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How To Measure Lesion Excision Sites

Question: When the ED physician removes a benign lesion, how should I measure the excision size (the diameter of the wound)? Also, when should we measure the excision area -- before or after the lesion goes to pathology?

 

Montana Subscriber

 

Answer: When calculating lesion excision size for coding purposes, you’re selling yourself short if you just measure the lesion. For optimal return on your coding, report the total excised diameter on the claim.

 

How? First, find out the lesion’s exact size. Per CPT, code selection is determined by measuring the greatest clinical diameter of the apparent lesion plus that margin required for complete excision (i.e., excision diameter plus the narrowest margins required equals the excised diameter).

 

Suppose the ED physician treats a lesion on the patient’s left leg. The operative report indicates that the lesion was benign. The lesion was 2.6 cm at its widest point, and the ED physician also had to remove a margin of 0.3 cm on either side of the lesion.

 

To come up with total excised diameter, add the lesion diameter (2.6 cm) and the margin (0.3 cm + 0.3 cm), and the total diameter would be 3.2 cm.

 

On the claim, you would report 11404 (Excision, benign lesion including margins, except skin tag (unless listed elsewhere), trunk, arms, or legs; excised diameter 3.1 to 4.0 cm) for this encounter.

 

Also, link 216.7 (Benign neoplasm of skin of lower limb, including hip) to 11404 to represent the patient’s lesion.

 

Pre- or post-pathology? Lesions will shrink during the pathologist’s analysis, so have the physician measure and document the excision area, then send the lesion out to pathology.


Aug 14, 2007, 16:20

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