Primary blast injury of left ear, initial encounter

This code signifies damage to the left ear resulting directly from the overpressure wave of an explosion. This type of injury can manifest as tympanic membrane rupture, ossicular chain disruption, or inner ear damage, and is distinct from secondary or tertiary blast injuries. It specifically refers to the initial presentation and treatment of such an injury.

Apply this code when documentation clearly states a patient presents with an ear injury, specifically the left ear, directly caused by a blast event. This includes scenarios like military personnel exposed to IEDs, individuals near industrial explosions, or victims of terrorist attacks. Supporting documentation should detail the blast mechanism and the specific ear affected.

• Ensure the documentation explicitly states "primary blast injury" and specifies the "left ear." Do not use for secondary (e.g., projectile) or tertiary (e.g., impact with ground) blast injuries.
• This "A" suffix indicates an initial encounter; subsequent care for the same injury will require a different seventh character (e.g., D for subsequent, S for sequela).
• Always code any associated specific ear injuries (e.g., tympanic membrane perforation, hearing loss) in addition to this primary blast injury code.