ICD-10 Code C72.30 – Malignant neoplasm of unspecified optic nerve (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C72.30 – Malignant neoplasm of unspecified optic nerve
What it is
This code identifies a malignant tumor involving the optic nerve, with the exact site not further specified. Use it when documentation confirms optic nerve cancer but does not name the side or a more precise location.
Clinical signs
Clinical features may include vision loss, decreased visual acuity, visual field defects, or optic disc changes. Findings vary; refer to documentation and imaging or pathology when available.
When to use this code
Use C72.30 when the record states malignant neoplasm of the optic nerve and does not specify right, left, or another defined site. It is also appropriate when laterality is unavailable in the documentation. If the provider documents a different primary site or a metastatic lesion, code that condition instead.
Do not use for
Do not use this code for benign optic nerve tumors, inflammatory optic neuropathy, or unspecified visual loss. Check documentation if the note only says optic nerve lesion or mass without confirming malignancy.
Coding tip
Verify laterality and whether the optic nerve is the primary site before assigning C72.30.