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Home/Diagnosis/ICD-10 Coding for Rectal Carcinoma

ICD-10 Coding for Rectal Carcinoma

C20
C19
C78.5

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

Also Known as:
Rectal Cancer
Rectal Adenocarcinoma
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Key Information: ICD-10 Coding for Rectal Carcinoma

Essential facts and insights about ICD-10 Coding for Rectal Carcinoma

Use ICD-10 code C20 for malignant neoplasm of rectum, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Malignant neoplasm of rectum

Billable Code
C20
Billable

Diagnostic Criteria

clinical:
  • • Biopsy confirms adenocarcinoma in the rectum
coding:
  • • Tumor located within the rectum, not extending to the sigmoid

Applicable To

  • • Adenocarcinoma of rectum

Important Notes

  • • Ensure documentation specifies tumor location and confirms malignancy.

Malignant neoplasm of rectosigmoid junction

Billable Code
C19
Billable

Diagnostic Criteria

clinical:
  • • Biopsy-proven adenocarcinoma
  • • Imaging showing tumor at rectosigmoid junction

Applicable To

  • • Adenocarcinoma of rectosigmoid junction

Important Notes

  • • Ensure precise documentation of tumor location.

Secondary malignant neoplasm of large intestine and rectum

Billable Code
C78.5
Billable

Diagnostic Criteria

clinical:
  • • Imaging or biopsy confirming metastasis to rectum

Applicable To

  • • Metastatic cancer to rectum

Important Notes

  • • Ensure primary site is documented and coded.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z85.038

Personal history of other malignant neoplasm of large intestine

Use for patients with a history of rectal carcinoma post-treatment.

Frequently Asked Questions

What is the ICD-10 code for rectal carcinoma?

The ICD-10 code for rectal carcinoma is C20, which is used for malignant neoplasm of the rectum.

How do you code metastatic rectal cancer?

For metastatic rectal cancer, use C78.5 to indicate secondary malignant neoplasm of the rectum, alongside the primary site code.

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