Mason Clinic - Primary Care

Mason Clinic Primary Care provides family practice services, with providers who specialize in children, adults, geriatric population, women's health and more.

hours
  • Mon-Fri: 7:30 am to 5 pm

To book an appointment, call us at 1-360-426-2653

Thank you for choosing Mason Health

Arriving on time for your scheduled appointment is important in addressing your healthcare needs. Please notify Mason Health as soon as you know you will need to change or cancel your appointment. You are required to cancel your appointment at least one business day prior to your scheduled appointment because of high patient demands. Your ability to schedule future appointments will change because of missed appointments or cancellations. 

If you have questions about our No-Show and Cancellation policy, please call the clinic or download a copy of the No-Show and Cancellation Policy as indicated below.

Clinic Providers

Alyssa Abegg-Garcia, ARNP
Primary Care

Alyssa received her Masters of Nursing Degree from Seattle University, Seattle, Washington in August of 2017. She is also certified with the American Academy of Nurse Practitioners in Family Medicine.

Katie Aldrich, PMHNP-BC
Behavioral Health

Katie Aldrich, PMHNP-BC, earned her Masters of Science in Nursing, in the Psychiatric Mental Health Nurse Practitioner Program, from Gonzaga University in 2019. Aldrich enjoys caring for individuals across the lifespan and believes in working with her patients to assist individuals to attain their highest level of whole body health: mind, body, and spirit.

David E. Anderson, MD
Internal Medicine

Dr. Anderson joined Mason Health full-time in 2019. He is board-certified in internal medicine and has served 20 years in the U.S. military, including tours in Iraq, Korea and Africa. He takes great pride in serving this rural community.

Amber Carlson, LICSW
Behavioral Health

Amber Carlson joined the staff at Mason Health in January 2016. Prior to that she had worked as a clinical social worker at a local hospital in Kitsap County since 2010. Amber was born and raised in Snohomish County, Washington and has always considered the Pacific Northwest home.

Vanessa Cray, PMHNP-BC
Behavioral Health

Vanessa Cray, PMHNP-BC, earned her Masters of Science in Nursing, in the Psychiatric Mental Health Nurse Practitioner program, from Gonzaga University in 2019. Cray is drawn to the philosophy of patient-centered care, incorporating the patient’s personal ideals and cultural understanding into the focus of their own treatment.

Darren Cuevas, DO
Primary Care

Dr. Darren Cuevas joined Mason Health in September of 2018. He received his D.O. training at Midwestern University in Glendale Arizona and completed his Family Medicine Residency at St. Joseph’s Hospital, University of Minnesota in St. Paul. He enjoys practicing patient-focused holistic medicine. He is excited to be living and working in the Pacific Northwest.

Kirsten Garza, PMHNP-BC
Behavioral Health

Kirsten Garza, PMHNP-BC, earned her Masters of Science in Nursing, in the Psychiatric Mental Health Nurse Practitioner program, from Jacksonville University in 2019. She is accepting patients now. Utilizing therapy, nutritional changes and psychopharmacology she works with her patients to create a collaborative plan of care they are comfortable with to reach mutual goals.

KC Graham, PA-C
Primary Care

KC Graham, PA-C, is a certified physician assistant who obtained his Master’s degree in Physician Assistant Studies (M.P.A.S.) from Idaho State University in 2014.

Katie Hackney, PA-C
Primary Care

Katie received her Master of Medical Science degree from Barry University Physician Assistant Program in 2003. She enjoyed practicing medicine in Shelton before taking time off to start a family and is excited to return to patient care.

Michelle Hamilton, DO
Primary Care

Michelle Hamilton, D.O., joined the medical staff at Mason Health in 2019. She is passionate about working with families to combine the individual’s personal health philosophy with evidence-informed medicine.

Rebecca K. Hendryx, M.D.
Primary Care

Dr. Hendryx enjoys working with individuals and families to promote optimal health and well being throughout all stages of life.

Henry In, DO
Primary Care

Dr. In joined Mason Clinic in July 2020 and is accepting new patients. Dr. In obtained his medical degree at Touro College of Osteopathic Medicine in New York City. He is interested in a broad spectrum of medicine with a focus on continuity of care, servicing both inpatient and outpatient settings. His emphasis is on prevention and education as a goal to reach a healthy state of mind, body, and spirit.

