ICD-10-CM 2027
ICD-10 code for conversion neurosis
From the official ICD-10-CM alphabetic index entry “Neurosis, neurotic › conversion”. Page updated September 29, 2026.
About coding conversion neurosis
The ICD-10-CM code for conversion neurosis is F44.9 (Dissociative and conversion disorder, unspecified).
Within F44, choose F44.9 (Dissociative and conversion disorder, unspecified) only when documentation doesn't support a more specific option: dissociative amnesia (F44.0), dissociative fugue (F44.1), dissociative stupor (F44.2), conversion disorder with motor symptom or deficit (F44.4), conversion disorder with seizures or convulsions (F44.5), conversion disorder with sensory symptom or deficit (F44.6), conversion disorder with mixed symptom presentation (F44.7) and other dissociative and conversion disorders (F44.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about conversion neurosis ICD-10 codes
What is the ICD-10 code for conversion neurosis?
- F44.9 — Dissociative and conversion disorder, unspecified.
Is F44.9 billable?
- Yes. F44.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F44.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F44.9 as a principal diagnosis.
Is F44.9 a CC or MCC?
- No. F44.9 is neither a CC nor an MCC under MS-DRG v44.0.