Blister (nonthermal) of scalp, initial encounter

This code signifies a non-burn related fluid-filled lesion on the scalp. It indicates the initial presentation and treatment of such a blister, which may arise from various causes other than heat exposure.

Apply this code when documenting a patient's first encounter for a blister on the scalp that is explicitly stated as nonthermal in origin. This includes blisters due to friction, allergic reactions, or other irritants, provided the documentation confirms it's not a burn.

• Ensure documentation clearly specifies "nonthermal" to differentiate from burn blisters.
• Confirm this is the initial encounter for treatment; subsequent encounters would use a different seventh character.
• Consider additional codes for the underlying cause of the blister if known and documented (e.g., contact dermatitis).