Acquired absence of ovaries, unilateral

This code signifies the absence of one ovary due to a non-congenital cause. This condition is typically the result of a surgical procedure, such as a unilateral oophorectomy, or a disease process that led to the destruction or removal of one ovary. It implies that the patient was born with both ovaries, but one is now missing.

Use this code for patients who have undergone a unilateral oophorectomy for reasons such as ovarian cysts, endometriosis, or malignancy, and only one ovary was removed. It is also appropriate for cases where one ovary has atrophied or been destroyed due to infection, trauma, or other acquired conditions. This code should be assigned when the patient's medical record clearly indicates the absence of a single ovary due to an acquired cause.

• Ensure documentation specifies "unilateral" and an "acquired" cause for the absence.
• Distinguish from congenital absence, which would be coded differently.
• Always sequence this code as a secondary diagnosis when a primary condition led to the oophorectomy.