Blister (nonthermal), right lower leg, sequela

This code identifies a nonthermal blister located on the patient's right lower leg. It signifies a current manifestation of a condition that is a late effect or complication of an earlier injury or disease.

Use this code when documenting a patient presenting with a blister on the right lower leg that is not due to heat or cold exposure, and it is a sequela of a prior condition. Examples include blisters forming years after a severe burn, or as a chronic skin reaction to a previous injury or dermatological condition.

• Always assign an underlying cause code for the sequela first, if known and applicable.
• Ensure the blister is explicitly documented as nonthermal and located on the right lower leg.
• Verify the documentation clearly supports the sequela nature of the blister.