ICD-10 Code E29.1 – Testicular hypofunction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E29.1 – Testicular hypofunction
What it is
E29.1 identifies testicular hypofunction, meaning the testes are not producing enough hormones, especially testosterone. It is used when documentation supports impaired testicular function rather than a broader endocrine disorder.
Clinical signs
Clinical features may include low libido, infertility, decreased body hair, reduced muscle mass, or delayed pubertal development. Clinical features vary; refer to documentation.
When to use this code
Use E29.1 when the provider documents testicular failure, primary hypogonadism, or hypofunction of the testes. It may also fit follow-up encounters where the diagnosis is established and still relevant to care. Code only when the record clearly links the condition to testicular underfunction.
Do not use for
Do not use this code for unspecified endocrine symptoms, erectile dysfunction alone, or infertility without documented testicular hypofunction. Check documentation if the cause is pituitary, hypothalamic, or medication-related.
Coding tip
Confirm that the provider documents testicular hypofunction or primary gonadal failure before assigning E29.1.