C17 – Malignant neoplasm of small intestine
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of digestive organs
ICD-10-CM code
C17
- Code
C17(claims format:C17)- Description
- Malignant neoplasm of small intestine
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C15-C26 Malignant neoplasms of digestive organs
Billable codes under C17
C17 is a header code and cannot be used on claims. Choose the most specific code:
- C17.0 – Malignant neoplasm of duodenumBillable
- C17.1 – Malignant neoplasm of jejunumBillable
- C17.2 – Malignant neoplasm of ileumBillable
- C17.3 – Meckel's diverticulum, malignantBillable
- C17.8 – Malignant neoplasm of overlapping sites of small intestineBillable
- C17.9 – Malignant neoplasm of small intestine, unspecifiedBillable
Notes for C17
Excludes1 (not coded here):
- malignant carcinoid tumors of the small intestine (C7A.01)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block C15-C26
Excludes1 (not coded here):
- Kaposi's sarcoma of gastrointestinal sites (C46.4)
Excludes2 (not included here):
- gastrointestinal stromal tumors (C49.A-)
Frequently asked questions
What is ICD-10 code C17?
C17 is the ICD-10-CM code for malignant neoplasm of small intestine, in the block C15-C26 (Malignant neoplasms of digestive organs).
Is C17 a billable code?
No. C17 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.