1. Home
  2. ICD-10-CM Codes List
  3. C00–D49
  4. C15-C26
  5. Malignant neoplasm of rectosigmoid junction (C19)

Malignant neoplasm of rectosigmoid junction (C19)

ICD-10 code C19 is used to identify and classify malignant tumors located at the rectosigmoid junction, an area where the rectum and sigmoid colon meet. This code is essential for documenting cases of colorectal cancer specifically originating in this region.

The code C19 covers a variety of related conditions commonly referred to as primary carcinoma of the sigmoid colon, adenocarcinoma of the rectosigmoid junction, or more generally, malignant colorectal neoplasm. These synonyms help medical coders and healthcare providers ensure accurate coding when faced with terms like carcinoma of sigmoid colon or anorectal adenocarcinoma. Using this specific code supports precise reporting of malignancies involving the rectosigmoid area, which may exhibit characteristics such as microsatellite instability. The ICD-10 code for malignant neoplasm of the rectosigmoid junction facilitates proper classification for treatment planning, statistical tracking, and insurance claims related to this particular site of colorectal cancer.

Instructional Notations

Inclusion Terms

These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

  • Malignant neoplasm of colon with rectum
  • Malignant neoplasm of rectosigmoid (colon)

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • malignant carcinoid tumors of the colon C7A.02