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ICD-10-CM 2027 diagnosis code

F64.9Gender identity disorder, unspecified

✓ Billable / specific

F64.9 is a valid, billable ICD-10-CM code for gender identity disorder, unspecified. 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 Gender dysphoria, ICD-10 code for Gender incongruence disorder.

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 F64.9

F64.9 is the ICD-10-CM diagnosis code for gender identity disorder, unspecified. It belongs to category F64 (gender identity disorders), block F60-F69 (disorders of adult personality and behavior) 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 F64, choose F64.9 (Gender identity disorder, unspecified) only when documentation doesn't support a more specific option: Transsexualism (F64.0), dual role transvestism (F64.1), gender identity disorder of childhood (F64.2), other gender identity disorders (F64.8) and gender identity disorder, in remission (F64.A).

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 302.6 (gender identity disorder in children).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Gender dysphoria, unspecified
  • Gender incongruence, unspecified
  • Gender-role disorder NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to F64.9.

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

Alphabetic index entries

5 entries

Terms in the official ICD-10-CM index that lead to F64.9.

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 →
  • 302.6Gender identity disorder in childrenapproximate

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 F64.9

Is F64.9 billable?

Yes. F64.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F64.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F64.9 as a principal diagnosis.

Is F64.9 a CC or MCC?

No. F64.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F64.9 group to?

F64.9 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 F64.9?

The CMS General Equivalence Mappings map F64.9 to ICD-9-CM 302.6.