Meet Our Doctors

Nathan Allison, MD
NewFit Surgeon
Kenneth Tieu, MD
NewFit Surgeon
Peter Walker, MD
NewFit Surgeon

Nathan Allison, MD

Laparoscopic, General, & Bariatric Surgery

"After surgery, patients are off
their meds. They're able to walk, jog,
exercise - do things they were never able
to do before. And that's very rewarding."

Medical School: University of Florida College
of Medicine

Internship and Residency: University of Texas,
Houston

Fellowship: University of Texas, Houston
Minimally-Invasive Surgery, Endoscopic Surgery,
Robotics-assisted Surgery

Board Certification: The American Board of Surgery — General Surgery

Additional Focuses:
Revisional Bariatric Surgery
Minimally-Invasive Surgery: Reflux Surgery, Gastric, Gallbladder, Colorectal, Abdominal, Hernia Repair
Endoscopic Surgery
Robotic Surgery: General and Bariatric

Kenneth Tieu, MD

Laparoscopic and Robotic General
& Bariatric Surgery

"With bariatric surgery, it is such an
amazing certainty. You see patients
just after their initial post-op visit
and their diabetes is gone, their meds
are cut significantly. Their lifestyle is
changed, they are happier and able to
do things they weren't able to do
before the surgery."

Medical School:The Pennsylvania State University
College of Medicine, Hershey, Pennsylvania

Internship and Residency: University of Texas Health Science Center, Houston

Fellowship: University of Texas Health Science Center, Houston
Minimally-Invasive Surgery, Endoscopic Surgery,
Robotics-assisted Surgery

Board Certification: The American Board of Surgery — General Surgery

Additional Focuses:
Endoscopic Surgery
Minimally-Invasive Laparoscopic General Surgery: Reflux Surgery, Stomach Surgery, Colorectal and Intestinal Disorders, Appendix and Gallbladder removal, Hernia Repair, Adrenal Disorders, Spleen Disorders, and Cancer Surgery
Robotic Surgery: General and Bariatric

Peter Walker, MD

Bariatric and General Surgery

Medical School:The Pennsylvania State University
College of Medicine, Hershey, Pennsylvania

Internship and Residency: University of Texas Health Science Center, Houston

Fellowship: University of Texas Health Science Center, Houston
Minimally-Invasive Surgery, Endoscopic Surgery,
Robotics-assisted Surgery

Board Certification: The American Board of Surgery — General Surgery

Additional Focuses:
Nutrition
Minimally-Invasive Surgery: Reflux Surgery, Gastric, Gallbladder, Colorectal, Abdominal, Hernia Repair
Endoscopic Surgery
Robotic Surgery: General and Bariatric