Blister (nonthermal) of right front wall of thorax, sequela

This code signifies a non-heat-related blister located on the anterior aspect of the right chest wall, indicating a residual effect or complication from a previously healed injury or condition. It describes a chronic or late-stage manifestation of a blister that is no longer acute.

Use this code when documenting a patient presenting with a persistent or long-term blister on the right front of the chest, where the original cause was not thermal (e.g., friction, chemical exposure, allergic reaction), and the blister is now considered a sequela. This applies when the initial injury has resolved, but the blister remains as a lasting consequence.

• Ensure documentation clearly states the blister is non-thermal and located on the right anterior thorax.
• The "S" seventh character indicates a sequela, meaning the blister is a late effect of an earlier injury or condition.
• Do not use for acute blisters; this code is specifically for chronic or residual conditions.