ICD-10 Code D20.1 – Benign neoplasm of soft tissue of peritoneum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D20.1 – Benign neoplasm of soft tissue of peritoneum
What it is
D20.1 identifies a noncancerous tumor arising from soft tissue within the peritoneum. Use it when the record documents a benign neoplasm in that anatomic site, not a malignant or metastatic process.
Clinical signs
Clinical features vary; refer to documentation. Patients may have an incidental abdominal mass, localized discomfort, or imaging findings suggesting a well-defined benign lesion.
When to use this code
Use D20.1 when the provider clearly documents a benign soft tissue neoplasm of the peritoneum. It may be assigned from pathology, operative, or imaging reports when the lesion is confirmed or treated as benign. If the site or behavior is unclear, check documentation before coding.
Do not use for
Do not use this code for malignant peritoneal tumors, metastatic disease, or nonspecific abdominal masses without a documented benign diagnosis. Check documentation if the lesion is described only as suspicious or indeterminate.
Coding tip
Verify both the benign behavior and the peritoneal soft tissue site before assigning D20.1.