Blister (nonthermal) of left upper arm, sequela

This code signifies a non-thermal blister located on the patient's left upper arm, where the blister itself is a residual effect or complication of a previous injury or condition. It indicates that the original acute injury has healed, but the blister remains as a lasting consequence.

Use this code when documenting a patient presenting with a non-thermal blister on their left upper arm that is clearly identified as a long-term effect of an earlier, resolved injury. This is appropriate for follow-up encounters where the blister is no longer acute but a persistent issue.

• Always ensure the documentation explicitly states the blister is a "sequela" or "late effect" and is non-thermal.
• Verify the laterality is specifically the "left upper arm" to ensure accurate site specificity.
• Remember to also code the original cause of the sequela if known and still relevant for the encounter.