Blister (nonthermal) of unspecified finger, sequela

This code indicates a non-heat-related blister affecting an unspecified finger, representing a residual effect or complication of an earlier injury or condition. The blister itself is no longer acute but is a lasting consequence.

Apply this code when documentation clearly states a non-thermal blister on an unspecified finger as a sequela. This would be appropriate for chronic or persistent blistering, or complications arising from a previously resolved blister, where the initial injury is no longer present.

• Ensure the medical record explicitly states "sequela" or describes a chronic/residual condition related to a non-thermal blister.
• Avoid using this code for acute or current blisters; those require codes without the "S" seventh character.
• Always attempt to specify the finger (e.g., thumb, index finger) if documented, as more specific codes exist.