
Cornerstone Medical Clinic
Cornerstone Medical Clinic is a primary care practice in Sumner, Washington, founded in 2010 and serving the Puyallup Valley and surrounding areas. Led by Dr. Waldo Dagan and nurse practitioner Ariana McDonald, the clinic offers internal medicine, women's health, chronic disease management, annual physicals, and minor surgery. The practice emphasizes accessible, coordinated care through partnerships with major health systems and uses electronic medical records for seamless care coordination.




