ICD-10 Code D39.11 – Neoplasm of uncertain behavior of right ovary (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D39.11 – Neoplasm of uncertain behavior of right ovary
What it is
This code identifies a right ovarian mass or tumor whose behavior is uncertain, meaning the pathology cannot confirm whether it is benign or malignant. Use it when the diagnosis is specific to the right ovary.
Clinical signs
Clinical features vary; refer to documentation. Patients may have an adnexal mass, pelvic pain, bloating, or an incidental imaging finding, but these findings are not specific to this code.
When to use this code
Use D39.11 when the provider documents a neoplasm of uncertain behavior involving the right ovary. This may apply after imaging, surgery, or pathology when the lesion is not clearly benign or malignant. Code it only when laterality is documented as right.
Do not use for
Do not use this code for benign ovarian cysts, clearly malignant ovarian cancer, or neoplasms of the left ovary, unspecified ovary, or other adnexal sites. Check documentation if the behavior or laterality is unclear.
Coding tip
Confirm both the ovarian side and the “uncertain behavior” wording in the record before assigning D39.11.