Please call our Scheduling team at (509) 633-6229 for information regarding which providers are accepting new patients.
Andrew C. Castrodale, M.D.
Family Practice/Obstetrics (OB)
Dr. Castrodale arrived at Coulee Medical Center in 1998. He focuses on the complete scope of family medicine with fellowship training in obstetrics. He attended the University of Washington for his bachelor's degree and his medical degree. He completed his Family Medicine Residency and Obstetrics Fellowship at the Sacred Heart and Deaconess Hospitals in Spokane.
Nneka Asiamigbe, PA-C
Nneka has been a Physician Assistant for over 8 years and also has a background in nursing. She has primarily focused on Emergency Medicine and also has experience in Urgent Care and Family Practice. Nneka has joined Dr. Castrodale’s team and she holds a vital role in Dr. Castrodale’s practice. Nneka has availability to see Dr. Castrodale’s patients for non-Covid type urgent care appointments, wellness exams, as well as any follow up care needed. Nneka has been a part of the Coulee Medical Center team since 2021 and has enjoyed serving Coulee Medical Center and the surrounding community.
Jacob Chaffee, M.D.
Emergency Medicine/Obstetrics (OB)
Dr. Chaffee joined Coulee Medical Center with emphasis on obstetrics, emergency medicine, trauma, cardiovascular disease and diabetes. He was born in Seattle and raised in Arlington. Dr. Chaffee graduated from the University of Washington, served his internship in Spokane and his residency work in Colville, WA.
Eric Dudenhofer, ARNP, FNP-C
Eric joined Coulee Medical Center in 2012 and has experience in emergency medicine and dermatology. He received his Bachelor of Science in Nursing from Whitworth College, graduated from Washington State University in 1999 with a Masters in Nursing, and is a certified family nurse practitioner.
Cody Ellefsen, D.O.
Dr. Ellefsen came to Coulee Medical Center from Spokane, WA where he completed his Residency at Family Medicine Spokane in 2009. He received his B.S. in Sports Medicine and Athletic Training in 2002. He attended the Arizona College of Osteopathic Medicine at Midwestern University in Glendale, Arizona where he received his Doctorate of Osteopathic medicine in 2006. Dr. Ellefsen has been with Coulee Medical Center for many years and continues to work in our Emergency Department.
Anna Hardesty joined the Coulee Medical Center team in February of 2020. She attended Andrews University in Michigan for her undergrad and graduate degrees, graduating with her Doctorate of Physical Therapy in August of 2015. Her first job out of school was in Kent, WA at ATI Physical Therapy – working for almost three years as an outpatient physical therapist. She then became a travel physical therapist for almost 2 years before signing on with Coulee Medical Center. She currently works in both the outpatient clinic and inpatient/LTC settings here at Coulee Medical Center.
Sam Hsieh, M.D., FACS
Chief of Staff/General Surgery
Dr. Hsieh joined the Coulee Medical Center team in August of 2015. He was born in in Hong Kong, and he graduated from the Royal College of Surgeons in Dublin, Ireland. He completed his surgical residency at the University of Texas Medical Branch, Galveston, Texas in June of 2015. Dr. Hsieh’s main focus is on general surgery, some procedures include, but are not limited to, colonoscopy, gallbladder disease, soft tissue disease, gastrointestinal disease, hernias, thyroid, laparoscopic, vascular and varicose veins.
Samantha Brunner, PA-C
Surgical Assistant/Family Practice
Sam graduated from Washington State University in 2009 with a B.S. in Neuroscience and Kinesiology. She went on to obtain a Masters Physician Assistant Studies from Rocky Mountain College in Billings Montana with an emphasis in rural family practice . She joined the Coulee Medical Center family practice team in 2011 and spent 9 years in clinical family practice. As of 2021 she has transitioned over to the Surgical Care Team. She continues to enjoy the variety that rural medicine provides from urgent care to surgical procedures.
Elizabeth Hsu, MD
Dr. Hsu joined the Coulee Medical Center Team in November of 2015. Born in New Zealand, she graduated from the Royal College of Surgeons in Ireland, Dublin, Ireland and her main focus areas are Endocrinology, general diabetes and thyroid issues. Her Residency was completed at the University of Texas Medical Branch, Galveston, TX and her Fellowship for endocrinology was at the Houston Methodist Hospital, Houston, TX.
Wendy Hughes, ARNP
Family Practice/Behavioral Health
Raised in Wenatchee and residing in the Coulee area, Wendy received her Master's from Washington State University and she is a certified family nurse practitioner. In 2021, Wendy received her Post-Graduate Certificate in Psychiatric Mental Health from Frontier Nursing University. Wendy is board certified in family practice by the American Academy of Nurse Practitioners and is board certified in behavioral health by the American Nurses Credentialing Center. Wendy splits her time between Coulee Family Medicine and Coulee City Clinic.
