C19

ICD-10Billable

Malignant neoplasm of rectosigmoid junction

Official ICD-10-CM descriptor (FY2026)

Malignant neoplasm of rectosigmoid junction

C19 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

  • Malignant neoplasm of colon with rectum
  • Malignant neoplasm of rectosigmoid (colon)

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • malignant carcinoid tumors of the colon (C7A.02-)

Where this code sits

Krasyn AI Coder

Get code suggestions automatically as you type notes. Free for 50 analyses.

Install for Chrome — free

Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

Get codes automatically as you write notes. Krasyn AI Coder for Chrome — free for 50 analyses.Install free →