C21.8 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Malignant neoplasm of overlapping sites of rectum, anus and anal canal.
Inclusion term
Malignant neoplasm of anorectal junction
Malignant neoplasm of anorectum
Primary malignant neoplasm of two or more contiguous sites of rectum, anus and anal canal
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code