Blister of trunk, without mention of infection

This code signifies a localized collection of fluid under the epidermis, specifically located on the patient's trunk (e.g., chest, back, abdomen), where there is no documented evidence of bacterial or other microbial infection. It represents a non-infected epidermal separation due to various etiologies.

Apply this code when documentation clearly indicates a blister on the torso without any signs or symptoms of infection, such as erythema, purulent discharge, warmth, or fever. This is appropriate for conditions like friction blisters, mild burns, or contact dermatitis presenting as a blister, provided infection is ruled out.

• Ensure the physician's documentation explicitly states the absence of infection. If infection is present, a more specific code is required.
• Distinguish from vesicles or bullae due to systemic conditions (e.g., autoimmune disorders), which would be coded differently.
• Always review for an underlying cause of the blister, as an additional code for the etiology (e.g., burn, contact dermatitis) may be necessary.