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Office
81 Route 4 West -Suite 401
Paramus, NJ 07652Phone+1 201-646-1121Fax+1 201-646-1110
Education & Training
- Rutgers Health/New Jersey Medical SchoolResidency, Surgery, 1991 - 1997
- Rutgers New Jersey Medical SchoolClass of 1991
Certifications & Licensure
- NJ State Medical License 1993 - 2025
- American Board of Surgery Surgery
Awards, Honors, & Recognition
- Inside Jersey Magazine Top Doctors Castle Connolly, 2010-2014
- Top Doctors: New York Metro Area Castle Connolly, 2003-2014
- New York Magazine: Top Minimally Invasive Doctors Castle Connolly, 2002
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Publications & Presentations
PubMed
- 69 citationsShort-Term Results of Laparoscopic Gastric Bypass in Patients with BMI ≥60David Oliak, Garth H. Ballantyne, Richard J Davies, Annette Wasielewski, Hans J. Schmidt
Obesity Surgery. 2002-10-01 - 52 citationsShort-term outcomes for super-super obese (BMI ≥60 kg/m2) patients undergoing weight loss surgery at a high-volume bariatric surgery center: laparoscopic adjustable ga...Daniel J. Stephens, John K. Saunders, Scott Belsley, Amit Trivedi, Douglas R. Ewing
Surgery for Obesity and Related Diseases. 2008-05-01 - 172 citationsLaparoscopic Roux-en-Y gastric bypass: defining the learning curve.David Oliak, Garth H. Ballantyne, Philip A. Weber, Annette Wasielewski, R.J. Davies
Surgical Endoscopy. 2003-03-01
Press Mentions
- Center for Bariatric Medicine and Surgery at Hackensack University Medical Center Achieves National Re-Accreditation from the Metabolic and Bariatric Surgery Accreditation and Quality Improvement ProgramMay 20th, 2019
- Post Pandemic Obesity Posing a New Challenge for AmericansDecember 14th, 2021
- Hackensack University Medical Center Holds Ribbon Cutting on a New Center for Weight Loss and Metabolic HealthOctober 13th, 2023
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