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Faculty

Faculty and Program Administration

Alan I. Leibowitz, MD, FACP,
Chief Academic Officer in Medical Education at Good Samaritan, was formerly our
Program Director since 1989. He is board-certified in Internal Medicine and
Gastroenterology. Prior to that, he served as Dean for Student Affairs at the
University of South Florida College of Medicine in Tampa and is currently
Professor of Clinical Medicine and Associate Head, Department of Medicine,
University of Arizona College of Medicine.

Cheryl O'Malley, MD,
FACP, is Program Director in the department of Internal Medicine.
Dr. O’Malley is a native of Phoenix and left only shortly to complete her
bachelor’s degree in Biology at the University of Notre Dame in 1994. She
returned to Arizona to receive her M.D.
from the University of Arizona in 1999 and then entered the Combined Internal
Medicine/Pediatrics Residency Program at Good Samaritan and Phoenix Children’s
Hospital. She is board certified in Internal Medicine and Pediatrics.
During her residency, she served as Chief Resident in Pediatrics. In
2003, she joined the faculty at both Phoenix Children’s and Good Samaritan and
currently is our Program Director in Internal
Medicine. She is actively involved with the medical students at the University
of Arizona College of Medicine-Phoenix campus, where she is an Assistant
Professor of Clinical Medicine. Most days, you will find her attending on the inpatient
medicine wards and in both Internal Medicine and Pediatric clinics. She also
sees children at the St. Vincent de Paul
clinic. Her primary focus is inpatient adult medicine, resident
education, the American College of Physicians, and faculty development programs.
If you come to her house for journal club or a “craft night” you will see that
she loves home improvement shows and spending time with her family.
Mary Ellen Dirlam, MD, PhD, MS, serves as
Medical Director of
the Internal Medicine Center at Good Samaritan , also serves as an Associate Director of Internal Medicine. She received her
PhD in Biochemistry from Arizona State University and her master's degree in Clinical Research Design and
Medical Biostatistics from the University of Michigan. She holds a faculty
appointment at the University of Arizona as Assistant Professor of Clinical
Medicine. She is board-certified in Internal Medicine.
Richard
Gerkin, MD, MS is a
clinical faculty member in the Department of Medicine. He has a faculty
appointment at the University of Arizona as Associate Professor of Clinical
Medicine. He received his master's degree in Clinical Research Design and
Medical Biostatistics from
the University of Michigan. He is board certified in Internal Medicine,
Cardiology, and Medical Toxicology. He was formerly the Medical Director of the
Phoenix Fire Department Health Center. He currently teaches evidence-based
medicine, participates in journal clubs of most of the residency and fellowship
training programs, runs the research rotation for 2nd year medical
residents, and offers support to investigators with study design and statistical
analysis. His research interests include neuroimaging in Alzheimer’s Disease
and endothelial dysfunction. His other interests include karaoke, military
strategy, chess, apologetics, spinning and video/music production.
Donna Holland, MD,
is the Program Director of the Combined Internal Medicine/Pediatrics Residency
Program. A native Texan, Dr. Holland
received her medical degree from the University of Texas Health Sciences Center
in Houston in 1992. She came to Phoenix to complete residency training in the
Combined Internal Medicine/Pediatrics Program at Good Samaritan, and has never made it back to Texas. She is board certified in both
Internal Medicine and Pediatrics. She is an Assistant Professor of Clinical
Medicine at the University Of Arizona College Of Medicine and directs the
Combined Medicine/Pediatrics fourth year clinical rotation for medical
students. She is an Associate Program Director for the Pediatrics Residency
Program affiliated with Phoenix Children’s Hospital and Maricopa Medical
Center. She is very involved in resident education, junior faculty development
projects, and community outreach.
Harvey Hsu, MD, is a clinical faculty member in the
Department of Medicine and Director of the Residency Medical Informatics
Department. He is board-certified in Internal Medicine. Dr. Hsu originally
moved to Phoenix in 1974, then went to the University of Washington for his
undergraduate years. After graduating with a degree in Computer Science he
attended medical school at St. Louis University. He completed his
residency at Good Samaritan in 1999 and has been a faculty member since.
