There is no single combined ICD-10 code for ADHD with anxiety. Bill the ADHD code (F90.0, F90.1, F90.2, or F90.9) and the anxiety code (most often F41.1 for generalized anxiety disorder) together, listing the primary focus of treatment first.
Quick Reference: ADHD With Anxiety Code Pairings
ADHD and anxiety are coded as two separate diagnoses reported together. The most common pairings, using ADHD combined type as the example, are:
| Code Pairing | Description | Notes |
|---|---|---|
| F90.2 + F41.1 | ADHD (combined type) with generalized anxiety disorder | The most common ADHD-plus-anxiety pairing |
| F90.2 + F40.10 | ADHD (combined type) with social anxiety disorder | Use when anxiety centers on social evaluation |
| F90.2 + F41.9 | ADHD (combined type) with unspecified anxiety | Placeholder only; specify the anxiety code when able |
Choose the ADHD code that matches the presentation rather than defaulting to combined type:
| Code | Description | Notes |
|---|---|---|
| F90.0 | ADHD, predominantly inattentive type | Inattention predominates |
| F90.1 | ADHD, predominantly hyperactive type | Hyperactivity and impulsivity predominate |
| F90.2 | ADHD, combined type | Both inattentive and hyperactive-impulsive features |
| F90.9 | ADHD, unspecified type | Temporary placeholder only |
There is no combined ADHD-plus-anxiety code. Do not search for one. Report the specific ADHD code and the specific anxiety code as two diagnoses on the claim, and sequence the primary focus of treatment first.
Why ADHD and Anxiety Co-occur
Anxiety is one of the most common companions to ADHD. Anxiety disorders co-occur in roughly 30% of ADHD cases, which is well above the base rate in the general population. That overlap is why so many claims carry both diagnoses.
The relationship runs in both directions. Chronic difficulty meeting demands at school or work can generate real, ongoing worry, and anxiety in turn worsens the concentration problems that ADHD already produces. Because the two feed each other, treating only one and coding only one often understates the clinical picture. When both disorders are genuinely present and being addressed, both belong on the claim.
How to Code Both
There is no single combined code, so you bill the ADHD diagnosis and the anxiety diagnosis together. Two rules govern the pairing:
- Sequence the primary focus of treatment first. If the encounter centers on inattention and impulsivity, list the ADHD code (for example F90.2) first. If anxiety is the main reason for the visit, list the anxiety code (for example F41.1) first. The order should reflect what you actually worked on.
- Document how each condition is addressed. The record should show that both diagnoses received clinical attention, so the pairing supports medical necessity rather than looking like a redundant add-on code.
Use the specific codes on both sides. Pick the ADHD type (F90.0, F90.1, F90.2, or F90.9) that matches the presentation, and pick the specific anxiety code (most often F41.1, or F40.10 for social anxiety) rather than falling back on F41.9 unspecified.
Billing note: the sequence can change from visit to visit as the focus of treatment shifts. Sequencing anxiety first one session and ADHD first the next is appropriate when the encounters genuinely differ in focus, as long as the documentation matches.
Telling Them Apart
The trickiest part of coding this pair is deciding whether a symptom belongs to ADHD, to anxiety, or to both. Restlessness and poor concentration show up in both, so the differential rests on onset, pervasiveness, and the content of the worry:
- ADHD (F90.x): restlessness and inattention that are present across settings, not tied to a specific worry, with symptom onset before age 12. The inattention is there whether or not the person is worried about anything.
- Anxiety (F41.1 and related): concentration problems that are driven by apprehension and track with worry about specific concerns. These can begin at any age and ease when the worry eases.
When the restlessness is pervasive and long-standing, it points to ADHD. When it rises and falls with content-specific worry, it points to anxiety. When both patterns are genuinely present, code both (for example F90.2 plus F41.1) rather than forcing a choice.
Documentation
Documentation for an ADHD-plus-anxiety claim should make both diagnoses defensible on their own:
ADHD onset and pervasiveness: evidence of inattentive or hyperactive-impulsive symptoms before age 12 and across more than one setting, such as home and school or work.
Anxiety presentation: the content and course of the worry, and whether it is generalized (F41.1), social (F40.10), or another specific presentation.
Differential reasoning: a brief note on why the concentration difficulty is being attributed to ADHD, to anxiety, or to both, using onset, pervasiveness, and worry content.
Primary focus of treatment: which diagnosis drove the encounter, so the sequencing on the claim is supported.
How each is addressed: the interventions targeting ADHD and the interventions targeting anxiety, so both codes reflect delivered care.
Frequently Asked Questions
- What is the ICD-10 code for ADHD with anxiety?
- There is no single combined code for ADHD with anxiety. You bill both diagnoses, for example F90.2 (ADHD, combined type) plus F41.1 (generalized anxiety disorder). Choose the specific ADHD code that matches the presentation (F90.0, F90.1, F90.2, or F90.9) and the specific anxiety code, then list the primary focus of treatment first.
- Can I bill ADHD and anxiety on the same claim?
- Yes. ADHD and a comorbid anxiety disorder are distinct diagnoses and can be reported together on the same claim. List the primary focus of treatment first, then the secondary diagnosis, and document how each condition is being addressed so the pairing supports medical necessity.
- Which do I list first, ADHD or anxiety?
- List the primary focus of treatment first. If the visit centers on managing inattention and impulsivity, sequence the ADHD code (for example F90.2) first. If anxiety is the main reason for the encounter, sequence the anxiety code (for example F41.1) first. The sequence should reflect what you actually worked on that session.
- Is the restlessness ADHD or anxiety?
- Differentiate by onset, pervasiveness, and the content of the worry. ADHD restlessness and inattention are present across settings with symptom onset before age 12 and are not tied to a specific worry. Anxiety-driven concentration problems track with apprehension and worry about specific concerns and can begin at any age. When both patterns are genuinely present, code both rather than choosing one.
- Which anxiety code do I pair with ADHD?
- Most often F41.1 (generalized anxiety disorder), because diffuse worry is the anxiety presentation that most commonly accompanies ADHD. Use F40.10 when the anxiety is specifically social, and F41.9 (anxiety disorder, unspecified) only as a temporary placeholder before you have characterized the anxiety presentation.
Accurate coding here comes down to one rule: there is no combined code, so bill the specific ADHD code and the specific anxiety code together, sequence the primary focus of treatment first, and document how each condition was addressed.