C21.1 - Malignant neoplasm of anal canal
- Applicable to Malignant neoplasm of anal canal
- The 2025 edition of ICD10-CM C21.1 became effective on October 1, 2024.
- This is the American ICD10-CM version of C21.1 - other international versions of ICD10 C21.1 may differ.
- C21.1 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Inclusion Term
- Malignant neoplasm of anal sphincter
The following codes above C21.1 contain annotation back-references that may be applicable to C21.1:
Chapter: C00-D49 Neoplasms
Section: C15-C26 Malignant neoplasms of digestive organs
Category: C21 Malignant neoplasm of anus and anal canal
Billable/Specific Code
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Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
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