ICD-10 Code C71.4 – Malignant neoplasm of occipital lobe (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C71.4 – Malignant neoplasm of occipital lobe
What it is
C71.4 identifies a malignant tumor arising in the occipital lobe of the brain. Use it when the record specifies a cancer in this posterior cerebral region.
Clinical signs
Clinical features vary; refer to documentation. Occipital lobe tumors may present with visual field loss, visual disturbances, or seizure activity, but you should code only what the provider documents.
When to use this code
Use C71.4 when the diagnosis states primary malignant neoplasm of the occipital lobe, including confirmed brain cancer in that lobe. It also fits when imaging or pathology localizes the malignancy there and the provider documents it as the site of origin. Check documentation if the record only says “brain tumor” without a specific lobe.
Do not use for
Do not use this code for benign tumors, metastatic disease to the brain, or uncertain masses without confirmation of malignancy. If the lesion site is not clearly the occipital lobe, check documentation.
Coding tip
Verify that the occipital lobe is the documented primary site before assigning C71.4.