Coding is one of the most complex and challenging tasks. Commonly utilized Dermatology billing codes include 40490 for Biopsy Lip and 15789 for a Chemical facial or Chemical peel. CPT Code 12021 is for superficial wound dehiscence and packing. This coding is what determines the correct remuneration. A Dermatology practice that makes errors in Dermatology Code and doesn’t quote the right symptoms could have their claim rejected. It is vital to cite the codes correctly. To avoid this, you must outsource Dermatology Medical Billing to experts.