Blister (nonthermal) of flank, subsequent encounter

This code signifies a non-burn related blister located on the flank region of the body, documented as being treated during a subsequent visit. This indicates the initial treatment or assessment for the blister has already occurred, and the current encounter is for follow-up care, monitoring, or continued management.

Apply this code for follow-up appointments concerning a previously diagnosed and treated nonthermal blister on the patient's side. This includes scenarios such as wound checks, dressing changes, or evaluation of healing progress for a blister not caused by heat, chemicals, or radiation.

• Ensure documentation clearly specifies the encounter as "subsequent" for the blister.
• Verify the blister etiology is explicitly stated as nonthermal to differentiate from burn blisters.
• Confirm the anatomical location is precisely the "flank" to avoid miscoding to other trunk areas.