F03.91 Unspecified dementia, unspecified severity, with behavioral disturbance

The ICD-10-CM code for Unspecified dementia, unspecified severity, with behavioral disturbance is F03.91 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

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

Section

F01-F09: Mental disorders due to known physiological conditions (F01-F09)

Category F03

33 codes (24 billable)

FY2026 Status

Stable since FY2024

U.S. Hospital Utilization

• An estimated 85,685 U.S. inpatient stays in 2022 included F03.91 among the documented diagnoses.
• 17,270 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)