Blister (nonthermal), right foot, subsequent encounter

This code signifies a non-thermal blister located on the right foot, indicating a follow-up visit for a condition previously evaluated. It represents the ongoing management or assessment of an existing blister, rather than its initial presentation. The blister's etiology is not due to heat, cold, or chemical exposure.

Use this code for patients presenting for re-evaluation, dressing changes, or follow-up care of a non-thermal blister on the right foot after the initial encounter. This includes situations where the blister is healing, has ruptured, or requires further medical attention following the initial diagnosis.

• Ensure the documentation specifies "right foot" and a non-thermal cause.
• Verify the encounter is indeed "subsequent" and not the initial presentation.
• Pair with an external cause code (V00-Y99) if the cause of the blister is known and documented.