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  2. ICD-10-CM
  3. Ch. C00-D49
  4. Sec. C15-C26
  5. Category C18
Category C18

Malignant neoplasm of colon

Clinical Classification Guidelines

Specific Diagnosis Codes

Malignant neoplasm of cecum
C18.0
Malignant neoplasm of appendix
C18.1
Malignant neoplasm of ascending colon
C18.2
Malignant neoplasm of hepatic flexure
C18.3
Malignant neoplasm of transverse colon
C18.4
Malignant neoplasm of splenic flexure
C18.5
Malignant neoplasm of descending colon
C18.6
Malignant neoplasm of sigmoid colon
C18.7
Malignant neoplasm of overlapping sites of colon
C18.8
Malignant neoplasm of colon, unspecified
C18.9
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Data updated for October 2025 release.

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