Blister (nonthermal) of other finger, sequela

This code signifies a non-heat-related blister on any finger other than the thumb, index, or middle finger, where the blister is a residual effect or complication of a previous injury or condition. It indicates that the blister is no longer an acute event but rather a lasting consequence.

Use this code when documenting a chronic or persistent blister on the ring or little finger that developed as a sequela of an earlier trauma, friction, or other non-thermal cause. This applies when the original injury has resolved, but the blister remains as a long-term issue.

• Requires an additional code to identify the original cause of the blister, if known and still relevant.
• Distinguish from acute blisters (S60.41-S60.49-) and thermal blisters (T23.-).
• Ensure documentation clearly supports the "sequela" aspect, indicating a past injury or condition.