ICD-10 Code F64 – Gender identity disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F64 – Gender identity disorders
What it is
F64 covers gender identity disorders, a group of diagnoses involving a marked incongruence between experienced gender and assigned sex. Use the specific subcode when documentation identifies the exact condition; otherwise, check documentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent gender incongruence, distress related to sex characteristics, and requests for gender-related evaluation or care.
When to use this code
Use F64 when the provider documents a gender identity disorder and no more specific ICD-10-CM code is available in the record. It may appear in behavioral health, primary care, or specialty notes when the diagnosis is established or being evaluated. Code only what is documented.
Do not use for
Do not use F64 for unrelated mental health concerns, sexual orientation, or routine gender-affirming care without a documented diagnosis. If the chart names another specific condition, code that instead.
Coding tip
Look for the exact provider wording and any more specific F64 subcategory before assigning the unspecified group code.