Mark R. Zolnick, MD earned a degree of a Doctor of Medicine. Licenses and Affiliations. Mark R. Zolnick, MD has been registered with the National Provider Identifier database since February 28, 2006, and his NPI number is 1619943529. Book an Appointment. To schedule an appointment with Dr. Mark R. Zolnick, please call (505) 984-8012..