Button battery entering via natural orifice, init

This code signifies the initial presentation of a patient who has ingested or otherwise introduced a button battery into a natural body opening. This includes instances where the battery is still in transit or has lodged within the aerodigestive tract, ear canal, or nasal cavity. The primary concern is the potential for severe tissue damage due to electrical discharge and chemical leakage.

Apply this code for the initial encounter when a patient presents with a history or suspicion of button battery ingestion, insertion into the ear, or nasal cavity. This is appropriate for the initial evaluation, diagnostic workup, and immediate management of such an event. Subsequent encounters for ongoing care related to the same incident would use a different encounter character.

• Always assign an external cause code (e.g., Y92.-) to indicate the place of occurrence.
• Do not use this code for foreign bodies other than button batteries.
• Ensure the "A" for initial encounter is correctly appended for the first visit related to this event.