Current projects involve web site design, palm pilot programming, and Microsoft
Access database programming. The most exciting project he is working on
currently is implementing the Electronic Health Record system in
the outpatient setting.
Michelle Huddleston, MD,
is an Associate Program
Director of the Combined Internal Medicine/Pediatrics Residency Program. She is
board-certified in Internal Medicine and Pediatrics. A native of North Carolina,
Dr. Huddleston received her bachelor’s degree in Biology at East Carolina
University in 1990 and remained at East Carolina to receive her Doctorate of
Medicine in 1995. She then traveled to Phoenix, Arizona as a newlywed with her
husband, Sam. Michelle completed residency training in the Combined Internal
Medicine/Pediatrics Program at Good Samaritan Regional Medical Center and
Phoenix Children’s Hospital in 1999. She joined the faculty at both Phoenix
Children’s and Good Samaritan where she currently directs the Adolescent
Program. Along with Dr. Randy Christensen, she staffs the Crews‘n Health
Mobile, a mobile van that provides medical care for homeless adolescents. Her
care for the homeless extends to a younger population at the Thomas J. Pappas
Elementary School, a school-based medical clinic for homeless youth. Her
primary focus is adolescent healthcare and resident education. Outside of work
she enjoys scrapbooking, rubberstamping, cooking and spending time with her
family.

Emily
Mallin, MD
is an Academic Hospitalist in the Department of Internal Medicine. She was born and raised in Phoenix, but has traveled far and
wide in pursuit of her medical education. Starting in Tucson, she received her
undergraduate degree in Psychology and Spanish from the University of Arizona.
She then moved to New York where she completed a post-baccalaureate premedical
program from Columbia University. She graduated medical school from the Sackler
School of Medicine at Tel Aviv University in Israel in 2004, before returning to
Phoenix to complete her residency and chief resident year in Internal Medicine at
Good Samaritan. She is board-certified in Internal Medicine and loves that she
gets to teach medical students and residents for a living. Her other loves
include travel and languages, skiing, and hearing her daughter laugh.

Richard Manch, MD, FACP, FACG,
is the Medical Director for both the Samaritan Academic Faculty Association
and the Banner Good Samaritan Liver Transplantation Program. He is also
the Director of the Liver Disease Center at Banner Good Samaritan and the
chairman of the Accreditation Board of the Banner Office of Continuing Medical
Education. He is board-certified in Internal Medicine and Gastroenterology,
and holds a master's degree in Health Administration. Dr. Manch is a Clinical
Professor of Medicine with the University of Arizona College of Medicine.
Peter P. McKellar, MD, FACP
has been an Associate Director of the program since 1977. He is a Clinical
Associate Professor of Medicine at the University of Arizona College of
Medicine. He is board-certified in Internal Medicine and Infectious Diseases.
His interests are in learning and teaching all areas of clinical medicine.

KeriLyn Gwisdalla, MD, is an Associate
Program Director and Director of Recruitment for the Internal Medicine
Residency. She
graduated from the University of Arizona College of Medicine in 1995 and came
to BGSMC where she completed her residency in Internal Medicine in 1998.
Subsequently she served as Chief Resident and joined the faculty in 1999. Dr.
Gwisdalla is the Director of the Internal Medicine Clerkship for the University
of Arizona medical students at BGSMC, and also serves as Assistant Director of
the Internal Medicine Residents' Clinic. She is an Assistant Professor of Clinical
Medicine at the University of Arizona
College of Medicine and is
board-certified in Internal Medicine. Her
current interests
are faculty and resident professional development, and creating and maintaining an excellent environment in which to learn
medicine. Along with Dr. Peterson, she
holds the retreats
"How to Be a Great Resident Workshop I and II
" and promotes a balance between physical, mental and emotional
health during residency. When she's not at work or with her family, you will
usually find her at a yoga class.
