C18.9 ICD-10-CM Code: Malignant neoplasm of colon, unspecified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
C18.9Malignant neoplasm of colon, unspecified
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where C18.9 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of digestive organs (C15-C26)
- 3
Category C18
Malignant neoplasm of colon
- 4
Code C18.9
Malignant neoplasm of colon, unspecified
Documentation details
Notes for this code
Inclusion terms
- Malignant neoplasm of large intestine NOS
Code first
No “code first” instruction is listed for C18.9.
Use additional code
No “use additional code” instruction is listed for C18.9.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for C18.9.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for C18.9.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code C18.9 mean?
C18.9 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm of colon, unspecified.”
Is C18.9 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, C18.9 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is C18.9 located in ICD-10-CM?
C18.9 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of digestive organs (C15-C26) (C15–C26), under category C18, Malignant neoplasm of colon.
What coding notes are listed for C18.9?
Its listed inclusion terms are Malignant neoplasm of large intestine NOS. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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