2027 ICD-10-CM Diagnosis Code F24Shared psychotic disorder

ICD-10-CM Codes›F01–F99›F20-F29›F24

ICD-10-CM F24
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F24 is a billable ICD-10-CM diagnosis code for shared psychotic disorder. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 885. Coders also document this condition as folie à trois. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Schizophrenia spectrum and other psychotic disorders.

For Medicare Advantage risk adjustment, F24 maps to CMS-HCC Category 152 (Psychosis, Except Schizophrenia) under the V28 model, adding a risk factor of about 0.484 for a community, non-dual, aged beneficiary in payment year 2027.

Code Identity

ICD-10-CM Code
F24
Billable Status
Yes — Valid for Submission
Code Describes
Shared psychotic disorder
Short Description
Shared psychotic disorder
Same as the full description in the CMS dataset.
Chapter
F20-F29
Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF20-F29Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders
CategoryF24Shared psychotic disorder
This CodeF24Shared psychotic disorder

Medicare Risk Adjustment (HCC)Billing

F24 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.

CMS-HCC V28 Category (Payment Model)
HCC 152— Psychosis, Except Schizophrenia
Payment HCC · PY 2027 one of 12 ICD-10-CM codes in this category
Risk Adjustment Factor (RAF) Weight
+0.484
community, non-dual, aged · ranges 0.208–0.579 across segments
Hierarchy
Superseded by HCC 151
a more severe related category takes the payment when both are reported
Prior Model (CMS-HCC V24)
HCC 59
V24 retired V28 pays 100% of MA risk scores since PY 2026
Other CMS Models
PACE (CMS-HCC V22): HCC 58 · ESRD (V21): HCC 58 · ESRD (V24): HCC 59
ESRD V21 weights: 0.091 dialysis, 0.217–0.260 functioning graft · ESRD V24 weights: 0.066 dialysis, 0.129–0.259 functioning graft
Part D (RxHCC)
RxHCC 133 — Anxiety and Other Psychiatric Disorders
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Folie à trois
  • Induced psychotic disorder

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F24: its own notes plus those printed at Chapter 5. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Folie à deux
  • Induced paranoid disorder
  • Induced psychotic disorder

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F24, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming F24: they are not reported together with it, unless the two conditions are unrelated.

  • F53 Mental and behavioral disorders associated with the puerperium, not elsewhere classified
    psychosis in schizophrenia, schizotypal, delusional, and other psychotic disorders (F20-F29) names F20-F29, which includes this code
  • R44 Other symptoms and signs involving general sensations and perceptions
    hallucinations in schizophrenia, schizotypal and delusional disorders (F20-F29) names F20-F29, which includes this code
  • R46 Symptoms and signs involving appearance and behavior
    appearance and behavior in schizophrenia, schizotypal and delusional disorders (F20-F29) names F20-F29, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD001
Schizophrenia spectrum and other psychotic disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Shared Paranoid Disorder

    a condition in which closely related persons, usually in the same family, share the same delusions.

Patient EducationClinical

Psychotic Disorders

Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations. Delusions are false beliefs, such as thinking that someone is plotting against you or that the TV is sending you secret messages.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F24 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
297.3 Shared psychotic disord
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F24Overview

What is the ICD-10 code for shared psychotic disorder?

The ICD-10-CM code for shared psychotic disorder is F24. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is F24 (Shared psychotic disorder) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report shared psychotic disorder on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F24 group to?

When shared psychotic disorder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 885 (psychoses), which carries a relative weight of 1.3904. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F24?

Under the General Equivalence Mappings, shared psychotic disorder converts to ICD-9-CM 297.3 (shared psychotic disord). The mapping is a direct match.

What HCC is F24?

F24 (shared psychotic disorder) maps to CMS-HCC Category 152 (Psychosis, Except Schizophrenia), commonly written as HCC 152, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 59 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 133.

Does F24 risk-adjust for Medicare Advantage payment?

Yes. When documented and reported on a Medicare Advantage encounter, F24 adds a risk adjustment factor of about 0.484 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.208 to 0.579 depending on the payment segment). A more severe related category (HCC 151) supersedes it when both are reported. See the full factor table on the HCC 152 category page.