Malignant neoplasm of rectosigmoid junction (C19) ICD-10-CM
The C19 code range covers malignant neoplasm of rectosigmoid junction with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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
Codes in the C19 Range 1 codes · 1 billable
- C19 Malignant neoplasm of rectosigmoid junction
About the C19 Code Range
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.
Questions About This Page
How many billable codes are in the C19 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the C19 range classify?
The range classifies malignant neoplasm of rectosigmoid junction. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
