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Our Staff

Heidi works with both the pre-op and post-op bariatric surgery patients, discussing the importance of proper nutrition both before and after bariatric surgery. She performs nutritional evaluations on patients prior to surgery, explaining all aspects of the post-op bariatric diet, including behavior modification, life-style and long-term dietary changes. She also works with patients going through non surgical weight management program. Working with the patients, Heidi helps them in understanding and following a healthy and balanced diet.

“I am very excited and proud to be a part of the Bariatric Program here at UPMC Hamot Medical Center. It is a privilege for me to be able to help patients make the right dietary changes and provide them with nutritional support and guidance that will ultimately lead to a healthy lifestyle.”......Heidi


Heidi E. Gianaris
Bariatric Nutritionist

Dr Amjad Ali

Dr Amjad Ali

Director of Bariatric Surgery


Dr Muhammad Asad

Dr Muhammad Asad

General and Bariatric Surgeon


Dr Jawaid Kalim

Dr Jawaid Kalim

General and Bariatric Surgeon


Tracy Langer

Tracy Langer

Office Manager


Valerie Snyder

Valerie Snyder

Program Coordinator


Therese Christiansen

Therese Christiansen

Nurse Practitioner


Lindsey Walker

Lindsey Walker

Office Nurse


Bethann Yezzi

Bethann Yezzi

Medical Assistant


Mary Mehler/Churchill

Mary Mehler/Churchill

OR Scheduler


Kelsey Trayer

Kelsey Trayer

Receptionist


Angel Sunafrank

Angel Sunafrank

Nurse Practitioner


Karen Kelley

Karen Kelley

Nurse Practitioner


Fely Heibel

Fely Heibel

Medical Assistant


Lauren Fosco

Lauren Fosco

Office Assistant


Rose Bristow

Rose Bristow

Medical Assistant


Nicole Lewis

Nicole Lewis

Receptionist