F20.5 Residual schizophrenia

The ICD-10-CM code for Residual schizophrenia is F20.5 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

Section

F20-F29: Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29)

Category F20

10 codes (8 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F20.5:

• Restzustand (schizophrenic)
• Schizophrenia, schizophrenic › negative type
• Residual › state, schizophrenic
• Schizophrenia, schizophrenic › restzustand
• Schizophrenia, schizophrenic › residual (state) (type)
• State (of) › residual schizophrenic

Inclusion Terms

• Restzustand (schizophrenic)
• Schizophrenic residual state

U.S. Hospital Utilization

• An estimated 830 U.S. inpatient stays in 2023 included F20.5 among the documented diagnoses.
• 270 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Pain disorders related to psychological factors (TOC entry)

a. Pain disorders related to psychological factors ..................................................................... 43

Psychoactive substance use disorders (TOC entry)

b. Mental and behavioral disorders due to psychoactive substance use ................................... 43

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)