Blister (nonthermal), left thigh, sequela

This code signifies a non-thermal blister located on the left thigh. It indicates a current condition that is a residual effect or complication of an earlier injury or disease, rather than an acute event.

Apply this code when documenting a patient presenting with a blister on the left thigh that is clearly identified as a long-term consequence of a prior condition, such as a resolved burn, allergic reaction, or friction injury. This is appropriate when the original cause is no longer active but the blister persists as a sequela.

• Ensure documentation clearly links the blister to a previous, resolved condition.
• Do not use for acute blisters or blisters due to current thermal burns.
• Code the underlying cause of the sequela if known and still relevant for the encounter.