2026 ICD-10-CM Diagnosis Code F64.0Transsexualism

ICD-10-CM Codes›F01–F99›F60-F69›F64

ICD-10-CM F64.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F64.0 is a billable ICD-10-CM diagnosis code for transsexualism. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 887. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F64.0
Billable Status
Yes — Valid for Submission
Code Describes
Transsexualism
Short Description
Transsexualism
Same as the full description in the CMS dataset.
Parent Code
F64
Gender identity disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF60-F69Disorders of adult personality and behavior
CategoryF64Gender identity disorders
This CodeF64.0Transsexualism

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adult gender identity disorder, sexually attracted to both sexes
  • Adult gender identity disorder, sexually attracted to females
  • Adult gender identity disorder, sexually attracted to males
  • Adult gender identity disorder, sexually attracted to neither sex
  • Desire to become member of the opposite sex
  • Female to male transsexual person on hormone therapy
  • Female-to-male transsexual
  • Gender dysphoria
  • Gender dysphoria in adolescence and adulthood
  • Gender finding
  • Gender identity disorder of adolescence
  • Gender identity disorder of adolescence, previously heterosexual
  • Gender identity disorder of adolescence, previously homosexual
  • Gender identity disorder of adulthood
  • Gender identity disorder of adulthood, previously heterosexual
  • Gender identity disorder of adulthood, previously homosexual
  • Gender incongruence
  • Gender incongruence in adolescence
  • Gender incongruence in adulthood
  • Identifies as female gender
  • Identifies as female-to-male transsexual gender
  • Identifies as male gender
  • Identifies as male-to-female transsexual gender
  • Identifies as transgender man
  • Identifies as transgender woman
  • Male to female transsexual person on hormone therapy
  • Male-to-female transsexual
  • Mental disorder in adolescence
  • Surgically transgendered transsexual
  • Surgically transgendered transsexual, female-to-male
  • Surgically transgendered transsexual, male-to-female
  • Transgender female
  • Transgender male
  • Transsexual

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Gender dysphoria in adolescents and adults
  • Gender identity disorder in adolescence and adulthood
  • Gender incongruence in adolescents and adults
  • Transgender

Type 1 Excludes

  • gender identity disorder of childhood F64.2

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD013
Miscellaneous mental and behavioral disorders/conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Transsexualism

    expression of a gender identity inconsistent with, or not culturally-associated with the gender assigned to an individual at birth, combined with the desire to permanently transition to the gender with which they identify.

  • Gender Dysphoria

    a marked difference between the individual’s expressed/experienced gender and the gender others would assign to the individual, and it must continue for at least six months. (from dsm-5)

  • Gender Identity

    a person's concept of self as being male and masculine or female and feminine, or ambivalent, based in part on physical characteristics, parental responses, and psychological and social pressures. it is the internal experience of gender role.

  • Gender Dysphoria

    significant distress or impairment resulting from an inconsistency between an individual's biological sex and their self-identification. important notice: the nci thesaurus contains biomedical terminologies that nci does not own or control. this concept contains gender-related content that does not comply with executive order 14168.

  • Female-to-Male Transsexual Animal|Female-to-Male Transsexual

    an organism that was female at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more male physical characteristics.

  • Female-to-Male Transsexual Phenotype|Female-to-Male Transsexual

    an individual who was female at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more male physical characteristics.

  • Female-to-Male Transsexual|F-to-M|F2M|FTM|Female-to-Male Transsexual, Self-Report|TM|Trans Man|Transgender Male|Transgender male|Transman|Transsexual Male|Transsexual Man

    a person who was assigned to the female gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as male.

  • Male-to-Female Transsexual Animal|Male-to-Female Transsexual

    an organism that was male at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more female physical characteristics.

  • Male-to-Female Transsexual Phenotype|Male-to-Female Transsexual

    an individual who was male at birth based on physical characteristics and has undergone hormonal therapy and/or surgical procedures in order to develop more female physical characteristics.

  • Male-to-Female Transsexual|M-to-F|M2F|MTF|Male-to-Female Transsexual, Self-Report|TF|Trans Female|Trans Woman|Transgender Female|Transgender female|Transsexual Female|Transwoman

    a person who was assigned to the male gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as female.

  • Transsexual

    a person who was assigned to one gender at birth based on physical characteristics but who self-identifies psychologically and emotionally as the other.

Convert F64.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
302.50 Trans-sexualism NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
302.51 Trans-sexualism, asexual
Approximate The match is approximate rather than exact.
ICD-9-CM
302.52 Trans-sexual, homosexual
Approximate The match is approximate rather than exact.
ICD-9-CM
302.53 Trans-sex, heterosexual
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement F64.0 replaces the following previously assigned code(s):

  • F64.1 - Dual role transvestism
  • F64.1 - Gender identity disorder in adolescence and adulthood
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F64.0Overview

What is the ICD-10 code for transsexualism?

The ICD-10-CM code for transsexualism is F64.0 (sometimes written as F640). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is F64.0 (Gender identity disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report transsexualism on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F64.0 group to?

When transsexualism is the principal diagnosis on an inpatient stay, it groups to MS-DRG 887 (other Mental Disorder Diagnoses), which carries a relative weight of 1.0709. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F64.0?

Under the General Equivalence Mappings, transsexualism converts to ICD-9-CM 302.50 (trans-sexualism NOS), 302.51 (trans-sexualism, asexual), and 302.52 (trans-sexual, homosexual). The mapping is approximate, so confirm the match fits the documentation.