Serving San Juan Capistrano, Laguna Hills, Mission Viejo, Irvine, & Beyond.
Internal Medicine

Mark Shields, MD

Dr. Shields provides comprehensive, evidence-based internal medicine care focused on the needs of older adults. He is committed to delivering timely, compassionate care while fostering strong, trust-based physician-patient relationships. He emphasizes clear communication and personalized treatment to support long-term health and quality of life.

Education & Credentials: