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ICD-10-CM 2027 diagnosis code

F44.89Other dissociative and conversion disorders

✓ Billable / specific

F44.89 is a valid, billable ICD-10-CM code for other dissociative and conversion disorders. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Dream state, ICD-10 code for Ganser's syndrome, ICD-10 code for Confusional psychogenic state.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F44.89

F44.89 is the ICD-10-CM diagnosis code for other dissociative and conversion disorders. It belongs to category F44 (dissociative and conversion disorders), block F40-F48 (anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F44.8, choose F44.89 (Other dissociative and conversion disorders) only when documentation doesn't support a more specific option: dissociative identity disorder (F44.81).

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 887 (Other Mental Disorder Diagnoses, relative weight 1.1139), 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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 298.2 (reactive confusion) and 300.16 (factitious disorder with predominantly psychological signs and symptoms).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Ganser's syndrome
  • Psychogenic confusion
  • Psychogenic twilight state
  • Trance and possession disorders

Notes that apply from higher levels

Instructions written at a parent level also apply to F44.89.

› From F44 Dissociative and conversion disorders
Includes
  • conversion hysteria
  • conversion reaction
  • hysteria
  • hysterical psychosis
Excludes2
  • malingering [conscious simulation] (Z76.5)

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

29 entries

Terms in the official ICD-10-CM index that lead to F44.89.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 19 · Mental Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 298.2Reactive confusionapproximate
  • 300.16Factitious disorder with predominantly psychological signs and symptomsapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F44.89

Is F44.89 billable?

Yes. F44.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F44.89 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F44.89 as a principal diagnosis.

Is F44.89 a CC or MCC?

No. F44.89 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F44.89 group to?

F44.89 is used in the MS-DRG v44.0 logic for MS-DRG 887 (Other Mental Disorder Diagnoses). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for F44.89?

The CMS General Equivalence Mappings map F44.89 to ICD-9-CM 298.2 and 300.16.