Congenital absence and aplasia of penis

This code represents the complete congenital absence of the penis (agenesis) or its incomplete development (aplasia). It is a rare birth defect where the external male genitalia are either entirely missing or severely underdeveloped from birth. This condition is distinct from micropenis, which involves a small but otherwise normally formed penis.

Use this code when documentation clearly states congenital agenesis or aplasia of the penis. This diagnosis is typically made at birth or shortly thereafter during a physical examination. Supporting documentation would include physician notes detailing the physical findings of absent or severely underdeveloped penile structures.

• Do not confuse with micropenis (Q55.61) or other congenital malformations of the penis (Q55.69), which describe a present but abnormally formed or sized penis.
• Ensure the documentation specifies "congenital absence" or "aplasia" to differentiate from acquired conditions or trauma.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, especially for initial evaluation or surgical correction.