Blister (nonthermal), left thigh, subsequent encounter

This diagnosis code signifies a non-thermal blister located on the left thigh. A non-thermal blister is typically caused by friction, pressure, or a chemical irritant, as opposed to heat or cold exposure. The "subsequent encounter" designation indicates that the patient is receiving follow-up care for a blister that was previously treated.

Use this code when documenting ongoing treatment, monitoring, or healing of a blister on the patient's left thigh that was not caused by burns or frostbite. This includes situations where the patient is returning for wound care, dressing changes, or evaluation of the blister's progression after initial assessment and treatment.

• Ensure the blister's etiology is explicitly documented as non-thermal to differentiate from burn or frostbite blisters.
• Verify laterality (left thigh) is clearly stated in the medical record.
• Confirm that this is not the initial encounter for this specific blister; if it is, a different encounter type code is required.