ICD 10 code for Colorectal Cancer
Malignant neoplasm of colon, unspecified
C18.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2024 edition of ICD-10-CM C18.9 became effective on October 1, 2023.
This is the American ICD-10-CM version of C18.9 – other international versions of ICD-10 C18.9 may differ.
Applicable to malignant neoplasm of large intestine NOS
The following code(s) above C18.9 contain annotation back-references that may be applicable to C18.9:
C00-D49 – Neoplasms
C15-C26 – Malignant neoplasms of digestive organs
C18 – Malignant neoplasm of colon
Approximate Synonyms
- Cancer of the colon
- Cancer of the colon, adenocarcinoma
- Cancer of the colon, hereditary nonpolyposis
- Cancer of the colon, stage 1
- Cancer of the colon, stage 2
- Cancer of the colon, stage 3
- Cancer of the colon, stage 4
- Carcinoma of colon, stage i
- Carcinoma of colon, stage ii
- Carcinoma of colon, stage iii
- Carcinoma of colon, stage iv
- Colon cancer metastatic to unspecified site
- Hereditary nonpolyposis colon cancer
- Malignant tumor of colon
- Metastasis from malignant tumor of colon
- Primary adenocarcinoma of colon
Clinical Information
- A primary or metastatic malignant neoplasm involving the colon.
- A primary or metastatic malignant neoplasm that affects the colon or rectum. Representative examples include carcinoma, lymphoma, and sarcoma.
- A primary or metastatic malignant neoplasm that affects the colon. Representative examples include carcinoma, lymphoma, and sarcoma.
ICD-10-CM C18.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):
- 374 Digestive malignancy with mcc
- 375 Digestive malignancy with cc
- 376 Digestive malignancy without cc/mcc
Convert C18.9 to ICD-9-CM
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
- 2024 (effective 10/1/2023): No change
Diagnosis Index entries containing back-references to C18.9:
Adenocarcinoma – see also Neoplasm, malignant, by site in adenomatous
polyposis coli C18.9
Carcinoma (malignant) – see also Neoplasm, by site, malignant in adenomatous
polyposis coli C18.9
Polyposis – see also Polyp
coli (adenomatous) D12.6
adenocarcinoma in C18.9
carcinoma in C18.9
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
If you would like to learn more about Colorectal Cancer ICD 10 Codes, please call us at 610-442-2346 or fill out our Contact Form.