LOCAL HEALTHCARE PROVIDERS
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87 providers
Availability last updated 04/30/2026
Sami Hamamji, MD
Surgeon
1100 W Stewart Drive
Orange, CA 92868
Pramod Batra, md
Surgeon
1100 W Stewart Drive
Orange, CA 92868
Grace Hwang, MD
Surgeon
1100 W Stewart Drive
Orange, CA 92868
Eric Pham, MD
Surgeon
1100 W Stewart Drive
Orange, CA 92868
Quang Vo, MD
Surgeon
2501 E Chapman Ave Ste 200
Fullerton, CA 92832
Jim Seraj, MD
Surgeon
23422 Peralta Dr Ste C
Laguna Hills, CA 92653
About Dr. Fischer
Trevan Fischer, MD, FACS, specializes in complex general surgical oncology and is certified by the American Board of Surgery. Dr. Fischer is an experienced surgeon who offers patients in Santa Monica, Los Angeles and Orange, California, the latest surgical techniques to help in the battle against cancer. His thorough understanding of the nature of cancer allows him to perform complex surgeries that help him diagnose and treat a number of conditions, including melanoma, other skin cancers, and soft tissue sarcomas.
Outside of his practice, Dr. Fischer continually strives to stay on top of the latest techniques in treating cancer, and he is actively involved with innovative clinical trials at The Angeles Clinic and Research Institute, a Cedars-Sinai affiliate. He also involved in continuing training the next generation of surgical oncologist as faculty member of Cedars Complex General Surgical Oncology Fellowship program. Cedars-Sinai is consistently ranked among the nation’s top hospitals, recognized for pioneering research, advanced technology, and world-class patient care—providing an unparalleled environment for cancer innovation and collaboration.
Dr. Fischer began his medical career at the University of Oklahoma in Oklahoma City, where he earned his medical degree in 2008. He completed his general surgery residency at the University of Florida in Gainesville in 2015, serving as chief resident from 2014-2015. In 2015, Dr. Fischer became a fellow at the John Wayne Cancer Institute, where he completed two years of specialized surgical oncology training.
To continue his education, Dr. Fischer is a member of the Society of Surgical Oncology, the American College of Surgeons, and the American Medical Association.
Over the course of his career, Dr. Fischer’s involvement in research and clinical trials has led to numerous articles, papers, and presentations in peer-reviewed publications and at national conferences.
Dr. Fischer is constantly exploring new ways to gain the upper hand on cancer through state-of-the-art surgical techniques and brings this experience to the Southern California area. He also accepts patients across all of Southern California, including Bakersfield, San Luis Obispo and Palm Springs.
Dr. Fischer has continued his practice in Orange County and sees patients at Providence St. Joseph.
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Dr. Trevan Fischer, MD
Surgeon
2151 N Harbor Blvd
Ste. 3200
Fullerton, CA 92835
Alvaro Bolivar, MD
Surgeon
590 N. Sierra Way
San Bernardino, CA 92410
Melinda Lamb, MD
Surgeon
275 Victoria St Ste 2l
Costa Mesa, CA 92627
Thang Nguyen, MD
Surgeon
400 Newport Center Dr
Ste 102
Newport Beach, CA 92660
Yanira Perez, MD
Surgeon
15115 Amar Rd
La Puente, CA 91744
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.
Dr. Hege Johnsen
Surgeon
36320 Inland Valley Dr.
#101, #208, #301
Wildomar, CA 92595
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.
Dr. Olivia Mac
Surgeon
36320 Inland Valley Dr.
#101, #208, #301
Wildomar, CA 92595
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.
Dr. Amit Karmur
Surgeon
36320 Inland Valley Dr.
#101, #208, #301
Wildomar, CA 92595
Craig Owens, MD, is a board-certified general surgeon at Murrieta Valley Surgery Associates.
Dr. Owens studied at the Tufts University School of Medicine in Boston, Massachusetts, earning his medical degree. Then, he completed a transitional year internship at St. Elizabeth’s Medical Center in Brighton, Massachusetts.
Before entering private practice, Dr. Owens completed a general surgery residency at the Loma Linda University Health Education Consortium in Loma Linda, California, receiving extensive training in all aspects of surgical care.
Dr. Owens is knowledgeable in various surgical techniques and specializes in minimally invasive laparoscopic surgery.
He holds privileges at several area hospitals, including Inland Valley Regional Medical Center; Rancho Springs Medical Center and Loma Linda University Medical Center Murrieta; Temecula Valley Hospital in Temecula, California; and Menifee Valley Hospital.
When he isn’t meeting with patients or performing operations, Dr. Owens enjoys golfing and car racing. He also believes in continuing education and stays abreast of advances in surgical techniques and technologies.
Dr. Owens is board-certified by the American Board of Surgery. He welcomes anyone needing general surgery to Murrieta Valley Surgery Associates today.
Dr. Craig Owens
Surgeon
36320 Inland Valley Dr.
#101, #208, #301
Wildomar, CA 92595
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