Blister (nonthermal), right foot, sequela

This code signifies a non-heat-related blister located on the right foot, where the blister itself is a late effect or complication of an earlier injury or condition. This indicates that the blister is no longer an acute issue but rather a persistent or residual problem stemming from a previous insult.

Use this code when documenting a patient presenting with a chronic or residual blister on their right foot that is not due to a burn or frostbite. This is appropriate for conditions like a persistent blister scar, chronic skin changes at the site of a previous blister, or ongoing symptoms directly attributable to a past blister.

• Ensure the blister is explicitly documented as a "sequela" or "late effect" of a prior condition.
• Confirm the blister's etiology is non-thermal; if thermal, a burn code would be more appropriate.
• Always specify laterality (right foot) as indicated by the code.