Jayne Peterson, MD, FACP
is Director of
the Good Samaritan Internal Medicine Residents' Outpatient Clinic. She obtained her undergraduate
degree in Biology at Arizona State University and medical degree at the
University of Arizona. She did her Internal Medicine residency at Presbyterian
University of Pennsylvania Medical Center in Philadelphia. She is board
certified in Internal Medicine, is an Associate Program Director for the
Internal Medicine Program and an Assistant Professor of Clinical Medicine at the
University of Arizona. Her passion is to teach ambulatory medicine and to care
for the underserved. She feels fortunate to have the perfect job that allows her
to develop the ambulatory curriculum for our Internal Medicine residents and
work with medical students during their Internal Medicine Outpatient rotations
in a clinical setting which cares for the less fortunate. She volunteers at St.
Vincent de Paul Free Clinic. Current projects include participation in the
Arizona Diabetes Initiative which is working to improve Diabetes outcomes in our
state, Internal Medicine faculty development and teaching residents about the
Quality Improvement process.
Gary H. Salzman, MD,
serves as Director of Geriatric Education and Director of the Geriatric Medicine
Fellowship Program. He is board certified in Internal Medicine and Geriatric
Medicine, and is a Certified Medical Director for Long Term Care and a Certified
Clinical Densitometrist. He divides his time between clinical practice,
education of residents and fellows, and serving as Medical Director of an
Alzheimer's Assisted Living Facility and a Home Health Care agency. His clinical
areas of interest include osteoporosis, Alzheimer's Disease and pressure ulcers.
He was recently awarded Geriatrician of the Year by the Arizona
Geriatrics Society.
Brenda Shinar, MD, is Director of the
Preliminary Medicine Residency
Program and an Associate Director of the Internal Medicine Program. She received
her MD from the University of Arizona College of Medicine in 1997, and completed
her residency in Internal Medicine at Good Samaritan in
2000. She served as Chief Resident in Internal Medicine from 2000-2001, and then
joined the faculty as an Academic Hospitalist. She is an Assistant
Professor of Clinical Medicine at the University of Arizona and is board
certified in Internal Medicine. Dr. Shinar enjoys reading, playing the violin,
and anything to do with Cavalier King Charles Spaniel dogs. She grew up in the
Phoenix area and loves living in the southwest where she resides with her
husband, Ron, and their dog, Teddy.

Heather Bartz, DO is an
Assistant Program Director in
Internal Medicine. Dr. Bartz
received her undergraduate degree in Biological Sciences from the University of
California at Davis in 1997. She ventured from Northern California to the
Midwest for medical school and graduated from Kirksville College of Osteopathic
Medicine in 2002. Many of her medical school clinical rotations were in Phoenix
and she fell in love with Arizona as well as the Med-Peds program. In 2006, she
completed the Internal Medicine/Pediatrics Program at Banner Good
Samaritan/Phoenix Children’s/Maricopa Medical Center. During her 4th
year of residency she served as Med/Peds Chief Resident and loved being chief so
much she served as an out of training chief resident for both the Internal
Medicine and Pediatrics Programs.. In July of 2007, she joined the Internal
Medicine/Med-Peds faculty at Good Samaritan/Phoenix Children’s Hospital. You
will find her in many places including the adult medicine inpatient wards and
the outpatient medicine, pediatric and adolescent clinics. Outside of work she
enjoys sprint distance triathlons, hiking, and spending time with her husband
and 2 Jack Russell Terriers.
Sara
C. Stimson, MD is
an
Assistant Program Director in
Internal Medicine.
Dr. Stimson received her undergraduate degree in Biological Sciences from the
University of the Incarnate Word in San Antonio, Texas in 1996. After teaching
high school biology and coaching three sports for a brief stent she travelled to
Houston to complete her medical school training at the University of Texas
Health Science Center in Houston in 2002. The Internal Medicine/Pediatrics
Program in Phoenix was the main draw out of Texas and she completed her combined
training at the the Internal Medicine/Pediatrics Program at Banner Good
Samaritan/Phoenix Children's/Maricopa Medical Center in 2006. Her love for
teaching continued as a combined Internal Medicine/Pediatric Chief Resident
which she completed in 2007. She now has joined the Internal Medicine/Med-Peds
faculty at Banner Good Samaritan/Phoenix Children's Hospital where she spends
time in both the outpatient and inpatient settings and continues to remain
dedicated to the growth and development of young physicians and medical
students. Outside of work she enjoys spending time with her partner, 2 dogs and
cat, listening to music and hiking.
