Photo of Daniel O. Herzig, M.D., F.A.C.S., F.A.S.C.R.S.

Daniel O. Herzig M.D., F.A.C.S., F.A.S.C.R.S.

  • (503) 494-4373
    • Associate Professor of Surgery, Division of Gastrointestinal and General Surgery School of Medicine

Dr. Herzig earned his medical degree from Vanderbilt University and completed his surgical residency at Brown Medical School. At Brown, he won over a dozen awards for excellence in teaching, patient care, and research, including the Outstanding Resident Physician award in his last year. He went on to complete advanced training in colon and rectal surgery, including minimally invasive surgery and endoscopy at the University of Texas, Houston.

Dr. Herzig joined the faculty at OHSU in 2005. He completed the Human Investigations Program in 2009, and was promoted to Associate Professor in 2012. He is part of the OHSU Digestive Health Center and the OHSU Knight Cancer Institute. He specializes in the treatment of both cancerous and noncancerous diseases of the colon and rectum. Dr. Herzig is committed to providing the highest quality personal service to each individual. Because of this, he has been recognized as one of "Portland's Top Doctors" and has been named as one of "America's Top Surgeons."

Dr. Herzig's research interests include colorectal surgery outcomes, hereditary colorectal cancer syndromes, timing of surgery, and non-operative management of rectal cancer. He has started the state's first Colorectal Cancer Registry and has collaborated with other researchers at OHSU to continue this institution's leadership in colorectal cancer research.

Institutionally, he is the moderator of the weekly GI Oncology Tumor Board, and is the Surgical Director for gastroenterology endoscopy privileging. Regionally, he is the President of the Oregon Chapter of the American College of Surgeons for the 2014-2016 term, as well as the Local Arrangements Chair of the North Pacific Surgical Association for 2015. Nationally, he is on the Communications Committee for the Society for Surgery of the Alimentary Tract and the Clinical Practices Guidelines Committee for the American Society of Colon and Rectal Surgeons. He is sought after institutionally, locally, and nationally to lecture on colon and rectal cancer, Inflammatory Bowel Disease (IBD), Crohn's disease, and pelvic floor disorders.

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  • M.D., Vanderbilt University School of Medicine, Nashville Tennessee 1999
  • Residency:

    • General Surgery, Brown University/Rhode Island Hospital, Providence, RI  1999-2004
  • Fellowship:

    • Colorectal Surgery, University of Texas Health Science Center at Houston, Houston, TX, 2004-2005
  • Certifications:

