Epidemic vertigo

This code represents an acute, self-limiting vestibular disorder characterized by sudden onset of severe vertigo, nausea, vomiting, and nystagmus, often occurring in outbreaks. It is thought to be viral in origin, affecting the vestibular nerve or labyrinth, and is distinct from other forms of vertigo.

Use this code for patients presenting with symptoms consistent with an epidemic or outbreak of acute vestibular syndrome where a viral etiology is suspected. Documentation should clearly indicate an acute onset of vertigo, often accompanied by systemic symptoms, and potentially a history of exposure to similar cases.

• Differentiate from other forms of vertigo (e.g., benign paroxysmal positional vertigo, Meniere's disease) which have distinct ICD-10-CM codes.
• Ensure documentation supports the "epidemic" nature, even if it's a single case within a recognized outbreak.
• Do not use for general or unspecified vertigo; specific documentation of an epidemic presentation is required.