Blister (nonthermal), left foot, sequela

This code signifies a non-heat-related blister located on the left foot, indicating a complication or late effect of an earlier injury or condition. It describes a persistent or residual blister that has developed as a consequence of a previous trauma or disease process, rather than an acute event.

This code is appropriate when documenting a patient presenting with a blister on their left foot that is a long-term consequence of a prior injury, friction, or other non-thermal cause. It should be used when the blister is not an acute occurrence but rather a sequela of a past event.

• Always ensure documentation clearly links the blister to a previous injury or condition as a sequela.
• Do not use this code for acute blisters; instead, refer to the appropriate acute injury codes.
• Verify the laterality (left foot) is explicitly stated in the medical record.