Learn more about our Patient Portal and its features here. Peter Heit, MD. Gastroenterology and Hepatology . Primary Location: Denville 16 Pocono Road, Ste 310 Denville, NJ 07834 P: 973.627.7570 F: 973.664.7572. Secondary Locations: Verona 271 Grove Ave, Ste A Verona (Grove Ave.), NJ 07044 P: 973.239.2600 F: 973.239.0482. North Haledon 535 High ....