ICD-10-CM · Chapter 2

C26..9 Malignant neoplasm of ill-defined sites within the digestive system

Billable

← C26 — Malignant neoplasm of other and ill-defined digestive organs Chapter 2: C00-D49

Includes

Malignant neoplasm of alimentary canal or tract NOS
Malignant neoplasm of gastrointestinal tract NOS

Excludes 1 (cannot be coded together)

malignant neoplasm of abdominal NOS (C76.2)
malignant neoplasm of intra-abdominal NOS (C76.2)

Last reviewed: September 2026