F44.0
BillableDissociative amnesia
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is F44.0 an HCC code?
Yes. F44.0 maps to Personality Disorders and Dissociative Disorders under the CMS-HCC V28 risk adjustment model (and Personality Disorders under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
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.
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 and Dissociative Disorders (HCC 153) with a community, non-dual, aged base RAF weight of 1.241. Under the older CMS-HCC V24 model, F44.0 maps to Personality Disorders (HCC 60) with a community, non-dual, aged base RAF weight of 0.000. 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.
Document the type of amnesia (localized, selective, generalized) if specified in clinical notes. Because F44.0 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, 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. This condition maps to HCC 153 under V28 with a significant RAF weight of 1.241, reflecting the complexity and resource utilization associated with dissociative disorders. 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
Excludes 2 — Not included here, may code separately
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