Malignant neoplasm of rectum

This code represents a primary cancerous tumor originating in the rectum, which is the final section of the large intestine connecting the colon to the anus. This malignancy is characterized by uncontrolled cell growth with the potential to invade surrounding tissues and metastasize to distant sites.

Use this code for documented cases of adenocarcinoma, squamous cell carcinoma, or other primary malignant neoplasms confirmed to be located in the rectum. This diagnosis is typically supported by pathology reports from biopsy or surgical resection, imaging studies (e.g., colonoscopy, CT scan), and physician documentation.

• Do not use this code if the documentation specifies a malignant carcinoid tumor of the rectum; use C7A.026 instead.
• Ensure laterality (e.g., anterior, posterior) or specific subsite within the rectum is not specified, as this code is for a general rectal malignancy.
• Sequence this code as the primary diagnosis when the patient is receiving treatment for the rectal cancer, or as a secondary diagnosis when it is a co-morbidity affecting care.