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Olivia Mac, MD, is double board certified in general surgery and surgical critical care. 

Dr. Mac grew up in the suburbs of Los Angeles County and attended medical school at the Medical College of Wisconsin in Milwaukee. After medical school, she returned to California to complete her general surgery residency at Arrowhead Regional Medical Center/Kaiser Permanente Fontana and then a surgical critical care fellowship at Arrowhead Regional Medical Center. 

Dr. Mac became a surgeon so that she could use her skills to help others, as surgeons in the past have helped those in her family. 

In her free time outside of the office, Dr. Mac enjoys baking, playing the piano, and playing with her cats.

She looks forward to welcoming both new and returning patients to Murrieta Valley Surgery Associates.

Amit Karmur, DO, is the newest vascular surgeon to join Murrieta Valley Surgery Associates (MVSA).

Dr. Karmur graduated from medical school at the Western University of Health Sciences and completed his general surgery residency at Community Memorial Health System in Ventura, California. He then went on to sub-specialize and complete his fellowship in vascular surgery at Harbor-UCLA Medical Center.

Dr. Karmur treats all types of diseases that affect the vascular system. He specializes in both traditional open surgical and minimally invasive endovascular techniques. These include diseases of the carotid arteries, aortic aneurysms, peripheral arterial disease, and dialysis access.

During his spare time, Dr. Karmur likes to travel and learn about new cultures. He also enjoys maintaining his health by working out and staying active by exploring the outdoors. He and his wife are both from the Inland Empire and are excited to be back in the community.

Xiujie Wang, MD, FACS, RPVI, is a board-certified vascular surgeon at Murrieta Valley Surgery Associates.

Dr. Wang studied at Shanxi Medical University in Jinzhong, China, earning her medical degree. After graduation, she moved to the United States and completed a surgical residency at St. Mary’s Hospital in Waterbury, Connecticut. She also completed a vascular surgery fellowship at the Icahn School of Medicine at Mount Sinai in New York City.

Dr. Wang brings more than 20 years of vascular surgery experience to the practice. She treats a wide array of conditions but has a special interest in treating peripheral artery disease (PAD), varicose veins, and aneurysms. 

Outside of the office, Dr. Wang holds appointments at several area hospitals, including Inland Valley Regional Medical Center; Rancho Springs Medical Center and Loma Linda University Medical Center; and Temecula Valley Hospital.

Dr. Wang is board-certified in general and vascular surgery by the American Board of Surgery. She’s also a fellow of the American College of Surgeons and a member of the Society of Vascular Surgery and the American Venous Forum.

Dr. Wang welcomes anyone in need of vascular surgery to Murrieta Valley Surgery Associates today. 

Hege Johnsen, MD, FACS, is a board-certified general surgeon at Murrieta Valley Surgery Associates, providing complete surgical care to patients in Wildomar, Temecula, Hemet, and Menifee, California.

Dr. Johnsen studied at Albert Szent-Gyorgi Medical University in Szeged, Hungary, earning her medical degree. She then moved to the United States and completed a residency in general surgery.

Dr. Johnsen brings more than 20 years of experience to the practice. She specializes in general surgery but has a special interest in breast surgery and inguinal hernia repair without mesh (shouldice procedure).

Outside of Murrieta Valley Surgery Associates, Dr. Johnsen holds appointments at several area hospitals, including Inland Valley Regional Medical Center in Wildomar, California; Rancho Springs Medical Center in Murrieta, California; Menifee Valley Hospital in Menifee, California; and Temecula Valley Hospital in Temecula, California; and Loma Linda University Medical Center. 

Dr. Johnsen is board-certified by the American Board of Surgery and is a Fellow of the American College of Surgeons. She speaks English and Norwegian fluently, allowing her to serve the practice’s diverse clientele. 

Dr. Johnsen welcomes anyone needing general, breast surgery, hernia repair or cholecystectomy to Murrieta Valley Surgery Associates today.