Can anyone tell how you get the total sq cm. For instance if the report says 4.0 cm X 3.5 cm. This is for debridgement, which leads me to part two of my question. Is the method the same for all ie debridgement, lesion removal etc.?
The math is easy ... to find sq cm you multiply length x width.
The harder part is determining if you really need square cm or you just need length or diameter. You mention lesions .... if you are excising a lesion you measure across the widest diameter, plus smalled margin necessary for removal (physician should measure BEFORE surgery, and document this measurement in the operative/procedure note). If you are doing a tissue rearrangement, you will need the sq cm measurement of the flap and primary defect, added together; CPT tells us not to code the lesion removal separately in cases where the wound is closed via a flap.
All this information can be found by reading the guidelines in your CPT manual carefullly. Study the illustrations as well, because they provide some clarification.