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Dr. Nasseri and Dr. Barnajian have the surgical training and unparalleled skills that have made them renowned leaders in colorectal surgery and the treatment of hemorrhoids. And, their excellent results in this area have placed them among the most trusted and esteemed in their field. In addition, Dr. Nasseri is the co-founder, and lead investigator in the SGLA Research Foundation, that remains at the forefront of colorectal studies and innovative developments in colon and rectal surgical techniques. As two of the top hemorrhoid doctors in Southern California, Dr. Nasseri and Dr. Barnajian offer a variety of minimally invasive procedures for the treatment of hemorrhoids, utilizing the latest technologies and surgical modalities available.  

Dr. Yosef Nasseri


Dr. Yosef Nasseri is a founding member of The Surgery Group of Los Angeles, a Los Angeles based physician group providing a comprehensive approach to surgical care through advanced technology, long-term patient follow-up, and direct physician access.


Dr. Nasseri is double board-certified in general and colorectal surgery and specializes in cutting-edge robotic and minimally invasive techniques for the treatment of colon and rectal cancers, inflammatory bowel disease, benign anorectal diseases, a variety of hernias, and general surgery.

As Director of the Colorectal Center at the Surgery Group of Los Angeles, Dr. Nasseri is a leader in the diagnose and treat of all conditions related to the colon or rectum. He has extensive experience in dealing with more common conditions, to include Hemorrhoids, Anal Warts & Constipation, as well as chronic illnesses such as Crohn’s Disease and Colitis. 

Dr. Moshe Barnajian


Dr. Moshe Barnajian is a board certified colorectal and general surgeon who is committed to providing comprehensive and compassionate care through minimally invasive and advanced surgical techniques at the The Surgery Group of Los Angeles.


His specialized training has provided him with the advanced expertise in all aspects of colon, rectal, and anal surgery from laparoscopic and robotic colon resection for colorectal cancer and inflammatory bowel disease to complex anorectal disease including hemorrhoids, fissures, fistula and HIV related anorectal disorders. 


Dr. Barnajian is a member of the American College of Surgeons, American Society of Colon and Rectal Surgeons and the European Association of Endoscopic Surgery. He has participated and lectured in both national and international meetings and has published multiple peer reviewed articles in prestigious journals including Colorectal Disease. He is a medical peer reviewer for multiple colorectal journals including Techniques in Coloproctology and Colorectal Disease.

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