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Dr. David Magner is a double board-certified surgeon specializing in colorectal surgery. He serves as the Clinical Chief of the Division of Colorectal Surgery at Cedars-Sinai Medical Center in Beverly Hills, CA. Dr. Magner delivers expert laparoscopic and minimally-invasive colon and rectal surgical procedures and prioritizes interdisciplinary, patient-centered treatment for colorectal disease.

To make his patients as comfortable as possible, Dr. Magner emphasizes his skill in laparoscopy, a low-risk and minimally-invasive approach that requires only small incisions. He offers completely laparoscopic colon and rectal procedures even for surgeries typically performed in an “open” manner.

After his post-baccalaureate, pre-med training at Harvard University, Dr. Magner earned his medical degree from the University of California, Irvine, School of Medicine. He was appointed Academic Chief Resident during his general surgery residency at Cedars-Sinai Medical Center and continued his training as a fellow in Colon and Rectal Surgery at University of Miami/Jackson Memorial Hospital.

Before opening a private practice in Beverly Hills, Dr. Magner lent his patient-focused skills to the team of California Colorectal Surgeons. He’s proficient in treating all aspects of colorectal disease, including benign anorectal conditions, inflammatory bowel disease, pelvic floor dysfunction and advanced gastrointestinal malignancies.

As a faculty member in the Division of Colon and Rectal Surgery at Cedars-Sinai Medical Center, Dr. Magner’s research interests focus on improving clinical outcomes for surgical patients. His work has been published in multiple peer-reviewed journals and presented at several professional conferences, both nationally and internationally.

Karen Zaghiyan, MD, FACS, FASCRS, is a renowned expert and leader in in the field of colorectal surgery. As a board-certified colorectal surgeon Dr. Karen Zaghiyan sees patients in her practice in Los Angeles, California and does all major surgeries at Cedars Sinai Medical Center in Beverly HIlls, CA. Dr. Zaghiyan’s interests lie in providing minimally invasive treatments for conditions of the colon, rectum, and anus through the use of robotic, laparoscopic, transanal and natural orifice techniques.

Her special interests in colorectal cancer and inflammatory bowel disease (IBD) have driven her success as one of the early adopters and innovators of transanal total mesorectal excision (taTME) and transanal ileal pouch-anal anastomosis (taIPAA) for patients with rectal cancer and inflammatory bowel disease.

Dr. Zaghiyan is the Director of the Colorectal Cancer Tumor Board at the Samuel Oschin Comprehensive Cancer Institute at Cedars Sinai Medical Center in Los Angeles. She is also the Associate Professor of Surgery and Program Director for the Colorectal Residency Program at Cedars Sinai Medical Center. 

Dr. Zaghiyan graduated magna cum laude with a Bachelor of Science in Biology from the University of California, Los Angeles. She then completed medical school at the University of California, San Diego before pursuing her general surgery residency and colon and rectal surgery fellowship at Cedars-Sinai Medical Center in Los Angeles. During this time, she traveled to Singapore for additional training from international leaders in her field prior to return to Los Angeles to start her practice. 

Dr. Zaghiyan is an innovator and expert in her field who is regularly invited to speak and teach at top national and international conferences. She is the principal investigator of numerous local, national and international research projects with the goal to improve the care of patients with colorectal conditions. Her research focuses on practical issues in colorectal surgery such as the use of local nerve blocks to minimize surgical pain and improve recovery, early diet advancement, optimal steroid dose after IBD surgery, and quality of life after J-pouch surgery, to name a few. 

Dr. Zaghiyan remains dedicated to making advancements in her field, which directly impacts the well-being of her patients. With her clinical and research expertise along with her commitment to providing the highest-quality care, Dr. Zaghiyan delivers the most cutting-edge treatments for men and women with colon and rectal diseases.

Board-certified general and bariatric surgeon Amir Mehran, MD, FACS, FASMBS, provides exemplary bariatric and general surgery at University Bariatrics in Thousand Oaks, California. 

A Duke University Medical School graduate, Dr. Mehran completed his surgery residency in New Jersey, followed by a Minimally Invasive Surgery (MIS) and Bariatric fellowship at the Cleveland Clinic in Florida. He served as the UCLA Bariatric Surgery Program Chief for several years, prior to establishing his own surgical program in the Thousand Oaks area.  

The name University Bariatrics reflects his goal of combining the integrity and values of his past academic career, with a new private practice that is focused on serving the community around him. Dr. Mehran has contributed to over 160 publications and presentations and has mentored numerous fellows, residents, and medical students. 

