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Joao Lopes
out of 5
  • General Surgery
  • Bariatric (Weight Loss) Surgery
Accepting new patients

Appointments: Call 973-436-1860


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1 Seymour Street Bariatric (Weight Loss) Surgery

1 Seymour Street
6th Floor
Montclair, NJ 07042
United States

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Berkeley Heights Bariatric (Weight Loss) Surgery

1 Diamond Hill Road
Bensley Pavilion, 4th floor
Berkeley Heights, NJ 07922
United States

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95 Madison Avenue Weight Management/Endocrinology, 4th Flr

95 Madison Avenue
4th Floor, Suite 411
Morristown, NJ 07960
United States

Clinical Expertise

  • Abdominal wall hernia repairs
  • Abscess excision
  • Adjustable gastric band
  • Appendectomy
  • Appendix surgery
  • Bariatric (Weight Loss) Surgery
  • Bariatric surgery
  • Biliopancreatic diversion
  • Colon cancer surgery
  • Colon resection
  • Cyst excision
  • Diabetes
  • Diet
  • Diet and Nutrition
  • Duodenal switch
  • Endoscopic treatment of gastric diseases
  • Esophageal cancer
  • Esophageal motility problems
  • Esophageal tumors
  • Excess BMI
  • Excess weight
  • Fat
  • Gallbladder cancer / carcinoma
  • Gallbladder disease
  • Gallbladder surgery
  • Gastric banding
  • Gastric bypass surgery
  • Gastro esophageal reflux surgery
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Endoscopic Surgeon
  • High blood sugar
  • Hypertension
  • Laparoendoscopic Surgeon
  • Laparoscopic appendectomy
  • Laparoscopic cholecystectomy
  • Laparoscopic gallbladder surgery
  • Laparoscopic sigmoid colectomy
  • Laparoscopic techniques
  • Laparotomy
  • Lipid abnormality
  • Lipoma excision
  • Malabsorption
  • Minimally Invasive Surgery
  • Morbid obesity
  • Nutrition
  • Obesity
  • Overweight
  • Reflux disease
  • Restriction
  • Sleep Apnea Surgery
  • Sleeve gastrectomy
  • Spleen surgery
  • Splenectomy
  • Stomach stapling
  • Type 2 Diabetes
  • Vertical banded gastroplasty
  • Weight loss

Accepted Insurances

Always check with your health insurance carrier before scheduling any type of service. You can learn the details of your individual health insurance plan, including the amount of your copay, deductible, and coinsurance by visiting your health insurance company's website or by calling their customer service department. Click here to review our list of accepted insurance plans.

Training and Education

Board Certification

  • American Board of Surgery

Medical School

  • Ross University School of Medicine, Portsmouth, Dominica


  • Rutgers University, Newark, NJ


  • General Surgery, Easton Hospital, Easton, PA


  • Surgery, Indiana University, Indianapolis, IN


  • Trauma and Critical Care, Yale University, New Haven, CT

About Me

John "Joao" Lopes, MD, FACS, is a member of Summit Health’s Bariatric (weight loss) Surgery team. Dr. Lopes performs a wide range of general and minimally invasive surgical procedures and has expertise in general and advanced laparoscopic surgery which includes gallbladder disease, cancers of the stomach, small intestines, and colon (diverticulitis), weight loss surgery, hernias of the abdominal wall and tumors located in the abdomen.

From an early age, Dr. Lopes had a passion for helping others, and his volunteer work as an EMT as a young adult solidified that passion. “As a doctor, helping my patients live their best life is the most rewarding experience,” says Dr. Lopes.

Dr. Lopes spends ample time with each patient and their family answering questions and treating them as he would want his own family to be treated saying, “I listen to the concerns of my patients and present the pathology in a clear manner so he or she can make an informed decision on the plan of care that will work best for them.”

During his surgical residency, Dr. Lopes was author to several published research studies and articles in surgical journals. He is a Board-Certified Diplomate of the American Board of Surgery in the General Surgery American Medical Association. Additionally, he is a Fellow of the American College of Surgeons and member of various medical organizations, including the Society of Laparoendoscopic Surgeons, Society of American Gastrointestinal Endoscopic Surgery, American Society of Metabolic and Bariatric Surgery, Society of Surgery of the Alimentary Tract, and The Eastern Association for the Surgery of Trauma. Dr. Lopes has been honored with the title of Americas Top Surgeon for several consecutive years.

When not taking care of patients, Dr. Lopes can be found fishing in the summer and playing ice hockey with his son in the winter.

Click here to register for Dr. Lopes' Considering Weight Loss Surgery Virtual Seminar

English, Portuguese, Spanish

Hospital Affiliations

  • Overlook Medical Center
  • HUMC Mountainside