David
Carl Houghton, MD
Dr Houghton grew up
in the beach communities of
Orange County,
California. He graduated from the University of California-Irvine with a BS in biology in 1992
after serving for two years as a missionary in the Spanish-speaking towns of the
Rio Grande
Valley. He was then commissioned as an officer in
the US Public Health Service and attended medical school at the
Uniformed
Services
University in
Bethesda,
Maryland. After receiving his MD degree in 1996, he completed a
Med-Peds residency at Good Sam/Phoenix Children’s, serving as pediatric chief
resident from 1999-2000. Since then he has practiced full spectrum primary care
for the underserved in the Salt Lake City area, frontier emergency medicine in
arctic
Alaska, and community hospital medicine/critical care at
Phoenix
Indian
Medical
Center. He served in the National Health Service
Corps program for disaster preparedness and is now part of the Air Force
Reserve’s aerospace medicine program. He has served as medical school faculty
for the
University of
Utah and currently teaches at the
University of
Arizona. He engages part-time in pediatric urgent
care for Phoenix Children’s Hospital and Good Night Pediatrics, as well as
inpatient/nursery care at Banner Cardon Children’s Hospital. In addition to
working full-time as an Academic Hospitalist on Good Sam’s inpatient teaching service, he is involved with
Banner’s critical care telemedicine program. He and his wife stay busy raising
four teenagers. He enjoys outdoor activities, photography and video production.
Cori
Norgaard, DO
Veterans Affairs Medical Center
VAMC
Hospitalist Physicians
Ruth
Franks, MD
Ruth Franks, M.D.
is an Associate Program Director (APD) of the combined BGSMC and VA Medical
Center residency program at the VA Medical Center where she is also a faculty
hospitalist. She is board certified in Internal Medicine. She received her
undergraduate degree from the University of Arizona in Molecular and Cellular
Biology and then attended the University of Arizona for her medical school
training which she completed in 2004. She moved to Phoenix to complete her
internal medicine residency in 2007 at BGSMC and the VA. Her love of teaching
residents and students was obvious when she accepted a position to be one of the
Junior Faculty/Chief Resident of the same program from 2007-2008. In July 2008
she accepted a position as a faculty hospitalist and APD for the VA. She was
born and raised in Arizona and has truly found a home here in her work and her
play. She loves distance runs on the Phoenix Mountain Preserve with her young
son and husband, entertaining family and friends at her home, skiing (water and
snow), and playing softball.
Christopher Kurtz, M.D.
Christopher Kurtz, M.D. is co-director of the Program at the
VA Medical Center. He is board certified in Internal Medicine and a Clinical
Assistant Professor of Medicine at the University of Arizona Health Sciences
Center. He graduated from the University of Arizona in 1995 with a degree in
molecular and cellular biology. He received his M.D. from the University of
Virginia in 1999; while there he was elected to the Alpha Omega Alpha medical
honor society. He completed his residency in internal medicine at BGSMC/VA
hospital in 2002. When not working hard to educate future physicians he enjoys
world travel, eating at one of the many wonderful restaurants in the Phoenix
area, and satisfying his inner artist by playing the piano and guitar.
Darren
Deering, D.O.
After receiving his Bachelors
of Science degree from Truman State University in 1995, Dr. Deering attended the
Kirksville College of Osteopathic Medicine in Kirksville, Missouri. Following
graduation from K.C.O.M. in 1999, he completed a Traditional Rotating
Osteopathic Internship in Long Beach, California. He then completed a combined
Internal Medicine and Pediatrics Residency at Banner Good Samaritan Medical
Center & Phoenix Children’s Hospital. During his last year of residency, he
served as a Chief Resident in the combined Med/Peds program. Dr. Deering’s
primary interest is in resident and medical student education and he currently
serves as an Associate Program Director for the Internal Medicine Residency at
the VA Medical Center. In addition to teaching, he enjoys traveling, trying new
restaurants and spending time with his family and friends.
