Dr. Maher A Abbas

Consultant Colorectal Surgeon

Dr. Maher A. Abbas is an internationally known colorectal and gastrointestinal surgeon with 28 years of experience in medicine and surgery. To date he has conducted more than 18,000 operations and procedures. He is the recipient of 29 honor awards including America’s Top Surgeons, America’s most compassionate Doctors, Super Doctors of Southern California, and Los Angeles Magazine Top Doctors. He is professor of surgery and he is senior examiner of the American Board of Colon and Rectal Surgery.

Dr. Abbas is on the editorial board of several scientific journals and is associate editor of the Diseases of Colon and Rectum, the official journal of the American Society of Colon and Rectal Surgeons. He has authored over 150 scientific publications and has delivered over 300 presentations in the USA and the world.
Dr. Abbas was formerly the regional chief of colorectal surgery in the Southern California Permanente Medical Group, the founding chair of the center for minimally invasive and robotic surgery, and director of the National Center for Excellence in Colorectal Surgery. Dr. Abbas was one of the founders of the Cleveland Clinic in Abu Dhabi and he held the first chairmanship of the Digestive Disease Institute.



  • Bachelor’s Degree of Science, Emory University, Georgia, USA
  • Doctor of Medicine, Stanford University Medical School, California, USA
  • Surgery Residency, Mayo Clinic, Arizona, USA
  • Colorectal Surgery Fellowship, Cleveland Clinic Florida, Florida, USA
  • Fellow, American College of Surgeons
  • Fellow, American Society of Colon and Rectal Surgeons
  • Honorary Fellow, Philippine Society of Colon and Rectal Surgeons
  • Diplomate, American Board of Surgery
  • Diplomate, American Board of Colon and Rectal Surgery


  • Interventional endoscopy, colonoscopy, sigmoidoscopy, proctoscopy, anoscopy
    Colon cancer screening, polyp removal, tumor resection, stricture management, minor treatment of hemorrhoids, management of radiation inflammation
    Open and minimally invasive camera surgery (laparoscopic, robotic)
  • Open and minimally invasive surgery (Laparoscopic, robotic)
    • Colon and rectal cancer, recurrent colon and rectal cancer, polyps, rare pelvic tumors, desmoid tumors, Crohn’s disease, ulcerative colitis, pelvic pouch surgery, reoperative pelvic surgery, diverticulitis, bowel obstruction, ileostomy and colostomy management, wound management, scar revision
  • Pelvic floor conditions treatment
    Incontinence, complex anal and rectal fistula (vagina, bladder, rectum) anal or rectal prolapse, rectocele, childbirth trauma, constipation, difficulty with defecation, pilonidal hair cyst, hidradenitis suppurativa infection of skin, anal and rectal ultrasound, anorectal manometry pressure studies
  • Proctology
    Hemorrhoids, anal fistula, fissure, warts, anal dysplasia and cancer, transmitted infectious diseases, skin tags, anal and buttocks wound scar management

Book an appointment with Dr. Maher A Abbas