Blister (nonthermal) of unspecified thumb, subs encntr

This code signifies a non-burn related blister located on an unspecified thumb, indicating that the specific thumb (right or left) was not documented. The "D" seventh character specifies that this is a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase of the blister.

Use this code when a patient presents for follow-up care, such as a dressing change or wound check, for a blister on their thumb that was not caused by heat or cold. This applies when the medical record does not specify which thumb is affected.

• Ensure documentation clearly states the blister is nonthermal and located on the thumb.
• The "D" seventh character is appropriate for encounters after the initial treatment of the blister.
• If the specific thumb (right or left) is documented, a more specific code should be used.