What ICD-10 codes are used for anal cancer?
Anal cancer is a rare form of cancer that begins in the anal canal. The ICD-10-CM coding system provides standardized codes for diagnosing and documenting anal cancer, which is important for accurate diagnosis, treatment planning, and medical billing. This guide aims to provide healthcare professionals with the ICD-10-CM codes commonly used for anal cancer.
Here are some commonly used ICD-10-CM codes for anal cancer:
C21.0: Malignant neoplasm of anus, unspecified
This code is used for cases where anal cancer is confirmed, but the specific subtype is not identified.
C21.1: Malignant neoplasm of anal canal
This code is used specifically for a malignant neoplasm of anal sphincter.
C21.2: Malignant neoplasm of cloacogenic zone
This code is designated for transitional cell carcinoma occurring in the anal area.
C21.8: Malignant neoplasm of overlapping sites of rectum, anus, and anal canal
This code is used when the cancer overlaps multiple areas, including the rectum, anus, and anal canal.
Do note that the codes under C21 excludes malignant melanoma of anal margin, anal skin, perianal skin, and any other and unspecified malignant neoplasm in/on the aforementioned sites.
Z85.048: Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus
This code is generally used to indicate a patient's history of anal cancer, which is important for ongoing surveillance and treatment.