ICD-10 Code D33 – Benign neoplasm of brain and other parts of central nervous system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D33 – Benign neoplasm of brain and other parts of central nervous system
What it is
D33 identifies a noncancerous tumor arising in the brain or other central nervous system structures. It indicates a benign neoplasm that may still cause problems because of location, size, or pressure on nearby tissue.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include headaches, seizures, focal neurologic deficits, or signs of increased intracranial pressure when the lesion affects the brain.
When to use this code
Use D33 when the provider documents a benign neoplasm of the brain or another central nervous system site. Apply the most specific subcategory available if the record identifies the exact location. If the pathology or imaging report is unclear, check documentation before coding.
Do not use for
Do not use D33 for malignant brain tumors, metastatic disease, or lesions documented as uncertain behavior. If the record describes a cyst, inflammatory mass, or another non-neoplastic process, this code is not appropriate.
Coding tip
Match the code to the documented CNS site and verify whether the neoplasm is primary, benign, or unspecified before assigning D33.