Blister of face, neck, and scalp except eye, infected

This code signifies a localized collection of fluid under the epidermis, specifically on the face, neck, or scalp (excluding the eye area), that has become secondarily infected. The blister itself may be caused by various factors, such as burns, friction, or allergic reactions, with the key component for this code being the presence of infection.

Use this code when documentation clearly indicates an infected blister located on the patient's face, neck, or scalp, but not involving the eye. Supporting documentation would include physician notes detailing the presence of a blister, its anatomical location, and signs of infection such as erythema, purulence, warmth, or tenderness.

• Differentiate from non-infected blisters; if no infection is present, a different code from the 910 series without the ".3" suffix would be appropriate.
• Ensure the anatomical site is precisely documented as face, neck, or scalp. Blisters on other body parts would require different codes.
• Consider an additional code for the underlying cause of the blister (e.g., burn, contact dermatitis) if known and documented.