Provider Directory
Dr. Aimee Rogers
Dr. Arian Kargar
Dr. Robert Quackenbush
Medical Oncology
Dr. JD Ward
Ashley Christensen, FNP
Dr. Russ Nichols
Dr. Emily Jack
Dr. Gwen Libby
Dr. Stephen Chung
Elizabeth Michael, BSN RN IBCLC
Teri Rosselle, FNP
Dr. Tim Herndon
Our providers take a community approach to keeping you healthy–with the personalized, friendly care you'd expect, plus access to a whole network of resources and expertise. Our primary, and specialist providers, see patients in Pendleton and the surrounding area. You'll find most of the services you need right here. Our goal is to exceed your expectations.
Dermatology
Marla Kae Stahlnecker, NP
Accepting new patients
- Specialties: Dermatology
- Phone/appointments: 541-966-0535, option 3
Marla Kae Stahlnecker is a Family Nurse Practitioner with a passion for Medical Dermatology. She graduated from Loma Linda University with a BSN in Nursing and from Washington State University with an MSN as a Family Nurse Practitioner. For over 20 years she has worked with people to help them improve the health of their skin.
Marla Kae believes being a health care provider allows her to be in a role that is continually evolving, learning and growing. She considers it a privilege to build collaborative, often long-term relationships with individuals and sometimes families, offering her skills and knowledge to support them in navigating their path toward managing their health and well-being.
As a nurse practitioner in dermatology, she believes in care built on compassion, education and collaboration. Every patient deserves to feel heard, respected, and supported, and she values building lasting relationships. Using experience and evidence-based practice, she cares for people of all ages to prevent, detect, and manage skin and skin cancer concerns. Her goal is to create plans that fit each individual's needs and help them feel confident in their skin health.
When she is not working, Marla Kae enjoys spending time with her family, baking, listening to music, walking, traveling, painting and reading.
Family Medicine
Russel Nichols, MD
Accepting new patients
- Specialties: Family Medicine
- Phone/appointments: 541-966-0535, option 4
Dr. Nichols graduated from Oregon Health and Science University and began practicing medicine in 2001. He specializes in family medicine.
Dr. Nichols enjoys getting to know patients and their families, learning about their lives as a whole, and not just their medical conditions.
When not practicing medicine, Dr. Nichols enjoys running, hiking, and coaching high school sports.
Gwen Libby, MD
Accepting new patients
- Specialties: Family Medicine
- Phone/appointments: 541-966-0535, option 4
Dr. Libby graduated from the University of South Carolina School of Medicine and completed a family medicine residency at the University of Alabama-Huntsville. She specializes in family medicine.
Dr. Libby loves helping families and generations learn about living healthy, preventing disease, and helping them through illnesses. She wants to help them reach their health goals and live a long, happy life.
When not practicing medicine, Dr. Libby is busy raising her two young children, gardening, hiking, and camping.
Internal Medicine
Arian Kargar, DO, FACP
Accepting new patients
- Specialties: Internal Medicine
- Phone/appointments: 541-966-0535, option 3
Dr. Kargar graduated from the Rowan University School of Osteopathic Medicine, and started practicing medicine in 1993. She specializes in internal medicine.
One of Dr. Kargar’s most rewarding aspects of practicing medicine is the opportunity to create a welcoming and safe environment for patients so they feel heard and understood. This atmosphere fosters open communication, allowing for a thorough assessment of medical needs. Collaboratively developing treatment plans with patients, through shared decision making, ensures care is personalized and effective, ultimately leading to better health outcomes and patient satisfaction.
When not practicing medicine, Dr. Kargar enjoys cooking, gardening, and exercise.
Midwifery/Lactation Consultant
Elizabeth Michael, BSN, RN, IBCLC
Accepting new patients
- Specialties: Lactation Consultant
- Phone/appointments: 541-966-0535, option 2
Elizabeth specializes in lactation consulting.
