C18
Non-billableMalignant neoplasm of colon
Malignant neoplasm of colon
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Child Codes (10)
C18.0Malignant neoplasm of cecum
C18.1Malignant neoplasm of appendix
C18.2Malignant neoplasm of ascending colon
C18.3Malignant neoplasm of hepatic flexure
C18.4Malignant neoplasm of transverse colon
C18.5Malignant neoplasm of splenic flexure
C18.6Malignant neoplasm of descending colon
C18.7Malignant neoplasm of sigmoid colon
C18.8Malignant neoplasm of overlapping sites of colon
C18.9Malignant neoplasm of colon, unspecified
Also Known As / Clinical Terms
UMLS
- COLON CANCERC0007102
- Cancer of ColonC0007102
- Cancer of colonC0007102
- Cancer of the ColonC0007102
- Cancer, ColonC0007102
- Cancer, ColonicC0007102
- Cancers, ColonC0007102
- Cancers, ColonicC0007102
- Colon CancerC0007102
- Colon CancersC0007102
- Colon Neoplasm, MalignantC0007102
- Colon Tumor, MalignantC0007102
- Colon cancerC0007102
- Colon cancer NOSC0007102
- Colonic CancerC0007102
- Colonic CancersC0007102
- Colonic cancerC0007102
- Colonic cancer NOSC0007102
- Malignant Colon NeoplasmC0007102
- Malignant Colon TumorC0007102
- Malignant Colonic NeoplasmC0007102
- Malignant Colonic TumorC0007102
- Malignant Neoplasm of ColonC0007102
- Malignant Neoplasm of the ColonC0007102
- Malignant Tumor of ColonC0007102
- Malignant Tumor of the ColonC0007102
- Malignant neoplasm of colonC0007102
- Malignant neoplasm of colon (disorder)C0007102
- Malignant neoplasm of colon, unspecifiedC0007102
- Malignant tumor of colonC0007102
- Malignant tumour of colonC0007102
- ca colonC0007102
- cancer colonicC0007102
- cancer colonsC0007102
- cancer of colonC0007102
- cancer of the colonC0007102
- colon caC0007102
- colon cancerC0007102
- colon cancersC0007102
- colonic cancerC0007102
- malignant colon neoplasmC0007102
- malignant neoplasm of colonC0007102
- of cancer colonC0007102
- of the colon cancerC0007102
Frequently Asked Questions
What is ICD-10 code C18?
ICD-10-CM code C18 represents "Malignant neoplasm of colon". It is a non-billable header code — use a more specific child code for billing purposes.
Is C18 a billable code?
No, C18 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 10 child codes under C18.
What chapter is C18 in?
C18 is in Chapter 2: Neoplasms (codes C00-D49).
What codes cannot be used with C18?
C18 has Excludes1 notes indicating codes that cannot be used together with it, including: Kaposi's sarcoma of gastrointestinal sites (C46.4); malignant carcinoid tumors of the colon (C7A.02-).
What are the subcategories under C18?
C18 has 10 child codes, including: 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), and 6 more.
What are the UMLS CUIs for C18?
C18 is linked to 1 UMLS Concept Unique Identifier: C0007102. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.