Blister (nonthermal), right ankle, initial encounter

This code signifies a non-heat-related fluid-filled lesion on the right ankle. It indicates the initial presentation or active treatment phase of such a blister, rather than a follow-up or healing stage.

Apply this code when documenting a patient's first visit for a blister on their right ankle that was not caused by burns or frostbite. This would include blisters resulting from friction, allergic reactions, or other non-thermal etiologies.

• Ensure the blister is specifically on the right ankle and not another part of the foot or leg.
• Verify the cause is non-thermal; thermal blisters require different codes.
• The "A" suffix indicates an initial encounter for active treatment; use subsequent encounter codes for follow-up care.