C19
✓ Billable
Malignant neoplasm of rectosigmoid junction
ICD-10-CM · FY2026 · Neoplasms
Code
C19
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- Malignant neoplasm of colon with rectum
- Malignant neoplasm of rectosigmoid (colon)
Excludes1 — never code together
- malignant carcinoid tumors of the colon (C7A.02-)
Frequently asked questions
What is ICD-10 code C19?
ICD-10-CM code C19 represents Malignant neoplasm of rectosigmoid junction. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C19 billable?
Yes. C19 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is C19 in?
C19 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
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