Medical Group
in Denville

Trusted. Local. Accessible.

Our Denville, NJ location offers two practices, gastroenterology and general surgery. Contact us to request an appointment or learn more.

Vanguard Medical Group in Denville, NJ

Vanguard Medical Group
16 Pocono Rd, Ste 310
Denville, NJ 07834

Peter Heit, MD
Phone: 973.627.7570
Fax: 973.664.7572

Marc Simon, MD
General Surgeon
Phone: 973.627.4227
Fax: 973.627.2066


The Vanguard Medical Group Denville, NJ location offers comprehensive gastroenterology and hepatology care, along with a general surgery practice under the same roof.

Gastroenterology and Hepatology

Our board-certified gastroenterologist diagnoses and treats problems with your digestive system and liver. The enteric nervous system that governs our digestion is second only to the brain in complexity. It requires a professional assessment to pinpoint the specific issues causing problems.

  • Colonoscopy
  • Irritable bowel syndrome
  • Inflammatory bowel disease
  • Abdominal pain
  • Gastroesophageal reflux disease (GERD)
  • Crohn’s and ulcerative colitis
  • Crohn’s and ulcerative colitis
  • Digestive health
  • Lactose intolerance
  • Stress-related gastroenterological issues
Denville Doctor's Office

Hours – Gastroenterology, Peter Heit, MD

  • Monday: 9:00 AM – 5:00 PM
  • Tuesday: 8:30 AM – 4:30 PM
  • Wednesday: 9:00 AM – 5:00 PM
  • Thursday: 8:30 AM – 4:30 PM
  • Friday: 9:00 AM – 5:00 PM

General Surgery

Our general surgeon evaluates the need, and urgency, for surgery. An expert in both robotic and laparoscopic techniques, he specializes in surgery of the abdomen. He strives to get you back to your daily routine as quickly as possible.

  • Abdominal surgery
  • Bariatric surgery
  • Breast disease surgery
  • Colon surgery
  • Hernia surgery
  • Intestinal surgery
  • Removal of lumps and bumps
  • Laparoscopic and robotic surgery

At Vanguard Medical Group, we value your health and fully evaluate your current health status, cultural preferences, family history, and medical needs. Our services are designed not only to diagnose and treat you during your illness, but to help you improve and maintain a healthy lifestyle.

Make an appointment today.

Vanguard Medical Group is in Suite 310 at 16 Pocono Road, Denville, NJ 07834, and serves residents of Denville, Rockaway, Randolph, Parsippany, and surrounding Morris County towns. Contact us by phone or by filling out the form on this page.

Hours – General Surgeon, Marc Simon, MD

  • Tuesday: 9:00 AM – 5:00 PM
  • Thursday: 9:00 AM – 5:00 PM

Additional Office Hours By Appointment