C72.21

HCC Category Mapping

What This Code Means

A malignant (cancerous) tumor of the right olfactory nerve, which is the nerve responsible for the sense of smell on the right side.

Coding Tips

• •This code specifies the right side; use C72.22 for left side and verify laterality in documentation
• •Olfactory nerve tumors are rare; confirm diagnosis and ensure proper documentation of nerve origin

Clinical Significance

Malignant neoplasm of the right olfactory nerve is a rare cranial nerve malignancy typically presenting as esthesioneuroblastoma. Right-sided laterality documentation is important for surgical planning and radiation field targeting. This code represents the highest specificity for this anatomical site and should be used whenever documentation confirms right-sided involvement.

Documentation Requirements

• ✓Pathology report with histological confirmation of malignancy
• ✓Clear documentation of right-sided olfactory nerve involvement
• ✓Imaging confirming laterality and extent of disease
• ✓Treatment status (active treatment, surveillance, or history of)
• ✓Staging information and any intracranial or orbital extension

Commonly Confused Codes