


Andrew Boxer, MD
(973) 471-8200
Dr. Boxer sees patients as part of GANJ (Gastroenterology Associates of NJ) and United Medical. He has offices in Clifton, Verona, and Bayonne. He completed his gastroenterology training at NYU School of Medicine. Dr. Boxer is currently on faculty at Hackensack University School of Medicine at Seton Hall.
Fluent in English and Spanish.

Howard Baum, MD
(973) 777-7911
Dr Baum sees patients as part of Summit Medical Group. He completed
his gastroenterology training at Cornell University Medical College. He completed his GI training at The New York Hospital/Cornell Medical Center. His office is in Clifton.
Fluent in Spanish and Portugese.

Steven D. Gronowitz, MD, FACG
(973) 471-8200
Dr. Gronowitz sees patients as part of GANJ (Gastroenterology Associates of NJ) and United Medical. He completed his gastroenterology training at New York Medical College. He has offices in Clifton, Lyndhurst and Bayonne. Dr. Gronowitz is currently on faculty at Hackensack University School of Medicine at Seton Hall. To contact his office call 973-471-8200.


Natan Krohn, MD
(973) 471-8200
Dr. Krohn sees patients as part of GANJ (Gastroenterology Associates of NJ) and United Medical. He completed his gastroenterology training at Montefiore Medical Center Albert Einstein College of Medicine. He has offices in Clifton, Verona, Hackensack and Bayonne.
Fluent in English and Spanish.


Boris Reydel, MD
(973) 777-7911
Dr. Reydel sees patients as part of Summit Medical Group. Dr. Reydel completed his gastroenterology training at Johns Hopkins School of Medicine. His office is in Clifton. He has a special interest device development for diagnostic and therapeutic endoscopy. He holds numerous patents and has more in the application process.
Fluent in English and Russian.