Malignant neoplasm of other sites of digestive system and intra-abdominal organs

This code represents a primary malignant tumor originating in digestive system organs or intra-abdominal sites not specifically classified elsewhere. This includes cancers of the peritoneum, mesentery, omentum, and other ill-defined intra-abdominal locations. It signifies a confirmed diagnosis of malignancy in these less common or unspecified digestive/intra-abdominal sites.

Use this code when documentation specifies a primary malignant neoplasm of the digestive system or intra-abdominal organs that does not have a more specific ICD-9-CM code. This is appropriate for cases where the exact primary site within the digestive system or intra-abdominal region is known to be malignant but falls outside more specific categories (e.g., stomach, colon, liver). Documentation must clearly state "malignant neoplasm" and indicate the site as "other" or "unspecified" within the digestive or intra-abdominal system.

• Always seek a more specific code if the primary site is known (e.g., stomach, small intestine, pancreas).
• This code is for primary malignancy; use secondary codes for metastatic disease.
• Ensure the documentation explicitly states "malignant neoplasm" and specifies an "other" or "unspecified" digestive/intra-abdominal site.