LOCAL HEALTHCARE PROVIDERS
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111 providers
Availability last updated 06/14/2025
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, Fullerton, and Orange, California, the latest surgical techniques, including minimally invasive surgeries, 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 breast cancer, skin cancers, and soft tissue sarcomas.
Outside of his private practice, Dr. Fischer continually strives to stay on top of the latest techniques in treating cancer, and he’s involved with innovative clinical trials at the Saint John's Cancer Institute (formerly John Wayne Cancer Institute) in Santa Monica. He also serves as an assistant program director of the Donald L. Morton, MD Complex General Surgical Oncology Fellowship program at the Institute.
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 now has expanded his practice to Orange County and sees patients at both Providence St. Joseph and St. Jude.
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Dr. Trevan Fischer, MD
Surgeon
11800 Wilshire Blvd
Los Angeles, CA 90025
Nojan Toomari, DO
Surgeon
501 S Buena Vista St
Burbank, CA 91505
Dr. Samuel Kashani, MD
Surgeon
16133 Ventura Blvd
Unit 415
Encino, CA 91436
Alvaro Bolivar, MD
Surgeon
590 N. Sierra Way
San Bernardino, CA 92410
Nojan Toomari, DO
Surgeon
16661 Ventura Blvd.
Suite 408
Encino, CA 91436
Francis Essien, MD, FACS, is a board-certified general surgeon and fellowship trained in minimally invasive and bariatric surgery.
Dr. Essien's zeal for the art and science of medicine and surgery began as a teenager at the University of Ibadan in Nigeria.
An interest in providing excellent patient care brought Dr. Essien to the United States to pursue a natural calling in the surgical specialty.
Passionate about cutting-edge, advanced, minimally invasive, and robotic surgical technology, Dr. Essien’s knowledge and expertise give patients the advantage of a faster recovery.
The surgeon’s more cosmetic approach also offers less pain and a quicker return to a happier and more productive lifestyle.
Dr. Essien is highly skilled in various procedures, most frequently performing laparoscopic surgery for severe gastroesophageal reflux disease, laparoscopic hernia repairs, hiatal hernia repairs, minimally invasive endocrine surgery, laparoscopic adrenalectomy, and laparoscopic colon resections for benign and malignant conditions.
Dr. Essien also performs laparoscopic sleeve gastrectomy, laparoscopic gastric bypass, and revision bariatric procedures.
With a passion for Bariatric surgery, Dr. Essien helps patients achieve their goals of a healthier weight while eliminating the medical illnesses associated with excessive weight and enjoying a better quality of life.
Dr. Essien believes in an individualized and holistic approach to improving the health and wellness of patients.
Outside of caring for patients, Dr. Essien enjoys spending time with family at home, cooking, traveling, cycling, and playing golf.
Dr. Francis Essien, MD
Surgeon
31537 Rancho Pueblo Road
Suite 202
Temecula, CA 92592
I am Dr. Kaylene Barrera, and it my absolute pleasure to be a surgeon in this community. I grew up in Southern California and got interested in Medicine when I was young. My mother had initially wanted to be a social worker, but then went back to school to become a nurse and would ask me to help her study by quizzing her with flashcards.
This led me to college at the University of California, Irvine and medical school at the University of Southern California, where I was fortunate to work with some amazing mentors that inspired me to go into surgery. My surgical training continued at the State University of New York, Downstate in Brooklyn where I trained at county and university hospitals. Again, I was blessed to have the most amazing mentors that taught me not only the technical aspects of surgery but the importance of dedication to our patients. I appreciated how as a surgeon, one could be involved in every aspect of a patient's care, contribute to scientific breakthroughs and be a patient advocate. Sharing what I have learned and experienced as a surgeon, I have published 9 peer reviewed publications, 33 national presentations, and four book chapters. I also have written about impact of meaningful issues such as drug shortage and the opioid epidemic, as these have a profound impact on my patients lives.
Thank you for choosing Murrieta Valley Surgery Associates, looking forward to the opportunity to help you in your wellness journey
Dr. Kaylene Barrera, MD
Surgeon
31537 Rancho Pueblo Road
Suite 202
Temecula, CA 92592
I am a triple-board certified surgeon with expertise in general, colorectal and trauma/ critical care surgery. Born and and raised in Brazil, I completed my medical education at the Federal University of Santa Catarina (UFSC).
In high school, my passion for Biology, Math and Physics led me to pursue medicine for its challenging and exciting nature. Working in the operating room, I take great satisfation in promptly addressing my patient's concerns through surgical interventions.
My frequent surgical procedures involve colorectal cancer removal, anorectal surgery (including hemorrhoids and fistulas), and hernia repair. With over two decades of surgical experience in Murrieta and Temecula, I am committed to providing patients with top-notch care and a positive treatment experience. As a Fellow of the American College of Surgeons (FACS) and the American Society of Colon and Rectal Surgeons (FASCRS), I continuously strive to integrate new technologies into my practice.
Beyond my medical pursuits, I enjoy traveling with my family, watching movies, reading, operating my drone, and capturing aerial photographs.
Dr. Tito Gorski, MD
Surgeon
31537 Rancho Pueblo Road
Suite 202
Temecula, CA 92592
Brian Tiu, MD, is a board-certified vascular surgeon at Murrieta Valley Surgery Associates.
Dr. Tiu always knew he wanted to be a doctor. Growing up, he volunteered at various hospitals and medical centers, which spurred his interest in medicine.
Dr. Tiu studied at Rutgers New Jersey Medical School in Newark, earning his medical degree. Then, he completed a surgical residency at the State University of New York (SUNY) Downstate Medical Center in Brooklyn and a vascular surgery fellowship at Maimonides Medical Center, also in Brooklyn.
These experiences inspired Dr. Tiu to pursue a career in vascular surgery. Dr. Tiu thinks vascular surgery is the most interesting field of medicine. As an expert in the field, he does everything from minimally invasive procedures, like angiograms, to open procedures, like removing blockages and performing bypasses.
Dr. Tiu loves making a difference in his patients' lives. He never rushes appointments and makes time to explain each vascular diagnosis in-depth. Specifically, he explains the natural course of diseases, including where they originate, why they occur, and what can be done to improve them.
Dr. Brian Tiu, MD
Surgeon
31537 Rancho Pueblo Road
Suite 202
Temecula, CA 92592
Nojan Toomari, DO
Surgeon
5353 Balboa Blvd.
Suite 300
Encino, CA 91316
Western Bariatric, AMC is a bariatric surgery provider serving patients in the San Bernardino, Riverside, and surrounding areas of Southern California. Available surgeries and treatments include Roux En Y Laparoscopic Gastric Bypass, Sleeve Gastrectomy, Lap Band, Medical Weight Loss, Body Contouring, and Hiatal Hernia Surgery. Douglas Krahn, MD, FACS is fellowship trained in general surgery and specializes in bariatric surgery. He is strongly dedicated to their patients and want to help each person live the healthy life that they deserve.
When patients arrive at Western Bariatric, AMC, the first goal is helping each person to determine their weight loss needs and goals. The doctors and staff at Western Bariatric, AMC can customize a weight loss plan for each person, whether it involves non-surgical options like the medical weight loss plan or surgical options like laparoscopic gastric bypass. Call to arrange a consultation anytime!
Dr. Douglas Krahn, MD
Surgeon
401 East Highland Avenue
Suite 351
San Bernardino, CA 92404
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