Jenny Johnston, ARNP
Internal Medicine

Jenny Johnston joined Mason Health in 2019. She is a board-certified family nurse practitioner with more than 15 years of experience, including four years as a registered nurse and first lieutenant at Madigan Army Medical Center in Fort Lewis. Johnston believes that every patient is entitled to the best care she can possibly give and is passionate about the art of medicine.

Jennifer Kummerfeldt, ARNP
Primary Care

Jennifer has interests in family practice/primary care including acute care, chronic disease management, and mental health with emphasis on prevention and patient education.

Trevor Kwan, DO
Primary Care

Dr. Trevor Kwan joined Mason Clinic in July 2020. He completed his medical training at Michigan State University College of Osteopathic Medicine in East Lansing, Mich. in 2017. Dr. Kwan enjoys practicing multidisciplinary team medicine that is evidence-based and patient-centered. He also believes osteopathic manipulation is a valuable tool and adjunct to treatment plans.

Andrew Kwon, MD
Primary Care

Andrew Kwon, MD, officially joined the District in July 2018. Dr. Kwon received his medical degree from the University of Korea, College of Medicine in 1991, and completed his internship and residency in 1997 at Mid-Hudson Valley Family Practice Residency in New York, NY. He is board certified under the American Board of Family Practice.

Erin Martinache, LICSW
Behavioral Health

Erin K. Martinache joined Mason Health in November of 2015. Prior to that, she worked as a Mental Health Therapist, offering individual and group therapy to adults at a local community mental health clinic, since June of 2006.

Benjamin May, DO
Primary Care

Dr. Benjamin May joined Mason Clinic in July 2020 and is accepting new patients. He graduated from Pacific Northwest University College of Osteopathic Medicine in Yakima, Wash. in 2017. Dr. May trained specifically in a rural medicine residency because he wanted to be able to understand and best serve communities in rural areas. He is fluent in Spanish.

Allen L. Millard, MD
Primary Care

Dr. Millard has a special interest in diabetes and the care of children. He enjoys living in and being a part of the Shelton community and coaching youth soccer.

Amie Mower, DO
Primary Care

Amie E. Mower, D.O., joined the medical staff at Mason Health in 2019. She was appointed Medical Director of Integrated Behavioral Health in 2020. Dr. Mower is a board-certified family medicine physician and U.S. Army veteran. She has a special interest in pediatrics, women’s health and caring for individuals and family members associated with uniformed services.

Jennifer A Nelson, ARNP
Primary Care

Jennifer Nelson, A.R.N.P., is a board-certified family nurse practitioner licensed by the state of Washington, and also board-certified with the American Association of Nurse Practitioners (AANP).

Carlos Rubio-Reyes, MD
Primary Care

Dr. Rubio-Reyes is a board-certified family medicine physician who graduated from the Universidad Autónoma de Guadalajara Facultad de Medicina in Guadalajara, Mexico, and New York Medical College in 2013. He obtained his residency training at University of Missouri Health Care and has been in practice since 2017. He is fluent in Spanish and looks forward to reaching out to the Hispanic community.

Mark L. Schlauderaff, M.D.
Internal Medicine

Dr. Schlauderaff has a special interest in diabetes and teaches classes through the diabetes education program at Mason General Hospital. He has been honored as Washington State Rural Physician of the Year.

Resa L Shaner, PA-C
Primary Care

Resa Shaner completed her Physician Assistant Studies at Midwestern University, Downer’s Grove, IL. She is a board-certified Physician's Assistant in Family Medicine.

James Stauffer, PA-C
Primary Care

James Stauffer received his Master’s degree in Physician Assistant studies from Idaho State University, Pocatello, ID in August 2015. He is board certified with the National Commission on Certification of Physician Assistants (NCCPA).

Katrina Stringer, ARNP
Primary Care

Board-certified with special interests ranging from cough and cold symptoms to heart disease. Katrina believes in getting to know her patients and their families and wants all of them to feel comfortable and confident in her care.

Jimmy Wesson, M.D.
Internal Medicine

Jimmy Ray Wesson, Jr., M.D., joined the medical staff at MGH Olympic Physicians as an internist in August 2017. He received his medical degree from Cebu Doctors’ University, College of Medicine, in 2008 and completed his internship and residency in internal medicine at Columbia University/Harlem Hospital Center in 2017.

Frequently Asked Questions