ICD-10 Code F64.0 – Transsexualism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F64.0 – Transsexualism
What it is
F64.0 identifies transsexualism, a diagnosis used when a person has a persistent desire to live and be accepted as a member of the opposite sex. Use the code only when documentation clearly supports this diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Typical records may note longstanding cross-gender identification, discomfort with assigned sex, and a wish for social, legal, or medical transition.
When to use this code
Use F64.0 when the clinician explicitly documents transsexualism or an equivalent diagnosis in the assessment. It may also fit encounters focused on evaluation, counseling, or coordination of gender-related care when the diagnosis is confirmed. Check documentation if the note uses broader gender identity terms.
Do not use for
Do not use this code for routine gender expression, sexual orientation, or uncertainty about gender identity. If the record only mentions distress without a documented diagnosis, check documentation before coding.
Coding tip
Code only from provider-documented terminology and avoid substituting F64.0 for unspecified gender-related concerns.