    • American Board of Surgery, 2005
    • Colon and Rectal Surgery, 2006

Memberships and associations

  • Fellow, American College of Surgeons


  • "The American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for the Management of Inherited Polyposis Syndromes." Diseases of the Colon and Rectum In: , Vol. 60, No. 9, 01.09.2017, p. 881-894.
  • "The authors reply [2]." Diseases of the Colon and Rectum In: , Vol. 60, No. 7, 01.07.2017, p. e596-e597.
  • "Clinical Practice Guidelines for the Surgical Treatment of Patients with Lynch Syndrome." Diseases of the Colon and Rectum In: , Vol. 60, No. 2, 01.02.2017, p. 137-143.
  • "Variation in the Use of Chemoradiotherapy for Stage II and III Anal Cancer : Analysis of the National Cancer Data Base." Annals of Surgical Oncology In: , 21.07.2016, p. 1-7.
  • "Nomogram for Predicting Overall Survival and Salvage Abdominoperineal Resection for Patients with Anal Cancer." Diseases of the Colon and Rectum In: , Vol. 59, No. 1, 01.01.2016, p. 1-7.
  • "HIV positivity and anal cancer outcomes : A single-center experience." American Journal of Surgery  In: , 30.10.2015.
  • "Psychiatric Illness is a Disparity in the Surgical Management of Rectal Cancer." Annals of Surgical Oncology  In: , 11.09.2015.
  • "Trends in the Surgical Management of Crohn’s Disease." Journal of Gastrointestinal Surgery In: , Vol. 19, No. 10, 19.08.2015, p. 1862-1868.
  • "Effect of adding mFOLFOX6 after neoadjuvant chemoradiation in locally advanced rectal cancer : A multicentre, phase 2 trial." The Lancet Oncology  In: , Vol. 16, No. 8, 01.08.2015, p. 957-966.
  • "The impact of delaying elective resection of diverticulitis on laparoscopic conversion rate." American Journal of Surgery In: , Vol. 209, No. 5, 01.05.2015, p. 913-919.
  • "Strictureplasty for Treatment of Crohn’s Disease : an ACS-NSQIP Database Analysis." Journal of Gastrointestinal Surgery In: , Vol. 19, No. 5, 01.05.2015, p. 905-910.
  • "Molecular markers for colon diagnosis, prognosis and targeted therapy." Journal of Surgical Oncology In: , Vol. 111, No. 1, 01.01.2015, p. 96-102.
  • "Chemoradiotherapy with a radiation boost for anal cancer decreases the risk for salvage abdominoperineal resection : analysis from the national cancer data base." Annals of Surgical Oncology In: , Vol. 21, No. 11, 01.10.2014, p. 3616-3620.
  • "Initial surgical management of ulcerative colitis in the biologic era." Diseases of the Colon and Rectum In: , Vol. 57, No. 12, 2014, p. 1358-1363.
  • "Increasing the number of lymph nodes examined after colectomy does not improve colon cancer staging." Journal of the American College of Surgeons In: , Vol. 218, No. 5, 2014, p. 1004-1011.
  • "Addressing the appropriateness of elective colon resection for diverticulitis : A report from the SCOAP CERTAIN collaborative." Annals of Surgery In: , Vol. 260, No. 3, 2014, p. 533-539.
  • "Avirtual reality endoscopic simulator augments general surgery resident cancer education as measured by performance improvement." Journal of Cancer Education In: , Vol. 29, No. 2, 2014, p. 333-336.
  • "Colorectal cancer emergencies." Journal of Gastrointestinal Cancer In: , Vol. 44, No. 2, 06.2013, p. 132-142.
  • "Surgeon leadership enables development of a colorectal cancer biorepository." American Journal of Surgery In: , Vol. 205, No. 5, 05.2013, p. 563-565.
  • "Stage III & IV colon and rectal cancers share a similar genetic profile : A review of the Oregon Colorectal Cancer Registry." American Journal of Surgery In: , Vol. 205, No. 5, 05.2013, p. 608-612.
  • "Warm water infusion during sedated colonoscopy does not decrease amount of sedation medication used." Gastrointestinal Endoscopy  In: , Vol. 76, No. 6, 12.2012, p. 1182-1187.
  • "Effect of Surgical Approach on 30-Day Mortality and Morbidity After Elective Colectomy : A NSQIP Study." Journal of Gastrointestinal Surgery In: , Vol. 16, No. 6, 06.2012, p. 1212-1217.
  • "Adoption of laparoscopy for elective colorectal resection : A report from the surgical care and outcomes assessment program." Journal of the American College of Surgeons In: , Vol. 214, No. 6, 06.2012.
  • "Use and outcomes of emergent laparoscopic resection for acute diverticulitis." American Journal of Surgery In: , Vol. 203, No. 5, 05.2012, p. 639-643.
  • "Loss of expression of the cancer stem cell marker aldehyde dehydrogenase 1 correlates with advanced-stage colorectal cancer." American Journal of Surgery In: , Vol. 203, No. 5, 05.2012, p. 649-653.
  • "The impact of practice environment on laparoscopic colectomy utilization following colorectal residency : A survey of the ASCRS Young Surgeons." Colorectal Disease In: , Vol. 14, No. 3, 03.2012, p. 374-381.
  • "Care of the patient with anorectal trauma." Clinics in Colon and Rectal Surgery  In: , Vol. 25, No. 4, 2012, p. 210-213.
  • "Utilization of laparoscopic colectomy in the united states before and after the clinical outcomes of surgical therapy study group trial." Annals of Surgery In: , Vol. 254, No. 2, 08.2011, p. 281-288.
  • "Specialized practice reduces inpatient mortality, length of stay, and cost in the care of colorectal patients." Diseases of the Colon and Rectum In: , Vol. 54, No. 7, 07.2011, p. 780-786.
  • "Nonfamilial Adenomatous Polyposis/Nonhereditary Nonpolyposis Colorectal Cancer Hereditary Polyposis and Cancer Syndromes (MAP, Syndrome-X, Muir-Torre, etc)." Seminars in Colon and Rectal Surgery In: , Vol. 22, No. 2, 06.2011, p. 82-87.

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