What is ICD-10 code F44.0?

F44.0 is the ICD-10-CM diagnosis code for Dissociative amnesia. A condition where a person loses memory of important personal information or events, typically following a traumatic or stressful experience, without a physical cause. It belongs to the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99). F44.0 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. F44.0 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. F44.0 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. F44.0 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does F44.0 map to under V28?

F44.0 maps to CMS-HCC V28 HCC 153 (Personality Disorders; Anorexia/Bulimia Nervosa). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM F44.0: Dissociative amnesia

F44.0 maps to CMS-HCC V28 153. A source-labeled RAF reference is available. Documentation must support MEAT. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupF44.0Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48)

F44.0

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Dissociative amnesia

A condition where a person loses memory of important personal information or events, typically following a traumatic or stressful experience, without a physical cause.

Buddy Insight

Dissociative amnesia involves inability to recall important personal information, usually of a traumatic or stressful nature, that is too extensive to be explained by ordinary forgetfulness.

CMS-HCC V28

Mapped

HCC 153

Personality Disorders; Anorex...

Code-level coefficient reference

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

Mapped

HCC 133

Anxiety and Other Psychiatric...

Code-level coefficient reference

Code Book Path

Official

F44Dissociative and conversion disorders

F44.0Dissociative amnesia

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for F44.0 in this effective period.

Excludes 2

Official

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.-)

Related Child Codes

Official

F44.1Dissociative fugue

F44.2Dissociative stupor

F44.4Conversion disorder with motor symptom or deficit

F44.5Conversion disorder with seizures or convulsions

F44.6Conversion disorder with sensory symptom or deficit

Includes

Official

conversion hysteria
conversion reaction
hysteria
hysterical psychosis

Excludes 1

Official

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

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for F44.0 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for F44.0 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for F44.0 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Inability to recall important autobiographical information, usually traumatic or stressful in nature

Memory loss is inconsistent with ordinary forgetting and is too extensive for normal forgetfulness

Symptoms cause clinically significant distress or functional impairment

Disturbance is not attributable to substances (alcohol blackouts, drug effects) or a neurological condition (head injury, seizure disorder)

MEAT Support

HCC Buddy guidance

Inability to recall important autobiographical information, usually traumatic or stressful in nature

Memory loss is inconsistent with ordinary forgetting and is too extensive for normal forgetfulness

Symptoms cause clinically significant distress or functional impairment

Disturbance is not attributable to substances (alcohol blackouts, drug effects) or a neurological condition (head injury, seizure disorder)

Audit Caution

HCC Buddy guidance

Coding dissociative amnesia without ruling out organic/neurological causes of memory loss (TBI, seizures, dementia)

Confusing dissociative amnesia with alcohol-induced blackouts or substance-related memory impairment

Not distinguishing dissociative amnesia from the amnesia that occurs as part of dissociative identity disorder

Using F44.0 for ordinary forgetfulness or age-related memory decline

Common Mistakes

HCC Buddy guidance

R41.3 (Other amnesia) — Use R41.3 for amnesia without a dissociative basis (e.g., transient global amnesia); F44.0 is specifically dissociative

F44.1 (Dissociative fugue) — Fugue involves sudden travel with identity confusion plus amnesia; dissociative amnesia is memory loss without the fugue component

G31.84 (Mild cognitive impairment) — Mild cognitive impairment is neurodegenerative; dissociative amnesia is psychological

F44.81 (Dissociative identity disorder) — DID involves distinct personality states with amnesia; F44.0 is amnesia without alternate identities

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is F44.0 an HCC code?

Yes. F44.0 (Dissociative amnesia) maps to HCC 153, Personality Disorders; Anorexia/Bulimia Nervosa under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.396. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: F44.0 is billable and maps to V28 HCC 153, Personality Disorders; Anorexia/Bulimia Nervosa. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: F44.0
Description: Dissociative amnesia
HCC (V28): HCC 153 — Personality Disorders; Anorexia/Bulimia Nervosa
RAF reference coefficient: 0.396
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 153, Personality Disorders; Anorexia/Bulimia Nervosa

0.396

RxHCCHCC 133, Anxiety and Other Psychiatric Disorders

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work F44.0 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT Criteria for F44.0

For F44.0 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed F44.0 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

F44.0 is the ICD-10-CM diagnosis code for dissociative amnesia. A condition where a person loses memory of important personal information or events, typically following a traumatic or stressful experience, without a physical cause. F44.0 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (f40-f48).

Under the CMS-HCC V28 risk adjustment model, F44.0 maps to Personality Disorders; Anorexia/Bulimia Nervosa (HCC 153) with a source-labeled community, non-dual, aged reference coefficient of 0.396. No V24 mapping is shown for F44.0; use the applicable model and payment year when reviewing the V28 mapping. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Document the type of amnesia (localized, selective, generalized) if specified in clinical notes. Because F44.0 maps to an HCC category, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for F44.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Document the type of amnesia (localized, selective, generalized) if specified in clinical notes
•Ensure documentation distinguishes this from organic amnesia caused by medical conditions or substance use

Clinical Significance

Dissociative amnesia involves inability to recall important personal information, usually of a traumatic or stressful nature, that is too extensive to be explained by ordinary forgetfulness. Under V24 it maps to HCC 60 (Personality Disorders).

Documentation Requirements

✓Inability to recall important autobiographical information, usually traumatic or stressful in nature
✓Memory loss is inconsistent with ordinary forgetting and is too extensive for normal forgetfulness
✓Symptoms cause clinically significant distress or functional impairment
✓Disturbance is not attributable to substances (alcohol blackouts, drug effects) or a neurological condition (head injury, seizure disorder)
✓Not better explained by dissociative identity disorder, PTSD, somatic symptom disorder, or neurocognitive disorder
✓Neurological workup documented to rule out organic causes
✓Mental status examination findings including memory testing

Excludes 1, Do NOT code together

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

Excludes 2, Not included here, may code separately

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.-)

Commonly Confused Codes

•R41.3 (Other amnesia): Use R41.3 for amnesia without a dissociative basis (e.g., transient global amnesia); F44.0 is specifically dissociative
•F44.1 (Dissociative fugue): Fugue involves sudden travel with identity confusion plus amnesia; dissociative amnesia is memory loss without the fugue component
•G31.84 (Mild cognitive impairment): Mild cognitive impairment is neurodegenerative; dissociative amnesia is psychological
•F44.81 (Dissociative identity disorder): DID involves distinct personality states with amnesia; F44.0 is amnesia without alternate identities
•F10.26 (Alcohol dependence with alcohol-induced persisting amnestic disorder): Substance-induced amnesia is coded under the substance use category