Colon Cancer ICD-10-CM Codes

What ICD-10 Codes are Used for Colon Cancer 

While there are no specific colon cancer ICD codes, you can use the following six codes for coding and billing:

• C18.9 - Malignant neoplasm of colon, unspecified

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in their colon. The specific location of the neoplasm in the colon is unspecified, however. It’s best to use a more specific ICD-10 code if the location has been determined.

• C18.2 - Malignant neoplasm of ascending colon

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in their ascending colon.

• C18.4 - Malignant neoplasm of transverse colon

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in their transverse colon.

• C18.6 - Malignant neoplasm of descending colon

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in their descending colon.

• C18.7 - Malignant neoplasm of sigmoid colon

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in their sigmoid colon.

• C18.8 - Malignant neoplasm of overlapping sites of colon

This ICD-10 code is meant to be used on a person confirmed to have a malignant neoplasm in an overlapping site of the colon.

Are these colon cancer ICD codes billable?

Yes. All of the aforementioned colon cancer-related ICD-10 codes we listed above are valid and billable.

Clinical information

• Colon cancer, also known as colorectal cancer, primarily begins as clumps of precancerous cells (polyps) on the colon's inner lining.
• Common symptoms include changes in bowel habits, abdominal discomfort, fatigue, unexplained weight loss, and rectal bleeding.
• Risk factors for developing colon cancer encompass age (over 50), African-American race, a personal or family history of colon polyps or colon cancer, inflammatory intestinal conditions, a low-fiber, high-fat diet, diabetes, obesity, smoking, alcohol, and a sedentary lifestyle.
• To diagnose colon cancer, doctors may recommend tests like colonoscopy, blood tests, and imaging tests like CT scans.
• Treatment options vary based on the stage of cancer and may include surgery, radiation therapy, chemotherapy, immunotherapy, or targeted drug therapy.
• Early detection through routine screening can greatly reduce the risk of colon cancer.
• It's typically recommended that individuals start screening at age 50, and even earlier for those with a high risk.

Synonyms include:

• Carcinoma of colon
• Carcinoma of colon, stage I
• Carcinoma of colon, stage II
• Carcinoma of colon, stage III
• Carcinoma of colon, stage IV
• Malignant tumor of colon
• Malignant tumor of large intestine
• Lymphoma of colon