Blister (nonthermal), unspecified ankle, subs encntr

This code signifies a non-thermal blister located on an unspecified ankle, indicating that the blister was not caused by heat, cold, or chemicals. The "subsequent encounter" designation means the patient is receiving follow-up care for this previously diagnosed blister.

Use this code for patients presenting for ongoing treatment, monitoring, or dressing changes for an ankle blister that was not caused by burns or frostbite. This applies when the specific ankle (right or left) is not documented or is unknown.

• Ensure documentation clearly states the blister is non-thermal and located on the ankle.
• Verify the encounter type is "subsequent" for ongoing care, not initial treatment.
• If the specific ankle is documented (right or left), use the more specific code.