Michael Allen Schweitzer, M.D.

Headshot of Michael Allen Schweitzer
  • Director, Johns Hopkins Center for Bariatric Surgery
  • Associate Professor of Surgery


Bariatric Surgery, Colon Surgery, Diseases of the Small Bowel and Colon, Gallbladder Diseases, Gallbladder Surgery, Gastric Bypass Surgery, Gastric Pacemaker Surgery, General Surgery, GERD Surgery, Heartburn, Hernia Repair, Hernia Surgery, Hernias, Incisional Hernia Repair, Inguinal Hernia, Lap Band Surgery, Laparoscopic Bariatric Surgery, Laparoscopic Gastric Banding, Laparoscopic Roux-en-y Gastric Bypass, Minimally Invasive Surgery, Nissen Fundoplication, Obesity, Pancreatic Diseases, Pancreatic Surgery, Paraesophageal Hernia, Robotic Surgery, Sleeve Gastrectomy, Surgery, Weight Loss Surgery ...read more

Research Interests

Minimally-invasive surgery; Transoral endoscopic surgery (no scar surgery); Laparoscopic surgery; Bariatric surgery; Prevention of deep venous thrombosis; Surgical outcomes after laparoscopic surgery ...read more

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Main Phone

Outside of Maryland & Washington D.C.

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Johns Hopkins Bayview Medical Center

Appointment Phone: 410-550-0409
4940 Eastern Avenue
Baltimore, MD 21224 map
Phone: 410-550-0409

Johns Hopkins Medicine - Green Spring Station

Appointment Phone: 410-550-0409
10753 Falls Road
Pavilion II Suite 305
Lutherville, MD 21093 map


Michael Schweitzer, M.D., developed the laparoscopic bariatric surgery programs at the Medical College of Virginia (one of the first ten laparoscopic gastric bypass programs in the country), Georgetown University, Sinai Hospital of Baltimore and the Johns Hopkins University. Dr. Schweitzer was the first surgeon in the mid-Atlantic area to perform laparoscopic Roux-en-Y gastric bypass and the first in Maryland to perform laparoscopic adjustable gastric band surgery and laparoscopic duodenal switch with biliopancreatic diversion.

Currently chair of the membership committee for the American Society of Bariatric Surgeons, Dr. Schweitzer also serves as a site inspector for the American College of Surgeons Bariatric Center of Excellence Program. He serves on three editorial boards: the Journal of Laparoendoscopic and Advanced Surgical Techniques, Surgery for Obesity and Related Diseases the official journal of the American Society of Bariatric Surgeons) and Bariatric Times.

Dr. Schweitzer was the first to ever publish a technique for endoscopic stoma reduction using transoral endoscopic suturing. A great deal of attention is focused on the future of transoral surgery to avoid abdominal incisions for routine surgery ("No-Scar Surgery"). Dr. Schweitzer is one of the first to apply this technology to bariatric patients.

A writer of numerous papers, chapters and review articles on bariatric surgery, several of Dr. Schweitzer''s laparoscopic bariatric surgical techniques have been featured in the American College of Surgeons Cine Video Series. He is considered an international expert on venous thromboembolic complications after bariatric surgery and has one of the lowest complication rates documented in world surgical literature.

Dr. Schweitzer currently has an extremely active laparoscopic bariatric practice that includes laparoscopic Roux-en-Y gastric bypass, laparoscopic adjustable gastric band, laparoscopic sleeve gastrectomy, laparoscopic duodenal switch with biliopancreatic diversion, and revision of previous surgery.

The team at the Johns Hopkins Center for Bariatric Surgery has successfully completed over 2500 bariatric procedures.

...read more


  • Director, Johns Hopkins Center for Bariatric Surgery
  • Associate Professor of Surgery

Departments / Divisions

Centers & Institutes



  • MD; University of Maryland School of Medicine (1991)


  • General Surgery; Case Western Reserve University Hospitals Cleveland Medical Center (1996)

Board Certifications

  • American Board of Surgery (General Surgery) (1997)

Research & Publications

Selected Publications

Amir RA, Al-Khuraishi, Clark, Solga SF, Torbenson M, Tabesh A, Schweitzer M, Diehl AM, Magnuson TH. Race and co-morbid factors predict NAFLD histopathology in severely obese patients. Surgery of Obesity and Related Diseases. 2005; 1: 6-11.

Schweitzer MA, Lidor A, Magnuson TF, Incision-free minimally invasive gastric surgery. Bariatric Times. 2005; 2: 25-30.

Shermak MA, Chang D, Magnuson T, Schweitzer M, An Outcomes Analysis of Patients Undergoing Body Contouring Surgery after Massive Weight Loss. Plastic and Reconstructive Surgery 2006;118:1026-31.

Schweitzer MA, Lidor A, Magnuson TH. 251 consecutive laparoscopic gastric bypass operations using a 2 layer gastrojejunostomy technique with a zero leak rate. J Laparoendosc Adv Surg Tech A. 2006; 16:83-87.

Chamberlain A, Cheung D, Fobi M, Groh E, Jordan P, Khalili T, Rosenthal R, Rowen L, Schweitzer M, Swartz E, Tyler R. Urgent and Emergent Management of Postoperative Bariatric Surgery Patients. Bariatric Nursing and Surgical Patient Care. 2006; 1:5-14.

Lum YW, House MG, Hayanga AJ, Schweitzer MA Post-Cholecystectomy Syndrome In The Laparoscopic Era Laparoendosc Adv Surg Tech A. 2006;16:482-5.

Schweitzer MA, Gandsas A, Steele, K, Lidor A, Magnuson TH. Vessel Sealing Energy Devices Used In Laparoscopic Bariatric Surgery. Bariatric Times 2006; 3:14-15.

Schweitzer MA, Steele, K, Lidor A, Failure of the Adjustable Gastric Band System Due To A Leak Of Saline. Surgery of Obesity and Related Diseases 2006;2:413.

Steele K, Schweitzer MA, Lidor A, Magnuson TH. An Unusual Case Of A Gastric Bezoar Causing Obstruction After Roux-en-Y Gastric Bypass. Surgery of Obesity and Related Diseases 2006;2:536-537.

Schweitzer MA, Steele K, Lidor A, Magnuson TH. Acute Vena Cava Thrombosis after Placement of Retrievable IVC Filter Prior to Laparoscopic Gastric Bypass Surgery of Obesity and Related Diseases 2006;2: 661-663.

Steele, Schweitzer MA, Lidor A, Magnuson TH. Venous Thromboembolism following Laparoscopic Roux-en-Y Gastric Bypass. Bariatric Times 2006;3:8-9.

Davis LM, Cheskin LJ, Contoreggi C, McCullough K, Hope BT, Aja SM, Schweitzer MA, Steele KE, MoranTH. Dopamine agonism improves behavioral and peripheral parameters in obese rodent models. (Submitted June 2006).

Gandsas A, Schweitzer MA. Bariatric centers of excellence as another pay-forperformance program Laparoscopy Today 2006;5:5-10.

Collins BJ, Miyashita T, Schweitzer M, Magnuson T, Harmon JW, Why Roux-en-Y, Archives of Surgery (Accepted after minor revision Feb 2007)

Activities & Honors


  • Fellow, The American College of Surgeons
  • Society of American Gastrointestinal Endoscopic Surgeons
  • American Society for Bariatric Surgery
  • Med Chi, The Maryland State Medical Society

Videos & Media

Play Video:

Surgical Weight Loss Options 101

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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