F04 Amnestic disorder due to known physiological condition

The ICD-10-CM code for Amnestic disorder due to known physiological condition is F04 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

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

Category F04

1 code (1 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F04:

• Meynert's amentia (nonalcoholic)
• Toxemica cerebropathia psychica (nonalcoholic)
• Amnes (t)ic syndrome (post-traumatic)
• Psychosis, psychotic › Korsakoff's, Korsakov's, Korsakow's (nonalcoholic)
• Amentia › Meynert's (nonalcoholic)
• Syndrome › Korsakoff (-Wernicke) (nonalcoholic)
• Disease, diseased › Korsakoff's (nonalcoholic)
• Korsakoff's (Wernicke) disease, psychosis or syndrome (alcoholic) › nonalcoholic

Inclusion Terms

• Korsakov's psychosis or syndrome, nonalcoholic

U.S. Hospital Utilization

• An estimated 1,675 U.S. inpatient stays in 2023 included F04 among the documented diagnoses.
• 115 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)