Blister (nonthermal) of unspecified ear, subs encntr

This code signifies a non-burn related blister located on an unspecified part of the ear, encountered during a follow-up visit for the initial injury. It indicates that the patient is receiving ongoing care for this specific ear blister, which was previously treated.

Apply this code for patients presenting for subsequent care of a non-thermal blister on the ear, where the specific ear (left or right) is not documented. This is appropriate for follow-up appointments, wound checks, or dressing changes after the initial treatment of the blister. Documentation should clearly state "subsequent encounter" or similar language indicating ongoing care.

• Ensure documentation specifies "subsequent encounter" to justify the 7th character 'D'.
• Do not use if the blister is due to a burn; refer to T20-T32 for thermal injuries.
• If the specific ear is known (left or right), use the more specific codes S00.41XD or S00.42XD.