Mason Health is pleased to announce the opening of its newest facility, Mason Health-Evergreen Clinic, located at 1812 N. 13th Loop Rd., Shelton, WA 98584. The primary care clinic will welcome its first patients on Monday, Feb. 2, with initial operating hours from 7 a.m. to 4 p.m., Monday through Thursday. 

Meet the Providers:

• Carlos Rubio‑Reyes, MD, is a well-respected board-certified family medicine physician who initially joined Mason Health in January 2020 and will begin seeing patients in early February 2026 at the Evergreen Clinic. He earned his medical degrees from Universidad Autónoma de Guadalajara and New York Medical College (both in 2013), completed his residency at University of Missouri Health Care in 2017, and previously trained as a pharmacist in Toronto. Fluent in Spanish, he is committed to serving underserved communities and offers comprehensive family medicine.
• Mathew (Mat) Kummerfeldt, PA‑C, is a seasoned Physician Assistant who will join Evergreen Clinic immediately on opening day. Kummerfeldt came to Mason Health in 2023, bringing nearly two decades of medical experience in inpatient, urgent, and emergency care to the District. His medical training began as a U.S. Navy Hospital Corpsman, serving mostly with the Marine Corps, while also training as an Emergency Medical Technician. After active duty, Kummerfeldt trained as a Physician Assistant at the University of Washington’s MEDEX Northwest program. He is a board-certified physician assistant and is skilled in the delivery of primary care, addressing a wide range of health issues with patient-centered care. 

Evergreen Clinic is designed to expand access to primary care in Mason County. With its morning-to-afternoon hours and bilingual care capabilities, the clinic aims to reduce barriers, offer timely appointments, and provide culturally responsive health services.

“Expanding access to care is at the heart of Mason Health’s mission,” said Mason Health COO Winfried Danke, FACHE. “By opening the Evergreen Clinic, we’re making it easier for patients to receive timely, high-quality primary care close to home. This investment reflects our commitment to improving health outcomes and meeting the growing needs of our community.”

Clinic Hours & Location:

Address: 1812 N. 13th Loop Rd., Shelton, WA 98584

Open: Monday–Thursday, 7 a.m. – 4 p.m. (Patients can register as early as 6:45 a.m. for appointments.)

To schedule an appointment at Evergreen Clinic, please call 360‑426‑2653. Mason Health accepts most insurance plans and is committed to providing high-quality, equitable care to all residents.

Mason Health, Public Hospital District No. 1 of Mason County is ISO 9001 Quality Management System certified by Det Norske Veritas (DNV) and is a licensed and accredited acute care hospital with a level four emergency trauma designation. The Board of Hospital District Commissioners are Don Welander, President, Pamela Schlauderaff, Trustee, and Lori Brady, Trustee. Mason General Hospital and Mason Clinic are ENERGY STAR® certified and Mason Health is the recipient of one Practice Greenhealth Environmental Excellence Award, three Partner for Change Awards, two Greening the Operating Room Awards, the Making Medicine Mercury Free Award and the 2025 Emerald Award. To learn more about Mason Health’s sustainability efforts, visit https://www.masonhealth.com/about/sustainability-environmental-stewardship. There are more than 100 physicians on staff in 19 specialties. For more information or to find a health care provider, visit www.masonhealth.com. To learn more about DNV, visit www.dnv.com/healthcare.

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