ICD-10 Code F04 – Amnestic disorder due to known physiological condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F04 – Amnestic disorder due to known physiological condition
What it is
F04 identifies an amnestic disorder caused by a known medical or neurological condition. It refers to significant memory impairment that is more than ordinary forgetfulness and is linked to an underlying physiological cause.
Clinical signs
Typical findings include impaired recent memory, difficulty learning new information, and possible disorientation. Clinical features vary; refer to documentation for the specific underlying condition and extent of cognitive impairment.
When to use this code
Use F04 when the record clearly states amnestic disorder due to a known physiological condition, such as a documented brain, systemic, or other medical cause. You should code the condition when the provider links the memory disorder to that cause. If the cause is not documented, check documentation before assigning this code.
Do not use for
Do not use F04 for simple age-related memory complaints, transient confusion, or unspecified cognitive decline. It is also not the right code when the documentation does not support a physiological cause.
Coding tip
Confirm that the provider explicitly connects the amnestic disorder to a known physiological condition before coding F04.