D43.3

Billable

Neoplasm of uncertain behavior 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 tumor of the cranial nerves (nerves in the head and face) that cannot yet be classified as definitely benign or malignant.

Coding Tips

•Specify which cranial nerve is affected if documentation provides this detail
•Distinguish from D33.3 (benign neoplasm) and C72.4 (malignant neoplasm) based on pathology findings

Clinical Significance

Neoplasms of uncertain behavior of cranial nerves include tumors such as vestibular schwannomas (acoustic neuromas) and trigeminal nerve tumors that have histological features preventing definitive classification. These tumors can cause significant morbidity through cranial nerve compression, hearing loss, facial weakness, or trigeminal neuralgia.

Documentation Requirements

✓Documentation should specify which cranial nerve is involved when known, supported by magnetic resonance imaging and surgical pathology.
✓The pathology should describe the features leading to uncertain behavior classification.
✓Document any cranial nerve deficits, hearing changes, or other neurological symptoms.

Commonly Confused Codes

D33.3 (benign neoplasm of cranial nerves) is used when pathology confirms benign behavior.C72.50 (malignant neoplasm of cranial nerve, unspecified) is used for confirmed malignancies.D42.0 (uncertain behavior of cerebral meninges) involves the meninges rather than the nerves themselves.

Code Hierarchy

└D43Neoplasm of uncertain behavior of brain and central nervous system └D43.3Neoplasm of uncertain behavior of cranial nerves

└D43.3Neoplasm of uncertain behavior of cranial nerves