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Specialty Care
Anesthesiology

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Dr. Gold is a board-certified anesthesiologist. A native of Mandan, ND, Dr. Gold attended medical school at the University of Minnesota School of Medicine. He completed his residency in anesthesiology at Charity Hospital in New Orleans, LA. Dr. Gold joined Grand Itasca in 2005.
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Steven Lader, MD
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Dr. Lader is a board-certified
anesthesiologist. He grew up in Philadelphia, PA, and completed his
residency in anesthesiology in nearby Hershey, PA, at the Milton S.
Hershey Medical Center. Lader joined Grand Itasca in 2004.
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Chiropractic

Roy Kjorlien, DC |
Dr. Kjorlien is a
board-certified chiropractor and a fellow of the Academy of Chiropractic Orthopedists. A native of Perham, MN, Dr. Kjorlien attended Northwestern College of Chiropractic. Dr. Kjorlien joined Grand Itasca in 1997.
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Obstetrics/Gynecology

Patricia Westerberg, MD |
Dr. Westerberg is
board-certified in obstetrics and gynecology and is a fellow of the American College of OB/GYN. Raised in Deerwood, MN, Dr. Westerberg attended the University of Minnesota School of Medicine and completed her residency in OB/GYN at the University of Minnesota. Dr. Westerberg joined Grand Itasca in 2003. Dr. Westerberg enjoys walking and golf in her spare time.
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Ophthalmology

Chris Buntrock, MD
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Dr. Buntrock, a
board-certified ophthalmologist, is a partner at Consultative Eye
Care in Wayzata, MN. As part of his practice, he also provides
surgical eye care for patients in Moose Lake. Dr. Buntrock, a former
Grand Rapids native, previously worked for Bonner and Buntrock Eye
Clinic in Grand Rapids and Mesaba Clinic in Hibbing. Buntrock
attended the University of Notre Dame and University of Wisconsin.
He obtained his medical degree at Wisconsin in 1986 and completed
his residency in ophthalmology at the Medical College of Wisconsin
in 1990.
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Orthopedics

Elly Trepman, MD |
Dr. Elly Trepman is a
board-certified orthopedic surgeon with a sub-specialty in foot and ankle
surgery and care. Originally from Montreal, Dr. Trepman
received a bachelor’s degree in chemistry from McGill University and
graduated from Harvard Medical School and the Massachusetts
Institute of Technology in 1982. He completed an orthopedics
residency at Harvard and Beth Israel Hospital, a general surgery
residency at Brigham and Women’s Hospital and fellowships in sports
medicine and foot and ankle surgery at the New England Baptist
Hospital. He currently resides in Canada.
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Mark Rasmusson, PA |
Mark Rasmusson, a
certified physician's assistant, joined Grand Itasca’s orthopedic staff in July
2005. He had previously worked as a respiratory therapy technician
and emergency medical technician/paramedic prior to completing his
masters in physician assistant studies at the University of
Nebraska. He is an
avid fisherman and hunter and enjoys baseball, football, wrestling
and golf.
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Daniel Lister, MD |
Dr. Lister is a
board-certified orthopedic surgeon. He completed medical school at California College of Medicine, University of California – Irvine. Following his residency in orthopedic surgery at Letterman Army Medical Center in San Francisco, CA, Dr. Lister practiced in the Twin Cities and Northern Minnesota communities. Dr. Lister joined Grand Itasca in 2005. His areas of special clinical interest include sports medicine, shoulder and knee arthroscopy and spine surgery.
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Pathology

Roberta Zimmerman, MD |
Dr. Zimmerman is a
board-certified pathologist. Raised in St. Paul, MN, Dr. Zimmerman attended the University of Minnesota School of Medicine and completed her residency in anatomic and clinical pathology. Dr. Zimmerman joined Grand Itasca in
1986.
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Psychology