Medical Oncology
Robert Quackenbush, MD
Accepting new patients
- Specialties: Medical Oncology
- Phone/appointments: 541-966-0580
Dr. Quackenbush specializes in medical oncology, providing vital cancer care services, including:
- Chemotherapy
- Diagnostic services
- Follow-up care
- Treatment consultations
Neurology/Sleep Medicine
Stephen Chung, MD
Accepting new patients
- Specialties: Neurology/Sleep Medicine
- Phone/appointments: 541-966-0535, option 3
Dr. Chung graduated from Loma Linda University School Of Medicine. He specializes in neurology and sleep medicine.
Lynn Lieuallen, NP
Accepting new patients
- Specialties: Sleep Medicine
- Phone/appointments: 541-966-0535, option 3
Lynn is a family nurse practitioner specializing in sleep medicine.
Pediatrics
Timothy Herndon, MD
Accepting new patients
- Specialties: Pediatrics
- Phone/appointments: 541-966-0535
Dr. Herndon graduated from the University of New Mexico School of Medicine, and started practicing medicine in 1985. He specializes in pediatrics/children’s care.
Dr. Herndon enjoys interacting with people, patients and their families in particular, listening to them, getting to know them and helping them in any way he can. He has worked in a variety of places, seen many different health situations, and has worked with many good problem solvers.
When not practicing medicine, Dr. Herndon enjoys walking, bicycling, swimming, and hanging out with his family.
Teri Rosselle, NP
Accepting new patients
- Specialties: Pediatrics
- Phone/appointments: 541-966-0535
Teri graduated from Oregon Health Sciences University with her nursing degree and Gonzaga University with a Master of Science in Nursing. She started practicing medicine in 2003 and specializes in pediatrics.
Teri was born and raised in Pendleton, and it has always been deeply important to her to give back to the community that shaped her. Being able to live, work, and raise her own family here brings a strong sense of purpose and connection to her work. Joining St. Anthony Family Clinic was a natural choice because it allowed her to provide high-quality, compassionate care in the very place she calls home.
Teri values building long-term relationships with patients, being a trusted resource for families, and making a lasting impact on people’s health and quality of life.
She cherishes spending quality time with her husband and their children. As avid college football fans, they enjoy the excitement of the season and the camaraderie it brings. Her family also enjoys traveling, always seeking new experiences together. A significant part of their lives revolves around their show goat operation, where they breed and raise high-quality goats for youth in the livestock industry.
Urology
Aimee Rogers, MD
Accepting new patients
- Specialties: Urology
- Phone/appointments: 541-966-0535, option 3
Dr. Rogers graduated from the University of Louisville School of Medicine. She started practicing medicine in 2012 and specializes in urology.
Dr. Rogers believes in establishing a close connection to each of her patients because it greatly promotes the healing process.
When not practicing medicine, Dr. Rogers enjoys spending time with her family, both human and canine, and watching Netflix.
Women's Health
Compassionate care for every woman
The St. Anthony Hospital Women's Clinic in Pendleton offers compassionate and high-quality care to women, recognizing the personal nature of reproductive health. Our team of OB/GYNs and certified nurse midwives (CNMs) provides comprehensive services throughout every stage of life, fostering a supportive and inclusive environment where patients feel heard and empowered. Our approach emphasizes attentive listening, empathetic support, holistic wellness, and personalized care plans developed in collaboration with patients and their families, all while utilizing the latest medical advancements.
We provide a wide array of services including prenatal care, labor and delivery support, postpartum care, and lactation assistance. Beyond maternity care, we offer comprehensive gynecologic services such as routine checkups, cancer screenings, STI management, gynecologic surgery, and management for irregular periods and menopause. Both OB/GYNs and CNMs work together to ensure seamless and coordinated care, with CNMs providing a holistic approach to wellness and collaborating closely with physicians.
For more information or to schedule an appointment with our women's health providers, call 541-966-0535, option 2.