He is a member of multiple surgical societies and has served as a consultant for various regulatory agencies, surgical journals, the media, and the medical industry. In recognition of his dedication and efforts, his peers have repeatedly elected him to the Southern California Super Doctors list. He currently serves as the elected Chair of Surgery at Los Robles Medical Center.

Karen Quirk, MD, FACS, is a highly-skilled vascular and endovascular surgeon on the team of providers at Coastal Vascular Center in Oxnard, Camarillo, and Simi Valley, California. She’s one of the few female surgeons in the field of vascular surgery, which only has a 10% female population nationwide.

Dr. Quirk was born and raised in South Korea and immigrated to America as a young teen. She graduated on the dean’s honor list with a Bachelor of Arts in Molecular Cell Biology from the University of California in Berkeley. After graduating, she spent some time conducting basic scientific research on a therapeutic recombinant proteinase before going to medical school. Dr. Quirk earned her medical degree from the University of California Irvine School of Medicine, graduating with a variety of honors and research awards. 

She went on to discover her love and passion for surgery and completed an internship and residency in general surgery at Harbor–University of California Los Angeles Medical Center. She found herself particularly drawn to vascular surgery because of the field’s technical elegance, its capacity for lifelong relationships with patients, and its challenges in managing complex vascular diseases. This passion bloomed during her vascular surgery fellowship at the University of California San Diego Medical Center and continues to drive her in practice today.

Dr. Quirk has a reputation for outstanding surgical skills and compassionate patient care. She’s a fellow of the American College of Surgeons and the Society for Vascular Surgery and is one of the few surgeons in Southern California capable of using fenestrated stent-graft technology to perform minimally invasive complex aortic aneurysm repairs. She manages the full spectrum of vascular disease at Coastal Vascular Center.

Outside of work, Dr. Quirk enjoys spending time with her two wonderful boys.

Kevin M. Major, MD, FACS, is a board-certified Vascular and Endovascular Surgeon with over 20 years of experience. He currently serves the community of Ventura County on the team of providers at Coastal Vascular Center, which has three state-of-the-art clinics in Oxnard, Camarillo, and Simi Valley, California. 

Dr. Major graduated from the University of San Diego in 1992 with a degree in Biochemistry and a minor in Business Administration. He went on to earn his medical degree in 1998 from the Medical College of Ohio (now known as the University of Toledo College of Medicine and Life Sciences) in Toledo.

Dr. Major returned to Southern California for his post-graduate training, completing a residency in General Surgery at Cedars-Sinai Medical Center in Los Angeles, where he also completed additional fellowship training in Surgical Critical Care. He went on to complete fellowship in Vascular Surgery at the University of Southern California (USC) in Los Angeles.

Dr. Major holds certification from the American Board of Surgery in General Surgery, Surgical Critical Care, and Vascular Surgery. He is also a fellow of the American College of Surgeons. 

Dr. Major has recently served as the chairman of the surgery department at Community Memorial Hospital in Ventura, California. He retains privileges at Community Memorial Hospital, St. John’s Regional Medical Center in Oxnard, Pleasant Valley Hospital in Camarillo, and Adventist Health Simi Valley.

Dr. Major looks forward to getting to know his patients at Coastal Vascular Center and keeping them in excellent health.

Gregory Albaugh, DO, FACS, is a board-certified vascular and endovascular surgeon who’s been providing Ventura County with exceptional medical care since 2004. He’s the founding member and managing partner of Coastal Vascular Center, which has three convenient locations in Oxnard, Camarillo, and Simi Valley, California.

Dr. Albaugh completed a fellowship in vascular surgery at Virginia Commonwealth University in Richmond. He’s a fellow of the American College of Surgeons and holds board certifications in general surgery and vascular surgery. Prior to founding Coastal Vascular Center, he was the medical director at St. John’s Regional Medical Center Peripheral Vascular Laboratory and the Pleasant Valley Wound Care Center in Camarillo, California.

In his work at Coastal Vascular Center, Dr. Albaugh is regarded as a regional expert in complex limb revascularization, carotid endarterectomy, endovascular and open aortic surgery, wound care, and the treatment of varicose veins and venous insufficiency. 

Outside of his medical career, Dr. Albaugh is a member of the United States Navy Reserve, where he serves as a commander and has a variety of awards and citations. He lives with his wife, Anne, in Ventura County. He looks forward to improving his patients’ quality of life at Coastal Vascular Center.