Corros 3rd deg mu sites of r shldr/up lmb, ex wrs/hnd, init

This code signifies a severe, full-thickness burn (third degree corrosion) affecting multiple areas of the patient's right shoulder and upper arm, excluding the wrist and hand. This type of injury involves destruction of the epidermis, dermis, and often underlying tissue, requiring significant medical intervention.

Apply this code for initial encounters where a patient presents with a chemical burn of the third degree to the specified anatomical regions. This is appropriate for the first time the patient is seen for this particular injury, whether in an emergency department, clinic, or hospital setting.

• Ensure the documentation clearly specifies "corrosion" (chemical burn) and "third degree" for all affected sites.
• Verify that the injury is to the right shoulder and upper limb, explicitly excluding the wrist and hand.
• Confirm this is the initial encounter for this specific injury; subsequent encounters will use different seventh characters.