Dr. Michael Gross and Dr. Jason Shatkin co-founded Physician Specialists of Northern Jersey in Paramus, NJ, ... Patient Portal Log in Now. Physician Specialists of Northern Jersey. 1 Sears Drive, Suite 306 Paramus, NJ 07652. Phone: 201-830-2287 Fax: 201-830-2286. Hours. Monday-Friday 9:00 AM-7:00 PM.