ICD-10-CM Book 2025 Edition
Chapters ICD-10-CM Book Table of Content /
C15-C26 Malignant neoplasms of digestive organs /
C21 Malignant neoplasm of anus and anal canal
Billable ICD-10-CM Code C21.8
C21.8
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Malignant neoplasm of overlapping sites of rectum, anus and anal canal 
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Malignant neoplasm of anorectal junction
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Malignant neoplasm of anorectum
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Primary malignant neoplasm of two or more contiguous sites of rectum, anus and anal canal
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