Blister (nonthermal) of unspecified finger, subs encntr

This code describes a non-heat-related fluid-filled lesion on an unidentifiable finger, indicating that the patient is receiving follow-up care for this injury. The blister is not due to burns or frostbite, and the specific digit affected is not documented.

Apply this code when a patient presents for subsequent treatment of a blister on an unspecified finger, such as wound care, dressing changes, or monitoring for infection, and the initial injury was not caused by thermal exposure. This is appropriate for encounters after the initial treatment of the blister.

• Ensure documentation specifies "subsequent encounter" for the blister.
• Verify the blister is explicitly stated as non-thermal; otherwise, a burn code may be more appropriate.
• If the specific finger is identified in the documentation, a more precise code from the S60.42- series should be used.