F90.1
BillableAttention-deficit hyperactivity disorder, predominantly hyperactive type
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is F90.1 an HCC code?
No. F90.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for F90.1
For F90.1to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed F90.1 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
F90.1 is the ICD-10-CM diagnosis code for attention-deficit hyperactivity disorder, predominantly hyperactive type. A neurodevelopmental condition characterized by excessive movement, fidgeting, and impulsive behavior, with less prominent attention difficulties. F90.1 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering behavioral and emotional disorders with onset usually occurring in childhood and adolescence (f90-f98).
F90.1 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
F90.1 does not map to any HCC in V28 or V24 models. RxHCC maps to 133 (0.000). No risk adjustment impact. Accurate subtype documentation supports stimulant medication prescribing and monitoring protocols. Coders reviewing F90.1 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC — capturing the correct specificity is the highest-leverage RAF improvement available within accurate coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F90.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document specific hyperactive and impulsive symptoms observed in clinical notes to support this subtype
- •Distinguish from combined type by confirming inattention is not the primary presenting concern
Clinical Significance
ADHD predominantly hyperactive-impulsive type is characterized by excessive motor activity, fidgetiness, talkativeness, difficulty waiting turn, and acting without thinking, without significant inattention symptoms. This presentation is more commonly identified in young children and is often the first subtype to be recognized due to its disruptive behavioral manifestations. It may evolve to combined type as inattention becomes more apparent with increasing academic demands.
Documentation Requirements
- ✓Provider documentation specifying ADHD, predominantly hyperactive-impulsive presentation/type
- ✓Evidence of six or more hyperactivity-impulsivity symptoms (adults: five or more) persisting for at least 6 months
- ✓Documentation that fewer than six inattention symptoms are present (otherwise combined type)
- ✓Evidence of symptoms in two or more settings with functional impairment
- ✓Documentation that symptoms are not better explained by another condition (mania, anxiety, oppositional defiant disorder)
Commonly Confused Codes
- •F90.0 — ADHD, predominantly inattentive type; inattentive type lacks significant hyperactivity-impulsivity
- •F90.2 — ADHD, combined type; combined type meets full criteria for both dimensions
- •F90.9 — ADHD, unspecified type; use F90.1 when predominantly hyperactive subtype is specified
- •F31.x — Bipolar disorder; hyperactivity and impulsivity during mania can mimic ADHD but is episodic, not persistent