What F04 covers · when clinicians use it
ICD-10 code F04 identifies Amnestic disorder due to known physiological condition in the U.S. ICD-10-CM clinical and billing record set. It sits within the Mental, Behavioral & Neurodevelopmental chapter (F01–F99), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply F04 when an encounter's findings match the Amnestic disorder due to known physiological condition description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify F04 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for F04 and is a coding reference, not clinical, diagnostic, or billing advice.
F04 refers to Amnestic disorder due to known physiological condition, a class of cognitive and behavioral disorders triggered by identifiable physiological changes such as brain injury, stroke, infection, metabolic disturbance, or neurodegenerative disease. These conditions affect memory, attention, executive function, and behavior.
Symptoms
- Memory loss – A hallmark of dementia and amnestic syndromes
- Disorientation – Common in delirium (F05)
- Changes in personality or mood – Seen in F07 or frontal lobe damage
- Impaired judgment – Present across most disorders in this category
- Speech or communication issues – Particularly in advanced cognitive decline
- Visual hallucinations or delusions – May occur in F06 mental disorders
- Sleep-wake cycle disruption – Not uncommon in delirium or dementia
Diagnosis
Diagnosis of Amnestic disorder due to known physiological condition includes cognitive assessments (MMSE, MoCA), brain imaging (MRI or CT), lab tests for infections or metabolic issues, and review of underlying physiological causes. A thorough history and mental status examination are essential.
ICD10 Code Usage
ICD10 code F04 is used in neurology, psychiatry, geriatrics, and general medicine to track and manage mental disorders with a physical etiology. It supports care planning, behavioral health documentation, cognitive rehabilitation, and insurance claims.
Related Codes
- F01 – Vascular dementia
- F02 – Dementia in other diseases classified elsewhere
- F03 – Unspecified dementia
- F05 – Delirium due to known physiological condition
- F06 – Other mental disorders due to known physiological condition
- F07 – Personality and behavioral disorders due to known physiological condition
- F09 – Unspecified mental disorder due to known physiological condition
FAQs
Q1: What is ICD10 code F04?
A: It documents Amnestic disorder due to known physiological condition, a mental or cognitive disorder stemming from an underlying physical cause such as vascular, infectious, or metabolic issues.
Q2: Are these conditions reversible?
A: Some, like delirium (F05), may be reversible if treated promptly. Others, such as dementia (F01–F03), are usually progressive.
Q3: What’s the difference between dementia and delirium?
A: Dementia is chronic and progressive; delirium is typically acute and fluctuating in nature.
Q4: How are these managed?
A: Management includes treating the underlying cause, cognitive therapies, medication for symptoms, and caregiver support.
Q5: Who manages these disorders?
A: Neurologists, psychiatrists, geriatricians, and primary care physicians depending on the cause and severity.
Conclusion
ICD10 code F04 allows clinicians to identify and classify Amnestic disorder due to known physiological condition, guiding effective intervention, documentation, and care coordination across neurological and psychiatric services.