Absence and aplasia of testis

This code signifies the congenital absence of one or both testes (anorchia) or the incomplete development of testicular tissue (testicular aplasia). It describes a condition where the testes are either entirely missing or severely underdeveloped from birth, impacting male reproductive and endocrine function.

Use this code when documentation explicitly states congenital anorchia or testicular aplasia. This diagnosis is typically made during infancy or childhood following physical examination, imaging studies (e.g., ultrasound, MRI), and hormonal evaluations. Supporting documentation should include findings from these diagnostic procedures.

• Differentiate from cryptorchidism (undescended testis), which has distinct codes.
• Specify laterality (e.g., Q55.00 for unspecified, Q55.01 for unilateral, Q55.02 for bilateral) if documented.
• Consider additional codes for associated congenital anomalies or endocrine disorders, such as hypogonadism, if present.