ICD-10 Code D37.8 – Neoplasm of uncertain behavior of other specified digestive organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D37.8 – Neoplasm of uncertain behavior of other specified digestive organs
What it is
D37.8 identifies a neoplasm in a digestive organ that is not clearly benign or malignant. Use it when the record names an uncertain behavior tumor in a specified digestive site outside the more specific D37 categories.
Clinical signs
Clinical features vary; refer to documentation. These lesions are often found on imaging, endoscopy, or pathology when the behavior cannot yet be confirmed as benign or malignant.
When to use this code
Use D37.8 when the provider documents an uncertain behavior tumor in an “other specified” digestive organ and no more specific ICD-10 code applies. It is appropriate for cases awaiting definitive pathology or when the chart explicitly states uncertain behavior. Check documentation for the exact organ site.
Do not use for
Do not use this code for benign, malignant, in situ, or metastatic neoplasms. If the organ site has a more specific D37 code, code that instead.
Coding tip
Verify both the anatomic site and the documented behavior before assigning D37.8.