027 ICD-10-CM code descriptions (effective October 1, 2026; these codes are unchanged from FY2026). Reviewed . See sources.
What is the ICD-10 code for ADHD?
ADHD is coded in category F90. F90.0 is the predominantly inattentive type, F90.1 the predominantly hyperactive type, and F90.2 the combined type. F90.8 is other type and F90.9 is unspecified type (ADHD NOS). All five are billable; F90 itself is a category heading. The code should match the presentation the clinician documents.
The F90 codes line up with the three ADHD presentations clinicians document. The FY2027 tabular list makes that explicit: each code carries an inclusion term with the presentation wording, such as "Attention-deficit/hyperactivity disorder, combined presentation" under F90.2.
Below are the five billable codes with their official descriptions, the Excludes2 notes that matter when ADHD occurs with anxiety, mood or autism diagnoses, and the documentation that supports the code in a session note.
F90 ADHD codes
| Code | Official description (FY2027) | Billable | When it fits |
|---|---|---|---|
| F90 | Attention-deficit hyperactivity disorders | No (header) | Category only. |
| F90.0 | Attention-deficit hyperactivity disorder, predominantly inattentive type | Yes | Inclusion term: ADHD, predominantly inattentive presentation. |
| F90.1 | Attention-deficit hyperactivity disorder, predominantly hyperactive type | Yes | Inclusion term: ADHD, predominantly hyperactive impulsive presentation. |
| F90.2 | Attention-deficit hyperactivity disorder, combined type | Yes | Inclusion term: ADHD, combined presentation. |
| F90.8 | Attention-deficit hyperactivity disorder, other type | Yes | Other documented type. |
| F90.9 | Attention-deficit hyperactivity disorder, unspecified type | Yes | Inclusion terms: ADHD NOS; ADHD of childhood or adolescence NOS. |
How do you choose between F90.0, F90.1 and F90.2?
Use the presentation stated in the clinician's diagnosis. Predominantly inattentive is F90.0, predominantly hyperactive impulsive is F90.1, and combined is F90.2. When ADHD is diagnosed but the presentation is not recorded, F90.9 applies, since "Attention-deficit hyperactivity disorder NOS" is its inclusion term.
ICD-10-CM has no separate code for ADHD in adults. The same F90 codes apply at any age; the F90.9 inclusion term for "childhood or adolescence NOS" does not limit the other codes to children.
Can ADHD be coded with anxiety, depression or autism?
Yes, when each condition is documented. Category F90 has an Excludes2 note for anxiety disorders (F40.-, F41.-), mood disorders (F30-F39), pervasive developmental disorders (F84.-) and schizophrenia (F20.-). The FY2027 Official Guidelines define Excludes2 as "not included here", meaning the client may have both conditions and both codes may be reported together.
| Code | Official description (FY2027) | Billable | When it fits |
|---|---|---|---|
| F84.0 | Autistic disorder | Yes | Inclusion term: autism spectrum disorder. |
| F41.1 | Generalized anxiety disorder | Yes | See the anxiety codes. |
| F91.3 | Oppositional defiant disorder | Yes | Documented ODD. |
| R41.840 | Attention and concentration deficit | Yes | A symptom code for attention problems when no diagnosis has been confirmed. |
| Z55.3 | Underachievement in school | Yes | A social determinant code; report as a secondary diagnosis only. See the Z code guide. |
What if ADHD is suspected but not yet diagnosed?
Outpatient guidelines (FY2027 Section IV.H) do not allow coding "rule out ADHD" or "probable ADHD". Code what is certain at that visit, such as the presenting symptoms. R41.840, Attention and concentration deficit, is a billable symptom code that can describe attention problems while an evaluation is in progress. Once the clinician confirms the diagnosis, switch to the matching F90 code.
Rating scales used during the evaluation may be reported with CPT 96127, and the diagnostic interview itself with CPT 90791, subject to payer rules.
How should ADHD show up in each session note?
A reviewer reading a single note should be able to see why the F90 code is on the claim. That means the note names the presentation, describes the symptoms that were the focus of the session, and ties the intervention to them. "Worked on organization" is thin; "Practiced a two-step homework checklist to address missed assignments (inattentive symptoms); client completed both steps with one prompt" shows the link between diagnosis, intervention and response.
Sessions with parents or teachers need the same thread. Record who attended, what information they reported, and how it changes the plan. When a parent session happens without the child, the note should say so, because it changes the CPT code (90846 rather than 90847).
Example assessment line for a SOAP note: "ADHD, combined presentation (F90.2). Impulsive interruptions decreased from daily to twice this week per parent report; inattention at school remains the main barrier to goal 2." Keep the code in the assessment consistent with the claim, and update both if the clinician revises the presentation after re-evaluation.
Which CPT codes are billed with ADHD diagnoses?
What should the session note show?
- The diagnosis with its presentation (inattentive, hyperactive impulsive, or combined), matching F90.0, F90.1 or F90.2.
- Current symptoms and where they show up: home, school, or work.
- Rating scale results with the instrument, informant, and date.
- Coexisting conditions that are being treated, each documented in its own right.
- Interventions such as organization skills, behavioral parent training, or classroom strategies, and the client's or family's response. The child and family therapy notes template covers multi-informant sessions.
Common mistakes
- Reporting F90 without a fourth character.
- Using F90.9 after the evaluation has documented a specific presentation.
- Coding "rule out ADHD" as an F90 code on an outpatient claim.
- Assuming ADHD cannot be coded with anxiety or autism. The F90 Excludes2 note allows both when documented.
Frequently Asked Questions
What is the ICD-10 code for ADHD combined type?
F90.2, Attention-deficit hyperactivity disorder, combined type. Its FY2027 inclusion term is "Attention-deficit/hyperactivity disorder, combined presentation". It is billable.
What is F90.9?
F90.9 is attention-deficit hyperactivity disorder, unspecified type. It is billable and is the code for ADHD NOS when the presentation is not documented.
Is there a separate ICD-10 code for adult ADHD?
No. ICD-10-CM uses the same F90 codes for adults and children. Choose the code from the documented presentation.
Can ADHD and autism be coded together?
Yes. Category F90 has an Excludes2 note for pervasive developmental disorders (F84.-). Excludes2 allows both codes when the client has both documented conditions.
What is the difference between F90.0 and F90.2?
F90.0 is the predominantly inattentive type and F90.2 is the combined type. Use the one that matches the presentation the clinician documents; F90.2 applies when both inattentive and hyperactive impulsive symptoms define the presentation.
What code is used for ADD without hyperactivity?
F90.0, the predominantly inattentive type, when the clinician documents that presentation. The FY2027 tabular list does not have a separate code named ADD.
Related references
Sources
- CMS: FY2027 ICD-10-CM code descriptions in tabular order (zip)
- CMS: FY2027 ICD-10-CM code tables, tabular and index (zip)
- CMS and NCHS: ICD-10-CM Official Guidelines for Coding and Reporting, FY2027 (PDF)
- CMS: ICD-10 code files (FY2027 and FY2026 ICD-10-CM)
- CDC NCHS: ICD-10-CM and the ICD-10-CM Browser Tool
Payer rules vary. Confirm diagnosis, coverage, modifier, and documentation rules with each payer before billing. This page is general education, not billing, coding, or legal advice. The diagnosis is the treating clinician's decision.
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