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1521. Kingsley Okai, MD
Practicing Surgeon
Surgeries Performed
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Biliopancreatic Diversion 
• Laparoscopic Sleeve Gastrectomy 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 
• Laparoscopic Roux-en-Y Gastric Bypass 

Practice Location
7910 W Jefferson Blvd Ste 112
Suite 112
Fort Wayne, IN 46804-4159

Phone: (260) 969-7121

1522. Allan Okrainec, MD MHPE FRCSC FACS
Practicing Surgeon
Surgeries Performed
• Laparoscopic Sleeve Gastrectomy 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
217 Lake Shore Dr 399 Bathurst St. 8MP-325
Toronto, ON M8V 2A5

Phone: (416) 603-5224

1523. Jarrod Olafson, MD
Member
Surgeries Performed
• Laparoscopic Sleeve Gastrectomy 
• Roux-en-Y Gastric Bypass 


1524. John Oldham, MD
Practicing Surgeon
Surgeries Performed
• Bariatric Endoscopy Procedures 
• Follows Other Surgeons' Patients 
• Gastric Banding 
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Biliopancreatic Diversion 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• One Anastomosis Gastric Bypass 
• Other Gastric Bypass 
• Other Gastric Restriction 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
950 Breckenridge Ln Ste 10
Louisville, KY 40207-5931

Phone: (502) 894-9499

1525. Alejandro Oliu, MD
Practicing Surgeon
Surgeries Performed
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 

Practice Location
1400 Madison Ave
Suite 100AA
Mankato, MN 56001-5473


1526. Rodrigo Otavio Oliveira, MDPhD FACS
Member
Surgeries Performed
• BPD w/ Duodenal Switch 
• Bariatric Endoscopy Procedures 
• Gastric Banding 
• Intragastric Balloon 
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• One Anastomosis Gastric Bypass 
• Other Gastric Bypass 
• Pediatric (Patients Under 18) 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
Rua Duarte Galvão 54 Lisbon
Lisboa, 1549-008

Phone: 351934426720

1527. Edward Oliveros, MD FPCS FACS MHM
Practicing Surgeon
Surgeries Performed
• Follows Other Surgeons' Patients 
• Gastric Banding 
• Intragastric Balloon 
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• Pediatric (Patients Under 18) 
• Revision/Conversion of Prior Procedure 

Practice Location
MAB 333, 32nd St
Bonifacio Global City
Taguig City, 1634


1528. Christopher Olukoga, MD
Practicing Surgeon
Surgeries Performed
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 

Practice Location
1292 Heavenly Cv
Winter Park, FL 32792-1302


1529. Omowunmi Oluwo, MD
Member

1530. Philip Omotosho, MD
Practicing Surgeon
Surgeries Performed
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• Revision/Conversion of Prior Procedure 

Practice Location
1725 W Harrison St
POB Suite 810
Chicago, IL 60612-3823

Phone: (312) 942-5500

1531. Eittel Oppenheimer, MD FACS
Practicing Surgeon
Surgeries Performed
• Gastric Banding 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 

Practice Location
4600 SW 46th Ct Ste 310
Unit 310
Ocala, FL 34474-5755


1532. Horacio Oria, MD
Practicing Surgeon
Practice Location
86 Legend Ln
Houston, TX 77024-2404

Phone: (713) 464-2966

1533. Marshall Orloff, MD
Practicing Surgeon
Surgeries Performed
• Follows Other Surgeons' Patients 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 

Practice Location
200 W Arbor Dr Frnt
San Diego, CA 92103-9000

Phone: (619) 543-5865

1534. Jorge Orrego, MD
Member
Surgeries Performed
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• One Anastomosis Gastric Bypass 


1535. Ariel Ortiz Lagardere, MD FACS
Practicing Surgeon
Surgeries Performed
• BPD w/ Duodenal Switch 
• Bariatric Endoscopy Procedures 
• Follows Other Surgeons' Patients 
• Gastric Banding 
• Intragastric Balloon 
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• One Anastomosis Gastric Bypass 
• Other Gastric Restriction 
• Pediatric (Patients Under 18) 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
Paseo de los Heroes 9111-100
Zona Urbana Rio
Tijuana, 22010

Phone: (866) 376-7849

1536. Andres Ospina, MD
Member
Surgeries Performed
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• Revision/Conversion of Prior Procedure 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
Cll 140 # 6-15 Ed. Monteloma 2 Ap 401
Bogota, 110121

Phone: (601) 615-8311

1537. Alexander Ostapenko, MD
Practicing Surgeon
Surgeries Performed
• Laparoscopic Sleeve Gastrectomy 
• Roux-en-Y Gastric Bypass 

Practice Location
1000 South Ave # 95
BOX 95
Rochester, NY 14620-2733


1538. Merlin Otteman, MD
Practicing Surgeon
Practice Location
7240 Whitworth Ct
Fort Collins, CO 80528-8890

Phone: (970) 204-0889

1539. Rodolfo Oviedo, MD FACS FRCS FICS DABS-FPDMBS
Practicing Surgeon
Surgeries Performed
• Bariatric Endoscopy Procedures 
• BPD w/ Duodenal Switch 
• Follows Other Surgeons' Patients 
• Gastric Banding 
• Intragastric Balloon 
• Laparoscopic Biliopancreatic Diversion 
• Laparoscopic BPD w/ Duodenal Switch 
• Laparoscopic Roux-en-Y Gastric Bypass 
• Laparoscopic Sleeve Gastrectomy 
• One Anastomosis Gastric Bypass 
• Other Gastric Bypass 
• Other Gastric Restriction 
• Revision/Conversion of Prior Procedure 
• Roux-en-Y Gastric Bypass 
• Single Anastomosis Duodeno-ileostomy 

Practice Location
4848 NE Stallings Dr
Ste 201
Nacogdoches, TX 75965

Phone: (936) 221-5560

1540. E. R. T. C. Owen, MD
Member
Practice Location
Forest Road, Horsham
West Sussex, RH12 4HL

Phone: 01403242904