D33.3

Billable

Benign neoplasm of cranial nerves

HCC Category Mapping

V28HCC 23 — Melanoma and Other Skin Cancers

0.251

V24HCC 12 — Breast, Prostate, and Other Cancers and Tumors

0.150

ESRDHCC 12 — Breast, Prostate, and Other Cancers and Tumors

0.000

RxHCCHCC 22 — Cancer, Other Specified Sites

0.000

What This Code Means

A non-cancerous tumor that develops on one of the twelve pairs of nerves that originate from the brain.

Coding Tips

•Cranial nerves include the optic, oculomotor, trigeminal, facial, vestibulocochlear, and other nerves
•Document which specific cranial nerve is affected if possible for better clinical documentation

Clinical Significance

Benign neoplasm of the cranial nerves most commonly represents vestibular schwannoma (acoustic neuroma) arising from the vestibulocochlear nerve (CN VIII), which accounts for 80-90% of benign cranial nerve tumors. Other benign cranial nerve tumors include trigeminal schwannomas and facial nerve schwannomas. These tumors can cause hearing loss, tinnitus, facial weakness, and balance disturbances depending on the nerve involved.

Documentation Requirements

✓MRI with gadolinium enhancement documenting the cranial nerve tumor is the standard diagnostic study.
✓Identify the specific cranial nerve involved if possible.
✓Document tumor size, associated symptoms (hearing loss, tinnitus, facial paresis), audiometric findings, and the chosen management approach (observation, surgery, stereotactic radiosurgery).
✓If resected, include pathology confirming benign schwannoma.

Commonly Confused Codes

D33.0/D33.1 (benign brain neoplasm) is for parenchymal brain tumors D32.0 (cerebral meninges) is for meningiomas D36.10-D36.16 (benign neoplasm of peripheral nerves) is for nerves outside the cranium D43.3 (cranial nerve uncertain behavior) is for tumors with indeterminate biological behavior.

Code Hierarchy

└D33Benign neoplasm of brain and other parts of central nervous system └D33.3Benign neoplasm of cranial nerves

└D33.3Benign neoplasm of cranial nerves