Benign neoplasm of soft tissue of retroperitoneum and peritoneum (D20) ICD-10-CM
The D20 code range covers benign neoplasm of soft tissue of retroperitoneum and peritoneum with 3 ICD-10-CM diagnosis codes. 2 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the D20 Range 3 codes · 2 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the D20 range.
Mesocolon
The fold of peritoneum by which the COLON is attached to the posterior ABDOMINAL WALL.
Omentum
A double-layered fold of peritoneum that attaches the STOMACH to other organs in the ABDOMINAL CAVITY.
About the D20 Code Range
The ICD-10 codes D20, D20.0, and D20.1 classify benign tumors located in the soft tissues of the retroperitoneum and peritoneum. These codes are used specifically to identify noncancerous growths in these areas of the abdomen.
The ICD-10 code D20 refers broadly to benign neoplasms of soft tissue in the retroperitoneum and peritoneum. More specifically, D20.0 is assigned for benign tumors in the retroperitoneum, which include various tissues such as the periadrenal, perirenal, and retrocecal regions. Recognizing terms like "benign neoplasm of retroperitoneum" or "tumor of peritoneum and retroperitoneum" helps coders accurately use this code. Meanwhile, D20.1 applies to benign growths in the peritoneum, involving structures like the omentum, mesocolon, and rectouterine pouch. Synonyms such as "benign neoplasm of the peritoneum" or "neoplasm of the mesentery" guide in assigning this code correctly. These codes assist healthcare professionals and coders in precisely documenting benign soft tissue tumors in these abdominal regions for clinical and billing purposes.
Questions About This Page
How many billable codes are in the D20 range?
Of the 3 codes in this range, 2 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the D20 range classify?
The range classifies benign neoplasm of soft tissue of retroperitoneum and peritoneum. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
