C18

icd
Non-Billable

Malignant neoplasm of colon


Guidelines

Excludes1
C15-C26Kaposi's sarcoma of gastrointestinal sites (C46.4)C18malignant carcinoid tumors of the colon (C7A.02-)
Excludes 2
C15-C26gastrointestinal stromal tumors (C49.A-)
Notes
2
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Related Codes

C18icd
Malignant neoplasm of colon
Malignant neoplasm of cecum
Malignant neoplasm of appendix
Malignant neoplasm of ascending colon
Malignant neoplasm of hepatic flexure
Malignant neoplasm of transverse colon
Malignant neoplasm of splenic flexure
Malignant neoplasm of descending colon
Malignant neoplasm of sigmoid colon
Malignant neoplasm of overlapping sites of colon