Blister of other, multiple, and unspecified sites, without mention of infection

This code signifies the presence of a fluid-filled lesion (blister) on various or multiple body sites, where there is no indication of bacterial or other infection. It describes a non-infected bulla or vesicle that can arise from friction, burns, or other non-infectious causes affecting more than one anatomical location or an unspecified area.

Use this code when documentation clearly states "blister" affecting multiple sites (e.g., both hands, feet, or widespread) or an unspecified body part, and explicitly notes the absence of infection. This is appropriate for conditions like widespread friction blisters, mild sunburn blisters without infection, or blisters from chemical exposure if infection is ruled out.

• Ensure documentation explicitly states "without infection" or provides no evidence of infection (e.g., no pus, fever, redness, or warmth).
• If a specific cause of the blister is known (e.g., burn, contact dermatitis), code the underlying condition first, if applicable, and then this code for the blister.
• Avoid using this code if the blister is localized to a single, specific site for which a more precise code exists (e.g., blister of foot, blister of hand).