Michael
Garrett, M.D.
Dr. Garrett went to medical school at the University of
Washington in Seattle, and did his medical residency training at Maricopa
Medical Center in Phoenix. He is board certified and recertified in both
Internal Medicine and Geriatrics. When he is not reading journals, he is on the
golf course struggling to break 100, on his bike (happy he lives in a city as
flat as Phoenix), in his workshop wondering why the parts aren’t going together,
or in the kitchen trying to perfect another brownie recipe.

Rebecca Hawkins, M.D.
Rebecca Hawkins, M.D. attended the University of
Wisconsin-Madison Medical School and remained there for her residency training.
In 1981 she relocated to Phoenix and was a teaching attending at Maricopa
Medical Center, where she stayed for two years before joining the teaching staff
at the Carl T. Hayden VAMC. She holds a Clinical Assistant Professor of Medicine
position with the University of Arizona. She is board certified in Internal
Medicine. In addition to her love of working with medical students and
residents, her special interest is in end-of-life care as well as the care of
our women veterans. Dr. Hawkins enjoys skiing, scuba diving, exploring our
beautiful state, gardening and making jewelry.
Sangita
Cherukuri, DO
Sangita Cherukuri, DO is a faculty hospitalist from Cleveland,
Ohio. She received her degree in Biology from The Ohio State University in 1999.
She then received her DO from Lake Erie College of Osteopathic Medicine in 2004.
Dr. Cherukuri began her training at UPMC Mercy in Pittsburgh where she completed
her Osteopathic Internship in 2005. She then came to Phoenix to run away from
the snow, and completed her Internal Medicine Residency at BGSMC/Phoenix VA in
2008. In addition to teaching residents and medical students, she enjoys
traveling, cooking, and spending time with family and friends.
Paul Duntley, M.D.
Dr. Duntley is a native of New York State. He attended the
University of Dallas and then S.U.N.Y. Buffalo for Medical School. He relocated
to sunny Arizona for residency and a chief year at St. Joseph’s Hospital and
Medical Center. He then worked for 9 years as a primary care Internist with an
emphasis on Geriatrics in Sun City, Arizona. He is board certified in Internal
Medicine. He has been at the Phoenix Veterans Hospital for 5 years as a teaching
attending with some part-time duties participating in some of the numerous
research projects available at the VA. He enjoys woodworking and numerous
outdoors activities. He is also a Flight Surgeon in the Air Force Reserves.
James V. Felicetta, MD,
is Chief of the Medical Service
at the Carl T. Hayden Phoenix VA Medical Center and is Professor of Clinical
Medicine at the University of Arizona. He is
board-certified in Internal Medicine, Endocrinology, and Geriatrics.
Kim
Martinez, MD Dr.
Martinez grew up in the Atlanta area, earned a bachelor’s degree from Georgia
Tech, and graduated from the Medical College of Georgia as a member of Alpha
Omega Alpha. He completed his Internal Medicine Residency at the combined Good
Samaritan/Phoenix VA Program in 1988 and is Board Certified in Internal
Medicine. Clinical experience has included provision of medical services at the
Arizona State Hospital; attending in both outpatient (Primary Care Clinics,
Immunodeficiency Clinic) and inpatient (ward attending) settings at the Carl
Hayden VAMC; and partnership in private practice in Scottsdale with emphasis on
HIV medicine. He returned to the VA as a full-time teaching hospitalist in
December 2005. Outside interests include cycling and travel, and, whenever
possible, a mixture of the two.
