Blister (nonthermal), right knee, subsequent encounter

This code describes a non-burn related blister located on the right knee. It indicates that the patient is receiving follow-up care for this specific blister after the initial treatment or diagnosis.

This code is appropriate for subsequent visits related to the management of a right knee blister that was not caused by heat or cold. This includes scenarios such as wound checks, dressing changes, or evaluation of healing progress for an existing blister.

• Ensure the blister is explicitly documented as nonthermal and located on the right knee.
• Verify that the encounter is for follow-up care, not the initial presentation.
• Consider an external cause code (V00-Y99) if the mechanism of injury for the blister is known and documented.