2027 ICD-10-CM Diagnosis Code F64.0Transsexualism

ICD-10-CM Codes›F01–F99›F60-F69›F64

ICD-10-CM F64.0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F64.0 is a billable ICD-10-CM diagnosis code for transsexualism. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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.

  • Desire to become member of the opposite sex
  • Gender dysphoria
  • Gender dysphoria in adulthood
  • 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
  • Identifies as transgender man
  • Identifies as transgender woman
  • Transgender female
  • Transgender male

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F64.0: its own notes plus those printed at Chapter 5. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • gender identity disorder of childhood (F64.2)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F64.0, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming F64.0: they are not reported together with it, unless the two conditions are unrelated.

  • F64.2 Gender identity disorder of childhood
    gender identity disorder in adolescence and adulthood (F64.0)

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

  • 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)

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 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 1.1154. Higher weights mean higher Medicare reimbursement.

Can F64.0 be reported with F64.2?

Not as a rule. The Excludes1 note on F64.0 lists "gender identity disorder of childhood (F64.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

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.