F04 Amnestic disorder due to known physiological condition

Billable ICD-10-CM code, FY2026.

Applicable to

• Korsakov's psychosis or syndrome, nonalcoholic

Excludes1 (never code together)

• amnesia NOS (R41.3)
• anterograde amnesia (R41.1)
• dissociative amnesia (F44.0)
• retrograde amnesia (R41.2)

Excludes2 (not included here)

• alcohol-induced or unspecified Korsakov's syndrome (F10.26, F10.96)
• Korsakov's syndrome induced by other psychoactive substances (F13.26, F13.96, F19.16, F19.26, F19.96)

Code first

• the underlying physiological condition

Applies from F04 Amnestic disorder due to known physiological condition

Applicable to

• Korsakov's psychosis or syndrome, nonalcoholic

Excludes1 (never code together)

• amnesia NOS (R41.3)
• anterograde amnesia (R41.1)
• dissociative amnesia (F44.0)
• retrograde amnesia (R41.2)

Excludes2 (not included here)

• alcohol-induced or unspecified Korsakov's syndrome (F10.26, F10.96)
• Korsakov's syndrome induced by other psychoactive substances (F13.26, F13.96, F19.16, F19.26, F19.96)

Code first

• the underlying physiological condition

Risk adjustment (HCC)

• RxHCC V08: HCC 112 — Dementia, Except Alzheimer's Disease
• ESRD V24: HCC 52

MS-DRG index

Defines the logic of DRG(s) 884 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 294.0 Amnestic disorder in conditions classified elsewhere (approximate)

Code annotations containing back-references to F04

Back-references to F04

• Type 2 Excludes: F44.0 Dissociative amnesia ("amnestic disorder due to known physiological condition (F04)")
• Type 2 Excludes: F63.1 Pyromania ("mental disorders due to known physiological condition (F01-F09)")
• Type 2 Excludes: F63.2 Kleptomania ("stealing in mental disorders due to known physiological condition (F01-F09)")
• Type 1 Excludes: R41.3 Other amnesia ("amnestic disorder due to known physiologic condition (F04)")

Back-references to F04

• Type 2 Excludes: F44.0 Dissociative amnesia ("amnestic disorder due to known physiological condition (F04)")
• Type 2 Excludes: F63.1 Pyromania ("mental disorders due to known physiological condition (F01-F09)")
• Type 2 Excludes: F63.2 Kleptomania ("stealing in mental disorders due to known physiological condition (F01-F09)")
• Type 1 Excludes: R41.3 Other amnesia ("amnestic disorder due to known physiologic condition (F04)")

Diagnosis Index entries for F04

• Amentia › Meynert's (nonalcoholic)
• Amnes (t)ic syndrome (post-traumatic)
• Disease, diseased › Korsakoff's (nonalcoholic)
• Disorder (of) › amnesic, amnestic › due to (secondary to) general medical condition
• Korsakoff's (Wernicke) disease, psychosis or syndrome (alcoholic) › nonalcoholic
• Meynert's amentia (nonalcoholic)
• Psychosis, psychotic › Korsakoff's, Korsakov's, Korsakow's (nonalcoholic)
• Syndrome › Korsakoff (-Wernicke) (nonalcoholic)
• Syndrome › organic › amnesic (not alcohol- or drug-induced)
• Syndrome › Wernicke-Korsakoff (nonalcoholic)
• Toxemica cerebropathia psychica (nonalcoholic)
• Wernicke-Korsakoff's syndrome or psychosis (alcoholic) › nonalcoholic

Nearby codes

• F04 Amnestic disorder due to known physiological condition (this code)