F20.9 ICD-10-CM Code: Schizophrenia, unspecified
F20.9 maps to CMS-HCC V28 151 (RAF 0.511). Documentation must support MEAT. MEAT criteria · RAF calculator · HCC coding software
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FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29)
F20.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceSchizophrenia, unspecified
A diagnosis of schizophrenia when the specific type or subtype cannot be determined or is not specified in the clinical documentation.
Buddy Insight
Schizophrenia, unspecified is used when a patient has a documented diagnosis of schizophrenia but the specific subtype has not been determined or documented.
CMS-HCC V28
MappedHCC 151
RAF 0.511
CMS-HCC V24
MappedHCC 57
RAF 0.524
ACA/HHS
MappedHCC 87.1
Varies by metal level
ESRD/PACE
MappedHCC 57
RAF 0.111
RXHCC
MappedHCC 130
RAF 0.240
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for F20.9 in this effective period.
Excludes 2
Official- schizophrenic reaction in:
- alcoholism (F10.15-, F10.25-, F10.95-)
- brain disease (F06.2)
- epilepsy (F06.2)
- psychoactive drug use (F11-F19 with .15. .25, .95)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for F20.9 in this effective period.
Excludes 1
Official- brief psychotic disorder (F23)
- cyclic schizophrenia (F25.0)
- mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3)
- schizoaffective disorder (F25.-)
- schizophrenic reaction NOS (F23)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for F20.9 in this effective period.
Use Additional
Official- code, if applicable, to identify:
- other specified cognitive deficit (R41.84-)
Code Also
OfficialICD-10-CM does not list Code Also instructions for F20.9 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is F20.9 an HCC code?
Yes. F20.9 (Schizophrenia, unspecified) maps to Schizophrenia under the CMS-HCC V28 risk adjustment model (and Schizophrenia under V24), with a community non-dual aged RAF of 0.511. It is billable for payment year 2026.
Coder answer: F20.9 is billable and maps to V28 HCC 151, Schizophrenia. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- F20.9
- Description
- Schizophrenia, unspecified
- HCC (V28)
- HCC 151 — Schizophrenia
- RAF
- 0.511
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. 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.
Work F20.9 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for F20.9
For F20.9 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 F20.9 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
F20.9 is the ICD-10-CM diagnosis code for schizophrenia, unspecified. A diagnosis of schizophrenia when the specific type or subtype cannot be determined or is not specified in the clinical documentation. F20.9 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (f20-f29).
Under the CMS-HCC V28 risk adjustment model, F20.9 maps to Schizophrenia (HCC 151) with a community, non-dual, aged base RAF weight of 0.511. Under the older V24 model, F20.9 mapped to the same category but with a base RAF weight of 0.524, V28 recalibrated weights across the entire model. 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.
Schizophrenia, unspecified, provider documents schizophrenia without specifying subtype. The most commonly used schizophrenia code in general practice. Because F20.9 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 F20.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Schizophrenia, unspecified, provider documents schizophrenia without specifying subtype. The most commonly used schizophrenia code in general practice.
- •Query for subtype when documentation permits. Unspecified is defensible when the provider uses general 'schizophrenia' language without detailed subtype descriptors.
- •V28 HCC 151 at RAF 0.511. A high-coefficient mental-health HCC in the V28 model; accurate annual documentation is critical.
Clinical Significance
Schizophrenia, unspecified is used when a patient has a documented diagnosis of schizophrenia but the specific subtype has not been determined or documented. While it captures the same high-value HCC as specified subtypes, this code represents a documentation gap. Provider education on documenting schizophrenia subtypes can improve clinical data quality. Despite being unspecified, this code reflects a severe, chronic mental illness requiring extensive ongoing treatment.
Documentation Requirements
- ✓Documented diagnosis of schizophrenia by a qualified mental health professional
- ✓Assessment of current symptoms and functional status
- ✓Current medication regimen (antipsychotic medications)
- ✓Treatment compliance assessment
- ✓Attempt to determine the specific subtype through provider query
- ✓Functional impact on daily activities, social, and occupational functioning
Commonly Confused Codes
- •F20.0: Paranoid schizophrenia; query provider if paranoid features are present
- •F20.1: Disorganized schizophrenia; query provider if disorganized features predominate
- •F20.3: Undifferentiated schizophrenia; use when assessed but no subtype predominates
- •F29: Unspecified psychosis is a DIFFERENT diagnosis: it does not confirm schizophrenia
- •F25.9: Schizoaffective disorder, unspecified involves mood episodes in addition to psychosis