Blister (nonthermal) of left shoulder, sequela

This code signifies a non-burn related blister located on the left shoulder, representing a long-term effect or complication of an earlier injury or condition. It indicates that the blister is not a fresh injury but rather a residual issue from a previous event.

Use this code when documenting a patient presenting with a blister on their left shoulder that is clearly identified as a chronic or late effect of a prior trauma, dermatological condition, or other non-thermal cause. This is appropriate when the initial acute phase of the causative condition has passed, and the blister is a persistent consequence.

• Always ensure documentation clearly links the blister to a previous, resolved condition or injury.
• Do not use for acute, newly formed blisters; those require an acute injury code.
• Verify the laterality (left shoulder) is explicitly stated in the clinical notes.