F34.81
BillableDisruptive mood dysregulation disorder
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is F34.81 an HCC code?
Yes. F34.81 maps to Major Depressive, Bipolar, and Paranoid Disorders under the V24 model but is not retained in V28.
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 F34.81
For F34.81 to 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 F34.81 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
F34.81 is the ICD-10-CM diagnosis code for disruptive mood dysregulation disorder. A condition where children have severe difficulty controlling their emotions, experiencing frequent angry outbursts and irritability that are much more intense than typical childhood mood swings. This disorder typically appears before age 10 and significantly impacts the child's ability to function at home, school, and with peers. F34.81 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering mood [affective] disorders (f30-f39).
Under the older CMS-HCC V24 model, F34.81 maps to Major Depressive, Bipolar, and Paranoid Disorders (HCC 59) with a community, non-dual, aged base RAF weight of 0.309. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Ensure documentation specifies the age of onset (typically before age 10) and frequency of mood episodes to support medical necessity. Because F34.81 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F34.81 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure documentation specifies the age of onset (typically before age 10) and frequency of mood episodes to support medical necessity
- •Do not code this diagnosis in patients over age 18, as DMDD is a childhood disorder; verify patient age before assignment
Clinical Significance
Disruptive mood dysregulation disorder (DMDD) is a childhood-onset condition characterized by severe, recurrent temper outbursts grossly out of proportion to the situation, with persistent irritable or angry mood between outbursts. It maps to HCC 59 under V24 (Major Depressive, Bipolar, and Paranoid Disorders) with a RAF weight of 0.309, reflecting the significant behavioral health resource utilization associated with this diagnosis. Accurate capture is important as DMDD was introduced in DSM-5 specifically to reduce overdiagnosis of bipolar disorder in children.
Documentation Requirements
- ✓Age of onset documented as before age 10 years
- ✓Patient must be between ages 6 and 18 at time of diagnosis
- ✓Severe temper outbursts occurring 3 or more times per week
- ✓Persistent irritable or angry mood between outbursts, present most of the day, nearly every day
- ✓Symptoms present for at least 12 months without a symptom-free period of 3 or more consecutive months
- ✓Symptoms observed in at least two of three settings (home, school, peers)
- ✓Documentation that symptoms are not better explained by another mental disorder (bipolar, oppositional defiant disorder, autism spectrum disorder)
- ✓Current treatment plan including behavioral interventions and/or pharmacotherapy