Dr. O'Malley is an Assistant Professor of Clinical Surgery at the University of Rochester Medial Center and the Director of Bariatric Surgery at Highland Hospital. He has been a bariatric surgeon since 1996 and has performed nearly 10,000 bariatric surgical procedures. He introduced Laparoscopic Bariatric surgery to the region in 2000.

He was certified by the American Board of Surgery in 1997.

Dr. O'Malley performs multiple types of Bariatric procedures depending on an individual patients need. He is experienced in Laparoscopic Gastric Bypass, Open Gastric Bypass, Laparoscopic Duodenal Switch, Open Duodenal Switch, Banded Gastroplasty, Laparoscopic Gastric Banding and Laparoscopic Sleeve Gastrectomies. Dr. O'Malley performs the largest number of Bariatric procedures in New York.

Dr O'Malley has traveled within the Region and internationally to teach and demonstrate advanced Laproscopic techniques in Bariatric Surgery. He has mentored and trained numerous surgeons to perform Bariatric Surgery profession. Recently, Dr. O'Malley has been featured on the Oprah Winfrey show and was asked to contribute to Good Housekeeping/Redbook magazine in 2009 as a subject matter expert.

Dr. O'Malley is actively involved in improving the Quality of patient care at Highland Hospital. He has been Co-Chair of the Surgical Quality Committee and is a Surgical Representative for the Credentialing Committee. He is the Medical Director of the Bariatric Fellowship program.

- Dr. O'Malley is a member of the Fellow American College of Surgeons 1999-Present
- Past president New York State Chapter, ASMBS 2017-2019
- Rochester Surgical Society, 1999- Present ( Past President)
- Monroe County Medical Society 2001-Present
- American Society of Metabolic and Bariatric Surgery, 2001-Present

Certified Specialties

Surgery (General Surgery) - American Board of Surgery

Faculty Appointments

Assistant Professor of Clinical Surgery - Department of Surgery, Bariatric/GI (SMD)

Credentials

Residency & Fellowship

Residency, Surgery (General Surgery), University of Rochester School of Medicine GME. 1992 - 1996

Internship, Surgery (General Surgery), State University of New York College at Buffalo. 1991 - 1992

Education

MD | SUNY Health Science Center-Stony Brook (USA). 1991

Publications

Journal Articles

Bioabsorbable glycolide copolymer staple-line reinforcement decreases internal hernia rate after laparoscopic Roux-en-Y gastric bypass

Ahmed, A. R., G. Rickards, S. Husain, J. Johnson, W. O'Malley, and T. Boss.

Obes Surg. 2008; 18: 797-802.

Temporal and demographic factors influencing the desire for plastic surgery after gastric bypass surgery

Gusenoff, J. A., S. Messing, W. O'Malley, and H. N. Langstein.

Plast Reconstr Surg. 2008; 121: 2120-2126.

Roux limb obstruction secondary to constriction at transverse mesocolon rent after laparoscopic Roux-en-Y gastric bypass

Ahmed, A. R., G. Rickards, S. Messing, S. Husain, J. Johnson, T. Boss, and W. O'Malley.

Surg Obes Relat Dis. 2008; .

Post-bariatric surgery reconstruction: patient myths, perceptions, cost, and attainability strategies

Gusenoff, J. A., R. P. Pennino, S. Messing, W. E. O'Malley, T. J. Boss, and H. N. Langstein.

Plast Reconstr Surg. 2008; 122: 1e-9e.

Patterns of plastic surgical use after gastric bypass: who can afford it and who will return for more

Plast Reconstr Surg 122:951-958.

2008; 122: 951-958.

Accessing the common bile duct after Roux-en-Y gastric bypass

Ahmed, A. R., S. Husain, N. Saad, N. C. Patel, D. L. Waldman, and W. O'Malley.

Surg Obes Relat Dis. 2007; 3: 640-643.

Small-bowel obstruction after laparoscopic Roux-en-Y gastric bypass: etiology, diagnosis, and management

Husain, S., A. R. Ahmed, J. Johnson, T. Boss, and W. O'Malley.

Arch Surg. 2007; 142: 988-993.

Cholecystectomy during laparoscopic gastric bypass has no effect on duration of hospital stay

Ahmed, A. R., W. O'Malley, J. Johnson, and T. Boss.

Obes Surg. 2007; 17: 1075-1079.

Trends in internal hernia incidence after laparoscopic Roux-en-Y gastric bypass

Ahmed, A. R., G. Rickards, S. Husain, J. Johnson, T. Boss, and W. O'Malley.

Obes Surg. 2007; 17: 1563-1566.

CT scan diagnosis of bleeding peptic ulcer after gastric bypass

Husain, S., A. R. Ahmed, J. Johnson, T. Boss, and W. O'Malley.

Obes Surg. 2007; 17: 1520-1522.

Internal hernia with Roux loop obstruction during pregnancy after gastric bypass surgery

Ahmed, A. R., and W. O'Malley.

Obes Surg. 2006; 16: 1246-1248.

Laparoscopic Roux-en-Y gastric bypass in a patient with situs inversus

Ahmed, A. R., and W. O'Malley.

Obes Surg. 2006; 16: 1392-1394.

Laparoscopic Roux-en-Y Gastric Bypass and Its Early Effect on Blood Pressure.

Ahmed, A. R., G. Rickards, D. Coniglio, Y. Xia, J. Johnson, T. Boss, and W. O'Malley.

Obes Surg. .

Ratings & Comments

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Ratings

During this visit, did this provider spend enough time with you?

4.6

During this visit, did this provider show respect for what you had to say?

4.1

During this visit, did this provider give you easy to understand information about these health questions or concerns?

4.3

During this visit, did this provider listen carefully to you?

4.4

During this visit, did this provider explain things in a way that was easy to understand?

4.5

Patient Comments

5.0

Good.

Jan 29, 2024

5.0

Dr. OMalley is absolutely amazing

Dec 10, 2023

1.0

Provider would not discuss pros & cons of both types of surgery. He consistently repeated "what can I help you with today" or "what questions can I answer". Yet, I never felt my questions were answered.

Jul 25, 2023

2.6

Dr. O'Malley simply has no bedside manners at all. I had several questions that he answered while he back was to me and he was typing, however, he answered them as if I was asking the least important questions in the world and that they were an Inconvenience to him. I keep reminding myself that he is an excellent surgeon and hopefully I won't see him again after this.

Dec 19, 2022

4.6

Kind person.

Sep 26, 2022

1.8

Tried to ask him a question and he cut me off before I could get my thought out fully. Didn't even make eye contact with me as he entered the room or talked to me.[...] Feel very discouraged and he has to still perform the surgery.

Jul 23, 2022

2.6

This care provider is very confident in what he does but does not have any kind of bedside manner. Questions asked were answered by repeating what he already said as if we didn't understand the first time instead of listening to the question and explaining or giving more information. He seems to want to provide as little and perfunctory information as possible rather than help patient understand the situation or problem. I Think he does a good job at what he does but he does not seem to enjoy or have patience talking to his patients. I would recommend him for his skill but certainly not for any kind of bedside manner.

Jul 10, 2022

5.0

I want this man doing the surgery not the best bedside manner.

Jun 23, 2022

2.5

Seem to be in a hurry!

Feb 28, 2022