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  2. ICD-10-CM Codes List
  3. C00–D49
  4. C15-C26
  5. Malignant neoplasm of small intestine (C17)

Malignant neoplasm of small intestine (C17)

The ICD-10 code section C17 covers malignant neoplasms, or cancers, of the small intestine and its specific parts. These codes are used to classify various types of cancer affecting the small bowel, including the duodenum, jejunum, ileum, Meckel's diverticulum, and overlapping sites within the small intestine.

This section includes detailed subcodes like C17.0 for cancers of the duodenum; often known as adenocarcinoma or lymphoma of the duodenum; and C17.1 and C17.2 for malignant tumors of the jejunum and ileum, respectively. C17.3 identifies cancers of Meckel's diverticulum, while C17.8 refers to overlapping malignant neoplasms that affect multiple areas of the small intestine. The C17.9 code is used when the exact site within the small intestine is unspecified but still malignant, covering conditions like B cell lymphoma, squamous cell carcinoma, and other primary adenocarcinomas. This ICD-10 code section helps healthcare providers and medical coders specifically identify and document the exact location and type of small intestine cancer for effective treatment and record-keeping.

Instructional Notations

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 small intestine C7A.01

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Duodenal Neoplasms

Tumors or cancer of the DUODENUM.

Duodenum

The shortest and widest portion of the SMALL INTESTINE adjacent to the PYLORUS of the STOMACH. It is named for having the length equal to about the width of 12 fingers.

Jejunal Neoplasms

Tumors or cancer in the JEJUNUM region of the small intestine (INTESTINE, SMALL).

Jejunum

The middle portion of the SMALL INTESTINE, between DUODENUM and ILEUM. It represents about 2/5 of the remaining portion of the small intestine below duodenum.