Malignant neoplasm of small intestine (C17) ICD-10-CM
The C17 code range covers malignant neoplasm of small intestine with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
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
Codes in the C17 Range 7 codes · 6 billable
- C17 Malignant neoplasm of small intestineNon-billable
- C17.0 Malignant neoplasm of duodenum
- C17.1 Malignant neoplasm of jejunum
- C17.2 Malignant neoplasm of ileum
- C17.3 Meckel's diverticulum, malignant
- C17.8 Malignant neoplasm of overlapping sites of small intestine
- C17.9 Malignant neoplasm of small intestine, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C17 range.
Malignant Duodenal Neoplasm
A primary or metastatic malignant neoplasm that affects the duodenum. Representative examples include carcinoma, lymphoma, and sarcoma.
Malignant Ileal Neoplasm
A primary or metastatic malignant neoplasm that affects the ileum.
Malignant Jejunal Neoplasm
A primary or metastatic malignant neoplasm that affects the jejunum.
Malignant Small Intestinal Neoplasm
A primary or metastatic malignant neoplasm that affects the small intestine.
Meckel Diverticulum
A congenital abnormality characterized by the outpouching or sac formation in the ILEUM. It is a remnant of the embryonic YOLK SAC in which the VITELLINE DUCT failed to close.
About the C17 Code Range
A malignant tumor affecting the small intestine may start there or spread there from elsewhere.
C17 is organized by site: the duodenum (C17.0), jejunum (C17.1), ileum (C17.2), or Meckel's diverticulum (C17.3). Separate codes describe overlapping sites of the small intestine (C17.8) and an unspecified site (C17.9).
Questions About This Page
How many billable codes are in the C17 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C17 range classify?
The range classifies malignant neoplasm of small intestine. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