Kenneth Stapleton, LP |
Ken Stapleton is a licensed psychologist. A native of Littlefork, MN, Stapleton attended St. Mary’s College where he completed his master of psychology and counseling services degree.
Mr. Stapleton joined Grand Itasca in 1997.
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Podiatry

Thomas Perendy, DPN |
Tom Perendy, DPM, is a board
certified podiatrist. Dr. Perendy graduated from the University of
Minnesota, Mankato, and received his Doctor of Podiatry Medicine
from Wm. M. Scholl’s College of Podiatric Medicine. He is a
Diplomate of the American Board of Lower Extremity Surgery. His
special interests include all aspects of foot and ankle care, by he
particularly enjoys biomechanics, diabetic foot care and surgery.
Dr. Perendy joined Grand Itasca in 2008. |
Radiology

Dr.
Steve Haugen |
Dr. Haugen is a board-certified radiologist. Prior
to completing his fellowship at the University of Michigan in June
of 2006, he graduated from the Creighton University School of
Medicine and completed his residency in Diagnostic Radiology at the
University of Minnesota Medical School. He has also held numerous
teaching postions.
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Dr. William Johnson |
Dr. Johnson,
a board-certified radiologist, has worked with Arrowhead Consultation
Services for over 20 years. Dr. Johnson received his medical degree
from the University of Minnesota in 1978 and completed his residency
in diagnostic radiology at Fairview University Medical Center in
Minneapolis. [top of page]
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Mary Nett |
Dr. Nett, a board-certified radiologist, has worked
with Arrowhead Consultation Services for over 20 years. Dr. Nett
received her medical degree from Mayo Medical School and completed
her residency in diagnostic radiology at the University of
Minnesota.
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Surgery

Grant Custer, MD |
Dr. Custer is a
board-certified surgeon specializing in general and vascular surgery and is a
fellow of the American College of Surgeons. Raised in Reading, PA, he attended Johns Hopkins University and completed medical school at Georgetown University. Dr. Custer completed his surgical residency at Dartmouth / Hitchcock Medical Center. He enjoys fishing, hunting, golf, ultralight flying and woodworking in his spare time.
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John Kole, MD |
Dr. Kole, a board-certified surgeon and
fellow of the American College of Surgeons, joined Grand Itasca in 1994. A native of Chicago, IL, he attended Northwestern University and completed medical school at Case Western Reserve University. Dr. Kole completed his residency in general surgery at the Medical College of Wisconsin Affiliated Hospitals. He enjoys snowmobiling, golf and rooting for the Chicago Bears.
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David
Reitter, MD |
Dr. Reitter is a
board-certified surgeon. A native of Fridley, MN, Dr. Reitter attended the University of South Dakota School of Medicine. He completed his surgical residency at St. Francis Medical Center in Peoria, IL. Dr. Reitter joined Grand Itasca in 2002.
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Urology

Russell Lawson, MD
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Dr. Lawson, a board-certified
urologist, joined Grand Itasca in August of 2006. Lawson held
teaching and leadership positions at the University of Oregon
Medical School, was acting chief of urology at the U.S. Veteran’s
Hospital in Portland, OR, and a professor and chairman of the
department of urology at the Medical College of Wisconsin. He was
elected to “Best Doctors in America” by his peers and has received
numerous grants and awards for extensive research in a variety of
urological conditions.
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Anesthesiology
Timothy Gold, MD
Steven Lader, DO
Chiropractic
Roy Kjorlien, DC
Obstetrics/Gynecology
Patricia Westerberg, MD
Orthopedics
Daniel Lister, MD
Elly Trepman, MD
Mark Rasmusson, PA
Opthalmology
Chris Buntrock, MD
Pathology
Roberta Zimmerman, MD
Psychology
Kenneth Stapleton, LP
Podiatry
Thomas Perendy, DPM
Radiology
Steve Haugen, MD
William Johnson, MD
Mary Nett, MD
Surgery
Grant Custer, MD
John Kole, MD
David Reitter, MD
Urology
Russell Lawson, MD
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