ICD-10-CM 2027 diagnosis code
F64.0Transsexualism
F64.0 is a valid, billable ICD-10-CM code for transsexualism. 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 Transgender, ICD-10 code for Transsexualism.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About F64.0
F64.0 is the ICD-10-CM diagnosis code for Transsexualism. 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 (gender identity disorders), F64.0 is specifically for Transsexualism. Related codes cover dual role transvestism (F64.1), gender identity disorder of childhood (F64.2), other gender identity disorders (F64.8), gender identity disorder, unspecified (F64.9) and gender identity disorder, in remission (F64.A).
Don't report F64.0 together with the conditions in its Excludes1 note: gender identity disorder of childhood (F64.2).
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 was added in FY2017, effective October 1, 2016.
Before ICD-10, this condition was coded in ICD-9-CM as 302.50 (Trans-sexualism with unspecified sexual history), 302.51 (Trans-sexualism with asexual history), 302.52 (Trans-sexualism with homosexual history) and 1 more.
Coding notes
- Gender dysphoria in adolescents and adults
- Gender identity disorder in adolescence and adulthood
- Gender incongruence in adolescents and adults
- Transgender
- gender identity disorder of childhood (F64.2)
Notes that apply from higher levels
Instructions written at a parent level also apply to F64.0.
Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
Alphabetic index entries
5 entriesTerms in the official ICD-10-CM index that lead to F64.0.
Codes whose notes reference F64.0
- F64.2Excludes1
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 →- 302.50Trans-sexualism with unspecified sexual historyapproximate
- 302.51Trans-sexualism with asexual historyapproximate
- 302.52Trans-sexualism with homosexual historyapproximate
- 302.53Trans-sexualism with heterosexual historyapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2017 (effective 10/1/2016): Added
- No changes since FY2017.
Common questions about F64.0
Is F64.0 billable?
- Yes. F64.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F64.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F64.0 as a principal diagnosis.
Is F64.0 a CC or MCC?
- No. F64.0 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does F64.0 group to?
- F64.0 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 F64.0?
- The CMS General Equivalence Mappings map F64.0 to ICD-9-CM 302.50, 302.51, 302.52 and 302.53.