Gastrointestinal stromal tumor of stomach

📋Clinical Description

This code identifies a specific type of mesenchymal tumor originating in the stomach, characterized by its stromal cell origin rather than epithelial. These tumors arise from the interstitial cells of Cajal or their precursors, which are involved in regulating gut motility.

🎯When to Use

Assign this code when documentation confirms a diagnosis of gastrointestinal stromal tumor (GIST) explicitly located in the stomach. This diagnosis is typically established through biopsy and histopathological examination, often with immunohistochemical staining (e.g., positive for CD117/KIT).

💡Coding Tips

Differentiate from other gastric neoplasms, such as adenocarcinomas or lymphomas, which have distinct ICD-10-CM codes.
Ensure the pathology report specifically identifies the tumor as a GIST and confirms its gastric origin.
Do not use for GISTs located in other parts of the gastrointestinal tract; specific codes exist for those sites.

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Code Hierarchy

▲C49.AGastrointestinal stromal tumor

C49.A2(current)

Same Category

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