Jennifer Knox, M.D.
Family Practice/Obstetrics (OB)
Dr. Knox has experience and education in family medicine, obstetrics, inpatient, and outpatient care and worked in the research field for four years before deciding to pursue her medical degree at the University of Washington. She’s a mother of two and excited to be joining CMC’s family medicine and obstetrics team.
Ablajan Heytak, PA-C
Ablajan was born in Northwestern China and grew up in a rural farming community in Qoqek China. Ablajan obtained his Master of Science in Biomedical Science in Physician Assistant Studies in 2020 and then worked in primary care clinics in New York City. Ablajan relocated to the state of Washington and started at Coulee Medical Center in 2022. Ablajan has joined Dr. Knox’s team as a Physician Assistant-Certified (PA-C). Ablajan will have a vital role in caring for Dr. Knox’s patients. Dr. Knox will continue to be the Primary Care Provider (PCP) while Ablajan will have availability to see Dr. Knox’s patients for any non-COVID related, urgent care needs. He is happily married to his wife Shawna and is the proud father of 8-year-old and 5-year-old daughters.
Rick King, P.T.
Rick was raised in Index, WA in the Cascade Mountains on the west side of Stevens Pass. He graduated from Eastern Washington University Physical Therapy program in 1988. After practicing in Spokane for 3 years, he moved to Grand Coulee in 1991 and opened Grand Coulee Physical Therapy. After 23 years, Rick became a full time CMC employee in 2014. He has once again become a student and is earning a Doctorate of Physical Therapy degree.
Brian Lee, CRNA
Brian joined Coulee Medical Center in 2019 from Spokane, WA where he has been providing anesthesia services since 2015. He received his Bachelor of Science degree from Kettering College of Medical Arts in Ohio and graduated with a Master of Anesthesia Education from Gonzaga University in 2015. He completed his anesthesia residency at Sacred Heart and Holy Family Medical Centers in Spokane, WA. His anesthesia practice includes general surgery, emergency/trauma, ENT, urology, neurosurgery, vascular, orthopedic, high-risk obstetrics, and pediatrics.
Alvina Marris, Psychologist
Licensed Behavioral Health Care Manager
More info coming soon!
Chris C. McGlothlen, PA-C
Chris McGlothlen, PA-C was born and raised in Yakima, Washington. He joined the Coulee Medical Center team in October of 2017. Chris graduated from the University of Washington in Seattle, Washington with a B.S. in Atmospheric Sciences in 1990. He then served as an Officer in the U.S. Navy. Chris went on to obtain his B. S. in Physician Assistant Studies from Oregon Health & Sciences University in Portland, Oregon in 1997. Chris specializes in Emergency Medicine.
Roy Myers, M.D.
Dr. Myers was born in Richland, Washington and grew up in Eastern Washington. Dr. Myers joined the Coulee Medical Center team in December of 2016, he came to us from Indian Health Services in Nespelem, WA. He attended the University of Colorado School of Medicine and obtained his M.D. in 1994. He completed his Family Practice Residency at the Trover Clinic in Madisonville, KY.
Charles Randolph, M.D.
Family Medicine/Obstetrics (OB)
More info about Dr. Randolph is coming soon!
Karen Rimpler, ARNP
ED Coordinator/Emergency Medicine
Karen came to Coulee Medical Center from Northeast Washington Medical Group in Colville. She received her bachelor's of science in nursing from Minot State University in Minot, North Dakota, in 2000 and her Master of Science, Family Nurse Practitioner from the University of Minnesota in 2002.
Michael Rimpler, CRNA
Mike joined Coulee Medical Center in 1999. He received his M.S. in Biology from Southern Connecticut State University and his board certification in anesthesia from Bridgeport Hospital Nurse Anesthesia program. His anesthesia practice has included open heart surgery, trauma, high-risk obstetrics, pediatrics, and regional, vascular, thoracic, neuro and ambulatory surgery.
Alex Troncoso has been working in the clinical nutrition field since 2017 and has been a registered dietician since 2020. Alex gained valuable experiences working in a variety of settings from skilled nursing facilities to hospitals. Most recently, Alex worked at Sacred Heart Medical Center on a wide range of floors from Oncology to Renal. Alex joined the Coulee Medical Center team in 2022 and provides nutritional education for patients with a variety of medical conditions including weight management, diabetes, chronic kidney disease, and liver disease.
Cassandra Viramontes, MSN, ARNP, FNP-C, CEN, SANE
Cassandra previously worked as a Registered Nurse for 14 years, 12 of those as a critical care nurse working in Emergency and Intensive Care. Educating, managing, and working closely with staff and patients during that time, she realized the increasing need for compassionate, comprehensive primary care. Cassandra joined Coulee Medical Center in 2021 with the goal of making outstanding medical care more available to our community.