F31.63
BillableBipolar disorder, current episode mixed, severe, without psychotic features
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is F31.63 an HCC code?
Yes. F31.63 maps to Bipolar Disorders without Psychosis under the CMS-HCC V28 risk adjustment model (and Major Depressive, Bipolar, and Paranoid Disorders under V24).
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 F31.63
For F31.63to 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 F31.63 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
F31.63 is the ICD-10-CM diagnosis code for bipolar disorder, current episode mixed, severe, without psychotic features. Bipolar disorder with a severe mixed episode combining manic and depressive symptoms without psychotic features. F31.63 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 CMS-HCC V28 risk adjustment model, F31.63 maps to Bipolar Disorders without Psychosis (HCC 154) with a community, non-dual, aged base RAF weight of 0.351. Under the older CMS-HCC V24 model, F31.63 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.
Confirm severe severity and mixed episode presentation without psychotic symptoms in documentation. Because F31.63 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 F31.63 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm severe severity and mixed episode presentation without psychotic symptoms in documentation
- •Use F31.64 instead if psychotic features are documented
Clinical Significance
Bipolar disorder with current severe mixed episode without psychotic features is among the most dangerous bipolar presentations, combining the energy and impulsivity of mania with the despair and suicidality of depression. These patients are at the highest risk for suicide attempts due to the combination of depressive hopelessness and manic disinhibition. Intensive treatment is almost always required.
Documentation Requirements
- ✓Confirmed bipolar disorder diagnosis
- ✓Concurrent severe manic and depressive symptoms documented
- ✓Explicit absence of psychotic features
- ✓Comprehensive suicide risk assessment and safety planning
- ✓Evidence of marked functional impairment
- ✓Intensive treatment plan including medication management and possibly hospitalization
Commonly Confused Codes
- •F31.64 — Bipolar disorder, mixed, severe with psychotic features: Requires documented psychotic symptoms
- •F31.62 — Bipolar disorder, mixed, moderate: Less severe presentation
- •F31.13 — Bipolar disorder, manic, severe without psychotic features: Pure manic episode
- •F31.4 — Bipolar disorder, depressed, severe without psychotic features: Pure depressive episode