4-part fx surgical neck of l humerus, init for opn fx

This code signifies a severe fracture of the upper part of the left humerus (arm bone) that extends into four distinct pieces, specifically involving the surgical neck region. The "open" designation indicates that the bone has broken through the skin, creating an open wound and increasing the risk of infection.

Use this code for the initial treatment of a patient presenting with a newly diagnosed, complex fracture of the left humeral surgical neck that is visibly open to the environment. This applies to the first encounter for the injury, typically in an emergency department or acute care setting, where definitive treatment planning or initial surgical intervention occurs.

• Ensure documentation clearly specifies "left" humerus and "surgical neck" location.
• Verify the fracture is explicitly described as "open" and involves four parts.
• The "B" seventh character indicates an initial encounter for an open fracture, crucial for correct sequencing and reimbursement.