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ICD-10-CM 2027

ICD-10 code for Hysteria

F44.9

Dissociative and conversion disorder, unspecified

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Hysteria, hysterical (conversion) (dissociative state)”. Page updated September 29, 2026.

About coding Hysteria

The ICD-10-CM code for Hysteria is F44.9 (Dissociative and conversion disorder, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F44.9.

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.

More specific Hysteria codes (official index)

  • anxiety F41.8 — Other specified anxiety disorders
  • convulsions F44.5 — Conversion disorder with seizures or convulsions
  • psychosis, acute F44.9 — Dissociative and conversion disorder, unspecified

Common questions about Hysteria ICD-10 codes

What is the ICD-10 code for Hysteria?

F44.9 — Dissociative and conversion disorder, unspecified. More specific codes apply when the documentation supports them: F41.8, F44.5, F44.9.

What is the ICD-10 code for anxiety hysteria?

F41.8 — Other specified anxiety disorders.

What is the ICD-10 code for convulsions hysteria?

F44.5 — Conversion disorder with seizures or convulsions.

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.