I use Encoder Pro and it states in instruction page for 21012 - "Excludes Complex repair ".
And according to our dermatology coder, commercial payors have not been denying.
And to add to that confusion, there is CPT assistant April, 2010 that states :
"New Musculoskeletal
System Guidelines
Whether reporting the excision or radical resection of soft tissue tumors from the subcutaneous, fascial or subfascial layer, appreciable vessel exploration and/or neuroplasty should be reported separately. Simple and intermediate repair closures are included in the excision procedures, but if complex repairs with extensive undermining or other techniques are performed to close a defect created by a lesion excision, the complex repair codes are reported -separately. The excision of musculoskeletal lesions (tumors), includes the dissection or elevation of tissue planes in order to allow resection of the tumor, and therefore, those services are not reported separately. The code selection for musculoskeletal lesion excisions is determined by measuring the greatest diameter of the tumor, in addition to the narrowest margin required for the complete excision of the tumor, based on the physician’s judgment, at the time of the excision. The radical resection of soft tissue tumors may be confined to a specific layer, for instance the subcutaneous or subfascial tissue, or it may involve the removal of tissue from one or more layers. Radical resection of soft tissue tumors is most commonly used for malignant or very aggressive benign tumors."
I don't agree to bill 21012 with any kind of closure if it bundles but there are 2 other coders here who thinks can be billed together with supporting (above) sources ..