F44.0 Dissociative amnesia

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

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

Excludes2 (not included here)

• alcohol-or other psychoactive substance-induced amnestic disorder (F10, F13, F19 with .26, .96)
• amnestic disorder due to known physiological condition (F04)
• postictal amnesia in epilepsy (G40.-)

Applies from F44 Dissociative and conversion disorders

Includes

• conversion hysteria
• conversion reaction
• hysteria
• hysterical psychosis

Excludes2 (not included here)

• malingering [conscious simulation] (Z76.5)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 153 — Personality Disorders; Anorexia/Bulimia Nervosa
• RxHCC V08: HCC 133 — Anxiety and Other Psychiatric Disorders
• ESRD V24: HCC 60

MS-DRG index

Defines the logic of DRG(s) 880 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 300.12 Dissociative amnesia

Code annotations containing back-references to F44.0

Back-references to F44.0

• Type 1 Excludes: F04 Amnestic disorder due to known physiological condition ("dissociative amnesia (F44.0)")

Back-references to F44

• Type 2 Excludes: F45 Somatoform disorders ("dissociative and conversion disorders (F44.-)")
• Type 2 Excludes: F93.0 Separation anxiety disorder of childhood ("nonpsychotic mental disorders (F40-F48)")
• Type 1 Excludes: R41 Other symptoms and signs involving cognitive functions and awareness ("dissociative [conversion] disorders (F44.-)")

Diagnosis Index entries for F44.0

• Amnesia › dissociative
• Amnesia › hysterical
• Amnesia › psychogenic

Nearby codes

• F44 Dissociative and conversion disorders
• F44.0 Dissociative amnesia (this code)
• F44.1 Dissociative fugue
• F44.2 Dissociative stupor
• F44.4 Conversion disorder with motor symptom or deficit
• F44.5 Conversion disorder with seizures or convulsions
• F44.6 Conversion disorder with sensory symptom or deficit