All ICD10 Codes

C18

Non-Billable
ChapterC00–D49
Rankcategory
Official Description

Malignant neoplasm of colon

Use a more specific code (10 billable)
C18.0Malignant neoplasm of cecumC18.1Malignant neoplasm of appendixC18.2Malignant neoplasm of ascending colonC18.3Malignant neoplasm of hepatic flexureC18.4Malignant neoplasm of transverse colonC18.5Malignant neoplasm of splenic flexureC18.6Malignant neoplasm of descending colonC18.7Malignant neoplasm of sigmoid colonC18.8Malignant neoplasm of overlapping sites of colonC18.9Malignant neoplasm of colon, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

C15-C26 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • Kaposi's sarcoma of gastrointestinal sites (C46.4)
Excludes2(Not included here. Code separately if applicable.)
  • gastrointestinal stromal tumors (C49.A-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • malignant carcinoid tumors of the colon (C7A.02-)

Clinical Hierarchy

BillableHas subcodes
CH2Neoplasms (C00-D49)
C15-C26Malignant neoplasms of digestive organs (C15-C26)
C18Malignant neoplasm of colonNot billable
C18.0Malignant neoplasm of cecumBillable
C18.1Malignant neoplasm of appendixBillable
C18.2Malignant neoplasm of ascending colonBillable
C18.3Malignant neoplasm of hepatic flexureBillable
C18.4Malignant neoplasm of transverse colonBillable
C18.5Malignant neoplasm of splenic flexureBillable
C18.6Malignant neoplasm of descending colonBillable
C18.7Malignant neoplasm of sigmoid colonBillable
C18.8Malignant neoplasm of overlapping sites of colonBillable
C18.9Malignant neoplasm of colon, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to C18:

blockC15-C26
Malignant neoplasms of digestive organs (C15-C26)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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