Blister of hand(s) except finger(s) alone, infected

This code signifies an infected fluid-filled lesion on the hand, excluding those solely on the fingers. It indicates a localized collection of serous fluid under the epidermis, accompanied by signs of infection such as erythema, warmth, pain, or purulent discharge.

Apply this code when documentation clearly states an infected blister located on the palm, back of the hand, or wrist area, but not isolated to a single finger. Supporting documentation should include a physical exam noting the blister's location and signs of infection, along with a physician's assessment.

• Differentiate from non-infected blisters; a separate code exists for those without infection.
• Ensure the documentation specifies "hand" and explicitly excludes "finger(s) alone" to avoid miscoding.
• Consider an additional E-code if the cause of the blister (e.g., burn, friction) is known and documented.