ICD-10 Code D37.05 – Neoplasm of uncertain behavior of pharynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D37.05 – Neoplasm of uncertain behavior of pharynx
What it is
This code identifies a pharyngeal growth whose behavior is not clearly benign or malignant. Use it when the record shows an uncertain neoplasm involving the pharynx, and the pathologic or clinical behavior is not yet established.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a visible or palpable pharyngeal mass, throat discomfort, swallowing difficulty, or persistent hoarseness, but these findings are not specific.
When to use this code
Use D37.05 when the provider documents an uncertain neoplasm, borderline lesion, or mass of the pharynx and has not confirmed malignant or benign behavior. It also fits when the lesion is under evaluation and the final pathology is not yet available. Code the documented site as precisely as possible.
Do not use for
Do not use this code for confirmed malignant neoplasms of the pharynx or for clearly benign lesions. If the documentation names a different anatomic site, such as tonsil or nasopharynx, verify the correct code.
Coding tip
Check the pathology, operative note, or assessment for the exact site and behavior before assigning D37.05.