The ICD-9 code range MALIGNANT NEOPLASM OF DIGESTIVE ORGANS AND PERITONEUM for 150-159 is medical classification list by the World Health Organization (WHO).
Malignant neoplasm of esophagus
Malignant neoplasm of stomach
Malignant neoplasm of small intestine including duodenum
Malignant neoplasm of colon
Malignant neoplasm of rectum rectosigmoid junction and anus
Malignant neoplasm of liver and intrahepatic bile ducts
Malignant neoplasm of gallbladder and extrahepatic bile ducts
Malignant neoplasm of pancreas
Malignant neoplasm of retroperitoneum and peritoneum
Malignant neoplasm of other and ill-defined sites within the digestive organs and peritoneum