ICD-10 F23
Billable / Specific HCC v28: 58 CCBrief psychotic disorder
About ICD-10-CM F23
ICD-10-CM code F23 represents Brief psychotic disorder. This is a billable/specific code in the Mental, Behavioral, and Neurodevelopmental chapter (block F23). The 2026 edition of ICD-10-CM F23 became effective on October 1, 2025.
Coding Tips for F23
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
F23 is a CMS-HCC v28 risk-adjustment code (category 58). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
F23 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under F23. Per CMS ICD-10-CM Tabular 2026.
- Paranoid reaction
- Psychogenic paranoid psychosis
Type 2 Excludes
Not included here, the excluded code is not part of F23, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3)
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Inpatient DRG Impact, CC
codes Brief psychotic disorder. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for F23
Local Coverage Determinations (LCDs) from CMS MACs that list F23 as a covered diagnosis.
Showing top 10 of 353 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing F23.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with F23
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert F23 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| F23 | 2983 | 10000 |
| F23 | 2984 | 10000 |
| F23 | 2988 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To F23
Other codes in section F20-F29 (Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders).
ICD-10 F23, Billing FAQ
Is ICD-10 code F23 billable? +
Yes, F23 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to F23? +
ICD-10 F23 includes: Paranoid reaction; Psychogenic paranoid psychosis.
What codes are Type 2 Excludes for F23? +
Type 2 Excludes (may be coded together when both conditions exist): mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3)
Does F23 affect Medicare Advantage HCC risk adjustment? +
Yes. F23 maps to CMS-HCC v28 category 58. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is F23 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does F23 map to? +
Per CMS GEMs, F23 maps to ICD-9 codes: 2983, 2984, 2988. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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