Medical Dermatology: acne, moles, and rashes. Surgical Dermatology: skin cancers, cysts, and other lumps and bumps. No referral is needed unless you have HMO insurance. Your skin problem can any location. Also, we see all ages and skin types. If a biopsy or test is needed, we try to do that on the day of the office visit. Most treatments can be performed in office.