Blister (nonthermal), left lower leg, subsequent encounter

This code indicates a non-burn related blister located on the left lower leg, specifically when the patient is receiving follow-up care for the initial injury. This could include treatment for complications, continued wound care, or monitoring of healing.

Apply this code for patients presenting for subsequent treatment of a blister on their left lower leg that was not caused by heat or cold. This is appropriate for office visits, hospital outpatient visits, or other encounters where ongoing management of the blister is provided after the initial diagnosis and treatment.

• Ensure the documentation clearly states "left lower leg" and that the blister is "nonthermal."
• Verify that this is not the initial encounter for the blister; if it is, a code without the "D" seventh character should be used.
• Always code any associated infections or complications separately.