Skip to main content
Sivamainthan Vithiananthan, MD, General Surgery, Providence, RI

SivamainthanVithiananthanMDFACS, FICS, FASAMBS

General Surgery Providence, RI

Bariatric Surgery, Trauma Surgery & Surgical Critical Care, Minimally Invasive Surgery

Chief of Minimally Invasive and Bariatric Surgery at The Miriam Hospital, RI Director, Center for Bariatric Surgery at Rhode Island and Miriam Hospitals

Dr. Vithiananthan is on Doximity

As a Doximity member you'll join over a million verified healthcare professionals in a private, secure network.

  • Connect with other colleagues in the same hospital or clinic
  • Search all U.S. specialist profiles and refer a patient
  • Read the latest clinical news and earn CME/CEU credits

See Dr. Vithiananthan's full profile

Already have an account?


  • Siva Vithiananthan, MD FACS FICS is a general surgeon with expertise in advanced laparoscopic surgery. He specializes in minimally invasive procedures including hernia repairs, splenectomies, adrenalectomies, gallbladder and biliary surgery, colon, stomach, anti reflux, motility-disorder related surgery and intestinal surgery, as well as gastric bypass, sleeve gastrectomy and lap-band procedures.

    Prior to joining the staff at The Miriam Hospital, Vithiananthan was director for the Surgical Weight Loss Program at Winthrop University Hospital in Long Island, NY. In addition, he was Winthrop’s site director of the surgical residency and medical student program affiliated with the State University of New York (SUNY) at Stony Brook School of Medicine, where he also served as an assistant professor of clinical surgery.

    Vithiananthan performed a fellowship in advanced laparoscopic surgery at New York Presbyterian Hospital, as well as a fellowship in surgical critical care at Hartford Hospital. He completed his residency in general surgery at Baystate Medical Center-Tufts University School of Medicine and earned his medical degree from Columbia University College of Physicians and Surgeons.
    Vithiananthan has received several accolades for his commitment to the education of medical students and residents. He has published several professional papers and has been selected to present at a number of national meetings on bariatric and advanced laparoscopic surgery. His current research interests include the metabolic effects of surgical weight loss surgery and integrating advanced laparoscopic skills training in residency programs.

Education & Training

  • New York Presbyterian Hospital
    New York Presbyterian HospitalPost-Doctoral Fellowship, Advavanced Laparoscopic Surgery Fellowship, 1999 - 2000
  • University of Connecticut School of Medicine
    University of Connecticut School of MedicineFellowship, Surgical Critical Care, 1998 - 1999
  • UMass Chan - Baystate
    UMass Chan - BaystateResidency, Surgery, 1993 - 1998
  • Columbia University Vagelos College of Physicians and Surgeons
    Columbia University Vagelos College of Physicians and SurgeonsClass of 1993
  • State University of New York, College at FredoniaNo Degree, 1987 - 1988
  • University of JaffnaNo Degree, 1986 - 1987

Certifications & Licensure

  • RI State Medical License
    RI State Medical License 2007 - 2022
  • OR State Medical License
    OR State Medical License 2000 - Present
  • NY State Medical License
    NY State Medical License 1999 - 2023
  • MA State Medical License
    MA State Medical License 1994 - 2023
  • American Board of Surgery Surgery
  • American Board of Surgery Surgical Critical Care

Awards, Honors, & Recognition

  • Vice-President International College of Surgeons, US section
  • Riesman Excellence in Teaching Award The Miriam Hospital, 2013
  • CMS Meaningful Use Stage 1 Certification All in One EMR, Medstreaming, 2013
  • Join now to see all

Publications & Presentations


Journal Articles

  • Ecological Momentary Assessment (EMA) of Recommended Postoperative Eating and Activity Behaviors  
    Thomas G; Bond, DS; Ryder BA; Leahey TM; Vithiananthan SV; Roye GD, Ring R, International Journal of Behavioral Medicine, 3/1/2013
  • Self-reported and objectively measured sedentary behaviors in bariatric surgery candidates  
    Bond DS, Thomas JG, Unick JL, Raynor HA, Vithiananthan S, Wing RR, Surgery for Obesity and Related Diseases, 1/1/2013
  • A Case-Controlled Matched-Pair Cohort Study of Single Incision and Conventional Laparoscopic Gastric Band Patients in a Single US Center with 1 year Follow-up  
    Vithiananthan S, Gero D, Zhang JY, Machan JT, Surgical Endoscopy, 7/26/2012
  • Join now to see all

Books/Book Chapters

  • Join now to see all


  • A brief physical activity intervention improves preoperative health-related quality of life in bariatric surgery patients: Results from the Bari-Active randomized cont...
    Bond DS, Thomas JG, King WC, Trautvetter J, Vithiananthan S, Pohl D, Giovanni J, Ryder BA, Roye GD, Wing RR, 30th Annual Meeting Meeting of the American Society for Metabolic and Bariatric Surgery; American Society of Metabolic and Bariatric Surgery (ASMBS)/Obesity Week, Atlanta, GA, 11/1/2013
  • Bari-Active: a randomized controlled trial of a preoperative behavioral intervention to increase physical activity in bariatric surgery patients.
    Bond DS, Trautvetter J, Thomas JG, Unick JL, Vithiananthan S, Jakicic JM, Pohl D, Giovanni J, Ryder BA, Roye GD, Wing RR, 30th Annual Meeting Meeting of the American Society for Metabolic and Bariatric Surgery; American Society of Metabolic and Bariatric Surgery (ASMBS)/Obesity Week, Atlanta, GA, 11/1/2013
  • Time to Eliminate Long Duration Preoperative Medically Supervised Weight Loss: A Money Loser Without Clinical Benefits. Poster
    Maloomian KS, Roye GD, Ryder BA, Metro SE, Armstrong KC, Rajadurai S, Vithiananthan S, 30th Annual Meeting Meeting of the American Society for Metabolic and Bariatric Surgery; American Society of Metabolic and Bariatric Surgery (ASMBS)/Obesity Week, Atlanta, GA, 11/1/2013
  • Join now to see all


  • Surgeon directed endoscopic interventions during and after laparoscopic bariatric and revisional foregut surgery. 
  • Laparoscopic suture training in a US Residency Program. Laparoscopic Sewing – Interdisciplinary Considerations Session 
  • Cost effective set up for single site surgery using traditional laparoscopic instruments. 
  • Join now to see all


Professional Memberships

Other Languages

  • Tamil