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Home/Diagnosis/ICD-10 Coding for Colon Adenocarcinoma

ICD-10 Coding for Colon Adenocarcinoma

C18.2
C18.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for colon adenocarcinoma includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Colorectal Cancer
Colon Cancer
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Key Information: ICD-10 Coding for Colon Adenocarcinoma

Essential facts and insights about ICD-10 Coding for Colon Adenocarcinoma

Use ICD-10 code C18.2 for malignant neoplasm of ascending colon, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Malignant neoplasm of ascending colon

Billable Code
C18.2
Billable

Diagnostic Criteria

  • • Histologic confirmation of adenocarcinoma
  • • Imaging or biopsy specifying ascending colon

Applicable To

  • • Adenocarcinoma of hepatic flexure
  • • Adenocarcinoma of cecum

Important Notes

  • • Ensure the specific site within the colon is documented to avoid using unspecified codes.

Malignant neoplasm of colon, unspecified

Billable Code
C18.9
Billable

Diagnostic Criteria

  • • Diagnosis of colon cancer without specific site documentation

Applicable To

  • • Colon cancer NOS

Important Notes

  • • Query the provider for specific site documentation if possible.
Ancillary Codes

Additional codes that may be used with this diagnosis

C78.7

Secondary malignant neoplasm of liver

Use when liver metastasis is present.

Frequently Asked Questions

What is the ICD-10 code for colon adenocarcinoma?

The ICD-10 code for colon adenocarcinoma depends on the tumor's location, such as C18.2 for the ascending colon. Use C18.9 if the specific site is not documented.

How do you code metastatic colon cancer to the liver?

For metastatic colon cancer to the liver, use the primary colon cancer code (e.g., C18.2) and C78.7 for liver metastasis.

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