R. G. �Trip� Johnstone III III, MD

R. G. “Trip” Johnstone III, MD is an allergist in Greenville, SC. Providing specialized care for those seeking relief from allergies and asthma, the practice offers a variety of clinical services including allergy testing, allergy shots (subcutaneous immunotherapy), and biologics such as Xolair, Fasenra, and Nucala. The practice also manages food allergies through oral immunotherapy and risk reduction strategies.

Dr. Johnstone has practiced in the Upstate area for 20 years and has lived in the region for over 35 years. His clinical approach focuses on creating a partnership with his patients to identify the specific causes of allergic disease and developing customized, practical treatment plans. His medical background includes training at the University of SC School of Medicine, an internship at Spartanburg Regional Medical Center, a residency at Greenville Memorial Hospital, and a fellowship at Wake Forest University. He is board-certified by the American Board of Allergy & Immunology.

The practice is located on Creekview Ct, situated near Rocky Creek and a short distance from St. Francis Eastside hospital.

Dr. Johnstone is recognized for his deep expertise in the diagnosis and management of complex allergic conditions and his commitment to personalized patient care. His long-standing history in the local community reflects a dedicated approach to helping patients take control of their health.

Dr. Johnstone provides specialized allergy and asthma solutions to the residents of Greenville, SC.