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

This code signifies a non-thermal blister located on an unspecified area of the anterior chest wall, representing a long-term effect or complication of an initial injury or condition. It indicates that the acute phase of the original injury has passed, and the blister is a residual issue.

This code is appropriate for documenting a persistent or late-developing non-thermal blister on the front of the chest when the specific location (e.g., sternum, ribs) is not documented. It should be used when the blister is a sequela, meaning it's a consequence of a previous injury or condition, rather than an acute event.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the original injury that led to the sequela.
• Do not use this code for blisters due to burns or frostbite; specific codes exist for those etiologies.
• Ensure documentation clearly supports the "sequela" aspect, indicating the blister is a chronic or late effect.