Maricella
Moffitt, MD Dr. Moffitt completed medical school at the University of
Texas Health Science Center in Houston in 1986. She completed residency training
in Internal Medicine at the University of Texas in Houston in 1989 and was
selected as a chief resident in 1990. She joined the faculty in the Department
of Medicine at Maricopa Integrated Health System in June of 1990 and remained
there until 2005. She has held many academic and administrative positions
including: Clerkship Director, Associated Program Director in Internal Medicine
Residency, Co-Program Director Med-Peds Residency, and Director of Medical
Education/Academic Affairs. During her tenure at MIHS she was elected president
of the Medical Staff and served as a medical staff officer from 1998-2003. She
has received numerous teaching and service awards. Currently, she is the
Director of the Doctoring Curriculum at the University of Arizona College of
Medicine Phoenix. She hold the Academic rank of Associate Professor of Medicine.
Tuberculosis and Public Health have always
been interests. Dr. Moffitt obtained a Masters in Public Health from the
University of Arizona in the Charter Class 1993-1994. As part of an internship
project she responded to an RFP from the CDC. She was subsequently funded over
one million dollars for a five year project in clinical trials of new methods
for the treatment of Tuberculosis, in addition she participated in the CDC’s
Tuberculosis Trials Consortium (TBTC.)
Clinically she has practiced and taught
Internal Medicine as faculty at Maricopa Integrated Health System and now at the
Carl T. Hayden VA in Phoenix. She continued to provide TB care at Maricopa
County Public Health Tuberculosis Control which she had done for 16 years
leaving in 2006 to join the faculty at the University of Arizona College of
Medicine Phoenix. She also served as the Chief Medical Officer, TB Control and
as Deputy State Tuberculosis Control Officer.
M. Keith Piatt, MD, is Associate Chief of Staff for
Ambulatory Care at the VA Medical Center and is board-certified in Internal
Medicine.
Critical Care Faculty
Robert A. Raschke, MD, MS, Director of Critical Care
Services at Banner Good Samaritan Medical Center. He holds a faculty
appointment at the University of Arizona as Assistant Professor of Clinical
Medicine. He too, received his master's degree from the University of Michigan
in Clinical Research Design and Medical Biostatistics. He is board-certified in
Internal Medicine and Critical Care Medicine.
Thomas M. Bajo, MD, is Associate Director of Critical Care
Services at Banner Good Samaritan Medical Center and a Clinical Assistant
Professor at the University of Arizona. He is board-certified in Internal
Medicine, Critical Care Medicine and Infectious Disease.
Rebecca Legg, MD, is a staff intensivist. She is board-certified in Internal
Medicine and Critical Care Medicine.
Gregory Chu, MD, is a staff intensivist. He is
board-certified in Internal Medicine and Critical Care Medicine.
Jennifer O'Hea, MD, is a staff intensivist. She is
board-certified in Medicine and Critical Care Medicine.
John
Khazin, MD is a staff intensivist.
Ricki
Long, MD is a staff intensivist
David
Morro, MD is a staff intensivist.
Huw
Owen-Reece, MD is a staff intensivist.
Maria P. Rocha, MD, is a staff intensivist at the VA Medical
Center. She is board-certified in Internal Medicine, Pulmonary Medicine and
Critical Care Medicine.
Clement Singarajah, MD, is Director of Critical Care at
the VA Medical Center. He is board-certified in Internal Medicine, Pulmonary
Medicine and Critical Care Medicine.
Jr Faculty 2008-2009
Lila Ammouri,
MD
Roxanne
GarciaOrr, MD
Allison
Peckumn, DO
Colleen Smith,
MD
Fellowship Directors
Cardiology
Ken Desser, MD - BGSMC
Robert Halligan, MD -VAMC
Interventional Cardiology
Nathan Laufer, MD - BGSMC
Timothy Byrne, DO - BGSMC
Pulmonary Medicine
David Baratz, MD - BGSMC
Richard Robbins, MD - VAMC
Gastroenterology
Paul Berggreen, MD - BGSMC
Francisco Ramirez, MD - VAMC
Geriatrics
Gary Salzman, MD - BGSMC
Endocrinology
Sylvia Vela, MD - VAMC
Medical Toxicology
Steve Curry, MD - BGSMC
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