ICD-10 Code F44.9 – Dissociative and conversion disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F44.9 – Dissociative and conversion disorder, unspecified
What it is
F44.9 identifies a dissociative or conversion disorder when the record does not specify the exact subtype. Use it for symptoms involving disrupted consciousness, memory, identity, or neurologic-like function without a better-defined diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include amnesia, depersonalization, derealization, or motor and sensory symptoms that do not fit a recognized neurologic disease pattern.
When to use this code
Use F44.9 when the clinician documents dissociative disorder, conversion disorder, or a mixed presentation but does not name a more specific code. It also fits when the chart confirms the condition yet leaves the subtype unspecified. Check documentation if another mental, neurologic, or substance-related diagnosis is recorded.
Do not use for
Do not use this code for psychotic disorders, seizures with a confirmed neurologic cause, or symptoms better explained by substance use or another medical condition. If the note specifies a distinct dissociative subtype, code that instead.
Coding tip
Query for specificity whenever the provider documents dissociative or conversion symptoms, because a more precise code may be available.