Blister (nonthermal) of left shoulder, subsequent encounter

This code signifies a non-burn related blister located on the patient's left shoulder, encountered during a follow-up visit for treatment or healing. It indicates that the initial injury has already been addressed, and the patient is now receiving ongoing care for the blister.

Use this code for subsequent encounters when a patient presents for continued management of a non-thermal blister on their left shoulder. This includes visits for wound care, dressing changes, monitoring for infection, or evaluation of healing progress after the initial injury. It is appropriate after the acute phase of the injury has passed.

• Ensure documentation clearly specifies "left shoulder" and "non-thermal" etiology for the blister.
• Confirm this is a subsequent encounter; an initial encounter would use a different 7th character.
• Always code the underlying cause of the blister if known and applicable (e.g., friction, allergic reaction).