Exposure to supersonic waves, sequela

This code signifies the long-term or residual effects resulting from a past exposure to supersonic waves. These sequelae can manifest as various auditory or neurological impairments that persist after the initial acute phase of injury.

Apply this code when documenting conditions such as chronic hearing loss, tinnitus, or vestibular dysfunction that are directly attributed to a previous incident involving supersonic wave exposure. This code is appropriate for follow-up encounters addressing these persistent issues, not for the initial acute injury.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., H90.3- for sensorineural hearing loss).
• Ensure documentation clearly links the current condition to a past exposure to supersonic waves.
• The "S" in the seventh character indicates sequela, meaning the residual effect of a past injury.