Andreas M. Kaiser

Professor of Clinical Surgery
Andreas M. Kaiser, MD, FACS, FASCRS

Areas of treatment:

Colon and Rectal Surgery
Colon Cancer
Rectal Cancer
Anal Cancer
Primary, Recurrent Cancers, Palliative Setting
Inflammatory Bowel Disease (Ulcerative Colitis, Crohn's Disease)
Sphincter-Saving Surgery for Cancer or Inflammatory Bowel Disease
Transanal Endoscopic Microsurgery for Rectal Polyps and Cancer (TEM)
Continence Preservation
Continent Ileostomy (Kock Pouch, T-Pouch)
Acute Diverticulitis
Functional Disorders of the Colon and Rectum (Prolapse, Constipation, Pelvic Floor Dysfunction)
Benign Disorders of the Anus (Hemorrhoids, Anal Fissures, Anorectal Abscess, Laparoscopic Surgery, including 3D laparoscopy
Robotic Surgery
Transanal Endoscopic Microsurgery (TEMS)
Transanal Minimally Invasive Surgery (TAMIS)
Transfusion-Free Surgery
Fecal Incontinence, including sphincter reconstruction, artificial bowel sphincter (ABS, Neosphincter), sacral nerve stimulation (Interstim), Secca procedure and Solesta Injection)
Pelvic floor dysfunction
Stapled hemorrhoidectomy (PPH)
Anophysiology Testing (Manometry, EMG, Endorectal Ultrasound, Pudendal Nerve Testing)


  • Colorectal Surgery


  • Department of Surgery


  • English
  • French
  • German
  • Italian

Andreas M. Kaiser, MD, FACS, FASCRS

Professor of Clinical Surgery

Practicing locations:

  • Keck Hospital of USC
  • USC Healthcare Center 4
  • USC Norris Comprehensive Cancer Center and Hospital

About this doctor:

Andreas M Kaiser, MD, FACS, FASCRS, a Professor of Clinical Surgery, graduated in 1988 from the University of Zurich in Switzerland. After an internship in Surgical Pathology, Dr. Kaiser trained in General Surgery at the University Hospital of Zurich (1990-1998), interrupted by a two year research fellowship at Harvard Medical School. He completed a fellowship in Visceral Surgery at the University Hospital in Zurich, and in Colorectal Surgery at the Keck School of Medicine at USC. In 2001, Dr. Kaiser joined the USC faculty, and from 2008-2009, he served as Interim Chairman of the Department of Colorectal Surgery. He is a Fellow of the American College of Surgeons (FACS) and the American Society of Colon and Rectal Surgeons (FASCRS), and a member of several national and international professional associations and committees.

Dr. Kaiser has a special interest in colorectal diseases and provides a comprehensive and interdisciplinary treatment in the management of colorectal and anal cancer (primary, recurrent cancers, palliative setting), inflammatory bowel disease, acute diverticulitis, functional disorders of the colon and rectum, and benign disorders of the anus. He was a national expert/preceptor for the stapled hemorrhoidectomy (PPH); he is one of few experts nationwide performing continent ileostomies and was instrumental in the development of the T-pouch. He is an expert for evaluation and treatment of fecal incontinence and also one of few surgeons performing the Artificial Bowel Sphincter; most recently, he added the transanal endoscopic microsurgery for rectal polyps and early rectal cancer (TEMS), Sacral Nerve Stimulation (Interstim) for fecal incontinence, and 3D laparoscopy to the services offered at USC.

Dr. Kaiser’s major areas of research interest include Colorectal Cancer, Inflammatory Bowel Disease, Diverticulitis, and Fecal Incontinence.

Dr. Kaiser is not only committed to patient-care, but also to research and education. He has written numerous articles, book chapters, including his own book “McGraw-Hill Manual of Colorectal Surgery”. He is Editor-in-Chief of “Clinical and Experimental Gastroenterology”, and Associate Editor of “Diseases of the Colon and Rectum”, the official journal of the American Society of Colon and Rectal Surgeons; in addition, he serves on the editorial boards of the “World Journal of Gastroenterology”, “World Journal of Gastrointestinal Pathophysiology”, “The Open Colorectal Cancer Journal”, and “The Open Surgical Oncology Journal”. He is/was a member of several national committees (membership committee (chair), standards committee, program committee, CME committee). He served as Guest Editor on Hereditary Colorectal Cancer for “Seminars in Colon and Rectal Surgery”, and was the lead author on a ASCRS Task Force for “New Technologies for Fecal Incontinence”.


Swiss Federal Diploma as Physician, University of Zurich, 1988
Doctor of Medicine, University of Zurich, 1989


City of Zurich Hospital Tremli, Pathology, 1989 - 1990


University Hospital of Zurich, Surgery and Pediatric Surgery, 1990 - 1993, 1995 - 1998


Harvard Medical School, Beth Israel Hospital, Surgical Research, 1993 - 1995
University Hospital of Zurich, Visceral Surgery, 1998 - 2000
USC Division of Colorectal Surgery Colon and Rectal Surgery, 2000 - 2001


EMH Swiss Board Certification in General Surgery
EBSQ Board Certification in Coloproctology
FMH Swiss Subspecialty Board Certification in Visceral Surgery

Professional society memberships:

American College of Surgeons (ACS)
American Medical Association (AMA)
American Pancreatic Association (APA)
American Society of Colon and Rectal Surgeons (ASCRS)
Association for Academic Surgery (AAS)
Association of Invasive and Operative Physicians of Switzerland (Foederatio Medicorum Scrutantium, FMS)
European Society of Coloproctology (ESCP)
International Society of University Colorectal Surgeons (ISUCRS)
Massachusetts Medical Society (MMS)
Society of American Gastrointestinal and Endoscopic Surgeons (SAGES)
Society for Surgery of the Alimentary Tract (SSAT)
Society of Laparoendoscopic Surgeons (SLS)
Society of University Surgeons (SUS)
Southern California Society of Colon and Rectal Surgeons (SCSCRS)
Swiss Medical Association (Foederatio Medicorum Helveticorum-FMH)
Swiss Society of Visceral Surgery (SSVC)
Swiss Surgical Society (SGC)