Blister (nonthermal) of left wrist, sequela

This code signifies a non-heat-related fluid-filled lesion on the left wrist that is a residual effect or complication of a previous injury or condition. It indicates that the blister is not acute but rather a long-term consequence.

This code is appropriate when documenting a patient presenting with a blister on their left wrist that is clearly identified as a chronic or late effect of an earlier trauma, infection, or other non-thermal cause. It should be used when the original acute condition has resolved, and the blister is a persistent or recurring issue.

• Always ensure documentation explicitly states the blister is a "sequela" or "late effect" of a prior condition.
• Code the underlying cause of the original injury or condition first, if known and still relevant to the current encounter, followed by this sequela code.
• Verify the blister is specifically on the left wrist and not another part of the hand or arm.