My facility is in a argument about re-excisions of neoplasms

I bill the Pathology end of things only so the dermatology end of things does not pertain to me. I bill off the Pathology report

My question is on Diagnosis codes

Ex: Re-excision of Basal cell carcinoma or R arm, No residual tumor identified, reparative changes present, Incidental Sk

Do I bill the C44.612

Or do I bill L821, with Z code secondary to show that patient had a history of skin Ca at the site?

Thanks

Renae G