Performing more than 2,500 Mohs micrographic dermatologic surgeries a year across multiple West Dermatology locations, Ronald Shiell, MD ranks among the highest-volume Mohs surgeons in the country and sees patients from Suite 415 at 4060 Fourth Avenue in Hillcrest. Staged tumor mapping with same-day frozen section pathology allows basal cell and squamous cell carcinoma clearance before reconstructive closure, with deeper facial defects sometimes handed off to Center for Oral & Facial Surgery for combined hard- and soft-tissue repair. The surgical workflow concentrates on high-risk skin cancer cases where margin control on the nose, eyelid, scalp, and lip drives the reconstructive plan. Patients pursuing later scar revision or laser resurfacing after Mohs closure often continue aesthetic follow-up with Evolve Aesthetic Surgery for dermabrasion and fractional laser touch-ups. The highest-acuity caseload involves chronically sun-damaged patients carrying multiple synchronous non-melanoma skin cancers that require staged excisions, flap reconstruction, and ongoing total-body surveillance over years of follow-up.