C19 MALIGNANT NEOPLASM OF RECTOSIGMOID JUNCTION

Code Information

Diagnosis Code: C19
Short Description: Malignant neoplasm of rectosigmoid junction
Long Description: Malignant neoplasm of rectosigmoid junction
Code Version: 2025 ICD-10-CM

The code C19 is VALID for claim submission

Code Classification

Neoplasms (C00–D49)
- Malignant neoplasms of digestive organs (C15-C26)
  - Malignant neoplasm of rectosigmoid junction (C19)

Synonyms

Adenocarcinoma of rectosigmoid junction
Adenocarcinoma of rectum
Adenocarcinoma of rectum
Adenocarcinoma of sigmoid colon
Adenocarcinoma of sigmoid colon
Anorectal adenocarcinoma
Anorectal adenocarcinoma
Carcinoma of rectosigmoid junction
Carcinoma of sigmoid colon
Carcinoma of sigmoid colon
Malignant colorectal neoplasm
Malignant neoplasm of colorectum expressing human epidermal growth factor 2
Malignant neoplasm of rectosigmoid junction
Malignant neoplasm of rectosigmoid junction
Malignant neoplasm of rectum, rectosigmoid junction and anus
Microsatellite instability-high colorectal cancer
Microsatellite instability-high solid malignant tumor
Primary adenocarcinoma of colon
Primary adenocarcinoma of rectosigmoid junction
Primary carcinoma of colon
Primary carcinoma of rectosigmoid junction
Primary carcinoma of sigmoid colon
Primary malignant neoplasm of rectosigmoid junction
Primary malignant neoplasm of rectum
Primary malignant neoplasm of rectum
Primary malignant neoplasm of rectum
Primary malignant neoplasm of sigmoid colon
Primary malignant neoplasm of sigmoid colon
Primary malignant neoplasm of sigmoid colon

Diagnostic Related Group(s)

The code C19 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

Digestive Malignancy With Mcc (374)
Digestive Malignancy With Cc (375)
Digestive Malignancy Without Cc/mcc (376)

References to Index of Diseases and Injuries

The code C19 has the following ICD-10-CM references to the Index of Diseases and Injuries

Inclusion Terms:
- Malignant neoplasm of colon with rectum
- Malignant neoplasm of rectosigmoid (colon)
Type 1 Excludes Notes:
- malignant carcinoid tumors of the colon (@C7A.02*-)

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
C19		154.0	Mal neo rectosigmoid jct

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description

This page was last updated on: 10/1/2025

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