Kaplan MacLean Rheumatology in Encinitas provides subspecialty autoimmune and musculoskeletal care from Saxony Road under the direction of Natalie MacLean, MD, MSc, FRCPC. The practice houses one of the only dedicated extremity MRI scanners in San Diego County for in-office joint imaging, an on-site capability that accelerates diagnosis compared to external imaging referrals through orthopedic groups including Advanced Orthopaedics and Sports Medicine. Board certification through the Royal College of Physicians and Surgeons of Canada (FRCPC) in rheumatology, plus a prior clinical lectureship at the University of Alberta, establishes subspecialty credentials across more than 100 rheumatic disease classifications. An in-house IV drug infusion suite administers biologic therapies for conditions including rheumatoid arthritis, ankylosing spondylitis, and lupus, coordinating immunologic care with allergy and immunology specialists at Allergy & Asthma Medical Group when systemic immune overlap requires co-management. Highest-complexity protocols include anti-CCP antibody quantification, HLA-B27 genotyping for spondyloarthropathy differentiation, and musculoskeletal ultrasound-guided joint aspiration with corticosteroid injection.