ICD-10 Code C16.6 – Malignant neoplasm of greater curvature of stomach, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C16.6 – Malignant neoplasm of greater curvature of stomach, unspecified
What it is
C16.6 identifies a malignant tumor arising in the greater curvature of the stomach when the exact site detail is not further specified. Use it for stomach cancer documented in that anatomic location.
Clinical signs
Clinical features vary; refer to documentation. Commonly, gastric malignancy is supported by endoscopic, imaging, or pathology findings showing a cancer in the greater curvature.
When to use this code
Use C16.6 when the provider documents primary stomach cancer on the greater curvature and does not name a more specific subsite. It also fits when pathology or operative notes confirm that location without additional detail. If the record only says stomach cancer, check documentation before assigning this code.
Do not use for
Do not use this code for malignancy in another stomach subsite, such as the cardia, fundus, body, pylorus, or lesser curvature. Do not use it for metastatic disease to the stomach or when the primary site is unclear.
Coding tip
Verify the exact gastric subsite in pathology, endoscopy, or operative documentation before coding.