C18
Non-billableMalignant neoplasm of colon
C18 is the ICD-10-CM code for Malignant neoplasm of colon. It is a non-billable category code — use a more specific child code such as C18.0 for billing.
- Status
- Header (non-billable)
- Chapter
- C00-D49
- Subcodes
- 10
- Edition
- FY2026
C00-D49 Neoplasms
Excludes1 — not coded here
- •malignant carcinoid tumors of the colon (C7A.02-)
Frequently asked questions
- What is ICD-10 code C18?
- C18 is the ICD-10-CM code for "Malignant neoplasm of colon". It falls under C00-D49 Neoplasms.
- Is C18 a billable code?
- No — C18 is a non-billable header code. Use a more specific child code (such as C18.0) for billing.
- What is excluded from C18?
- Excludes1 (not coded here): malignant carcinoid tumors of the colon (C7A.02-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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