D48.3 Neoplasm of uncertain behavior of retroperitoneum

Billable ICD-10-CM code, FY2026.

Applies from D48 Neoplasm of uncertain behavior of other and unspecified sites

Excludes1 (never code together)

• neurofibromatosis (nonmalignant) (Q85.0-)

MS-DRG index

Defines the logic of DRG(s) 374-376 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 235.4 Neoplasm of uncertain behavior of retroperitoneum and peritoneum (approximate)

Code annotations containing back-references to D48.3

Back-references to D48.3

• Type 2 Excludes: M72 Fibroblastic disorders ("retroperitoneal fibromatosis (D48.3)")

Back-references to D48

• Type 1 Excludes: D49 Neoplasms of unspecified behavior ("neoplasms of uncertain behavior (D37-D44, D48)")

Diagnosis Index entries for D48.3

• Fibromatosis › retroperitoneal

Nearby codes

• D48.117 Desmoid tumor of back
• D48.118 Desmoid tumor of other site
• D48.119 Desmoid tumor of unspecified site
• D48.19 Other specified neoplasm of uncertain behavior of connective and other soft tissue
• D48.2 Neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system
• D48.3 Neoplasm of uncertain behavior of retroperitoneum (this code)
• D48.4 Neoplasm of uncertain behavior of peritoneum
• D48.5 Neoplasm of uncertain behavior of skin
• D48.6 Neoplasm of uncertain behavior of breast
• D48.60 Neoplasm of uncertain behavior of unspecified breast
• D48.61 Neoplasm of uncertain behavior of right breast