The Derm Group is following guidance from the Centers for Disease Control (CDC), and state and city health officials as we reopen and care for our patients. Telemedicine appointments remain available for patients who prefer to be seen virtually. The Dermatology Group - Riverdale. 44 Route 23 North , Suite 213. Riverdale, NJ 07457.Our Team‧Photo Gallery‧Stephen Spates, M.D‧Paramus, NJ‧Morristown, NJ‧Nutley, NJ.