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ICD-10-CM Codes
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C00-D49
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C15-C26
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C18-
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2023 ICD-10-CM Diagnosis Code C18
2023 ICD-10-CM Diagnosis Code C18
Malignant neoplasm of colon
2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
- C18 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2023 edition of ICD-10-CM C18 became effective on October 1, 2022.
- This is the American ICD-10-CM version of C18 - other international versions of ICD-10 C18 may differ.
Type 1 ExcludesType 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as C18. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
The following code(s) above
C18 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
C18:
Clinical Information
- A primary or metastatic malignant neoplasm that affects the colon. Representative examples include carcinoma, lymphoma, and sarcoma.
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
Code annotations containing back-references to C18:
ICD-10-CM Codes Adjacent To C18
C16.6 Malignant neoplasm of greater curvature of stomach, unspecified
C16.8 Malignant neoplasm of overlapping sites of stomach
C16.9 Malignant neoplasm of stomach, unspecified
C17 Malignant neoplasm of small intestine
C17.0 Malignant neoplasm of duodenum
C17.1 Malignant neoplasm of jejunum
C17.2 Malignant neoplasm of ileum
C17.3 Meckel's diverticulum, malignant
C17.8 Malignant neoplasm of overlapping sites of small intestine
C17.9 Malignant neoplasm of small intestine, unspecified
C18
Malignant neoplasm of colon
C18.0 Malignant neoplasm of cecum
C18.1 Malignant neoplasm of appendix
C18.2 Malignant neoplasm of ascending colon
C18.3 Malignant neoplasm of hepatic flexure
C18.4 Malignant neoplasm of transverse colon
C18.5 Malignant neoplasm of splenic flexure
C18.6 Malignant neoplasm of descending colon
C18.7 Malignant neoplasm of sigmoid colon
C18.8 Malignant neoplasm of overlapping sites of colon
C18.9 Malignant neoplasm of colon, unspecified
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.