ICD-10 Code D49.0 – Neoplasm of unspecified behavior of digestive system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D49.0 – Neoplasm of unspecified behavior of digestive system
What it is
D49.0 identifies a neoplasm in the digestive system whose behavior is not specified as benign, malignant, or uncertain. Use it when documentation confirms a digestive tract tumor but does not define its exact nature.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a mass, abnormal imaging, endoscopic lesion, or pathology report describing a digestive system neoplasm without clear behavior.
When to use this code
Use this code when the record states a neoplasm of the digestive system and the provider has not yet documented whether it is benign or malignant. It may also fit when the site is digestive, but behavior is not otherwise classified. Check documentation before assigning it.
Do not use for
Do not use D49.0 if the lesion is documented as benign, malignant, in situ, or of uncertain behavior with a more specific code. Also avoid it when the record identifies a non-neoplastic digestive disorder.
Coding tip
Code the most specific neoplasm behavior available; if behavior is missing, query the provider before defaulting to D49.0.