ICD-10 Code D39.2 – Neoplasm of uncertain behavior of placenta (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D39.2 – Neoplasm of uncertain behavior of placenta
What it is
D39.2 identifies a placental neoplasm whose behavior cannot be determined as benign or malignant from the available information. Use it when the pathology or clinical record describes uncertain behavior of the placenta.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an abnormal placental mass, unusual placental enlargement, or pathology noting atypical growth without clear malignant behavior.
When to use this code
Use D39.2 when the provider documents a neoplasm of the placenta with uncertain behavior, or when pathology reports cannot classify it as benign or malignant. It may also fit after biopsy or surgical pathology if the final diagnosis remains uncertain. Check documentation for the exact site and behavior.
Do not use for
Do not use this code for clearly benign placental lesions or for malignant placental tumors with confirmed behavior. If the record does not specify uncertain behavior, check documentation before assigning D39.2.
Coding tip
Code the documented behavior exactly; if the report only says “placental mass,” you need a clearer diagnosis before using D39.2.