Team Members
 Surgeons
Recently, the Bariatric Surgery Program at
the Hospital of the University of Pennsylvania
was recognized as a Center of
Excellence by the American Society for Bariatric
Surgery.
 Noel
N. Williams, MD, FRCSI
Director, Penn
Bariatric Surgery Program
Dr. Williams was appointed to the Penn Faculty
in 1997. As well as being a gastrointestinal
surgeon, Dr. Williams is the director
of both the William T. Fitts Surgical Education
Center and the Center for Minimally Invasive
Therapy at Penn. His principle clinical interests
are gastrointestinal surgery including inflammatory
and neoplastic disorders of the gastrointestinal
tract, as well as minimally invasive surgery.
 Steven
E. Raper, MD, FACS
Dr. Raper was appointed to the faculty of the
Department of Surgery at the University of Pennsylvania
in 1993, after serving on the surgical faculty
of the University of Michigan for six years. He
is currently an associate professor of surgery.
Dr. Raper has extensive experience in performing
the open roux-en-Y gastric bypass and special
expertise in revising previously failed bariatric
procedures of all types.
Nurse Practitioners
Katie Foster-Kilgarriff, MSN, CRNP,
Program Coordinator
Katie is a nurse practitioner with 10 years
of experience in caring for surgical patients.
She received her master’s degree from
the University of Pennsylvania and worked as
a kidney and pancreas transplant nurse practitioner
at the Hospital of the University of Pennsylvania.
Katie then worked as an occupational medicine
nurse practitioner at Penn Presbyterian Medical
Center and returned to general surgery at the
Hospital of the University of Pennsylvania as
clinical coordinator/program manager of the
Bariatric Surgery Program in February 2005.
Diane Filter, MSN, MPH, CRNP
Diane Filter is a Family Nurse Practitioner with
ten years varied experience. After completing
a Bachelor of Science in Nursing at Roberts
Wesleyan College, she began her career as a
staff nurse on the orthopedic unit of Strong
Memorial Hospital in Rochester, New York. She
then transferred to the Trauma Surgical Intensive
Care Unit at the Hospital of the University
of Pennsylvania, where she worked for three
years. Diane later enjoyed relief and public
health work in several developing countries
before moving to New York City in 2001. While
in New York, she obtained dual master degrees
in both nursing and public health at Columbia
University. She worked as a critical care nurse
at Columbia Presbyterian Medical Center before
returning to Philadelphia to work as a Nurse
Practitioner in the Bariatric Surgery Program
in June 2005.
Angela Votodian MSN, CRNP
Angela received her bachelor of science in nursing
from the University of Delaware in 1997. She has
practiced as a clinical nurse in neuroscience,
cardiology, and general surgery. She received
her master of science in nursing from the University
of Pennsylvania in 2002, and currently specializes
in gastrointestinal and bariatric surgery at the
Hospital of the University of Pennsylvania. Angela's
focus is on inpatient care of postoperative patients.
Business Director GI Surgery, Department
of Surgery
Julie Koehler, Business Director GI Surgery, Department of Surgery
Julie is an experienced
healthcare manager
with more than
25 years experience
in two major academic
healthcare facilities
in Philadelphia.
She has worked
at Penn for ten
years working closely
and collaboratively
with surgeons,
colleagues and
staff managing
the clinical ambulatory
practices of the
Department and
most recently the
Division of GI
Surgery and the
Bariatric Surgery
Program.
She is
responsible for
all regulatory
aspects of the
Department of Surgery
outpatient clinical
operations including
JCAHO and HIPAA
standards. Julie
obtained her master’s
degree in business
at LaSalle University
and has served
as President of
the National Association
of Academic Surgical
Administrators.
Weight and Eating Disorders Center Psychologists
Clinical Nutrition Support
Rachel Griehs, MS, RD
Rachel is a registered dietitian and received
her master's degree in clinical nutrition from
New York University. She is also certified in
adult weight management through the American Dietetic
Association. Rachel has been the clinical specialist
for the bariatric surgery program since January
2002. She works with all of the bariatric patients
and coordinates their medical course with the
surgeons.
Wanda Rooney, MS, Diet
Technician
Wanda earned her master's degree in human nutrition
at the Agriculture Academy in Warsaw, Poland.
She received a verification of this degree from
Immaculata College in Pennsylvania. Wanda has
worked as the diet technician for the bariatric
surgery program since September 2002.
Outpatient Clinical Nurse
Samantha Warner Grimsley,
RN
Samantha is a registered nurse with 13 years of
nursing experience at the Hospital of the University
of Pennsylvania. She has worked with bariatric
patients during their postoperative recovery for
many years. Samantha recently joined the bariatric
program and assists with outpatient management
and patient education.
Physical Therapist
- Robin Stott-McNulty,
MSPT
Social Worker
Clinical Resource Management/Discharge Planning
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