John W. Cromwell, MD


Associate Chief Medical Officer & Director of Surgical Quality and Safety
Director, Division of Gastrointestinal Surgery, Minimally-Invasive and Bariatric Surgery
Clinical Associate Professor of Surgery  - Gastrointestinal, Minimally-invasive and Bariatric Surgery

Contact Information

Primary Office: 4601 JCP
200 Hawkins
Iowa City, IA 52242
Phone: 319-384-7359



BS, Chemistry, Nebraska Wesleyan University
MD, University of Minnesota Medical School

Fellowship, Surgical Infectious Disease, University of Minnesota Hospital & Clinics
Fellowship, Research, University of Minnesota Cancer Center
Residency, General Surgery, University of Minnesota Hospital & Clinics
Fellowship, Colon and Rectal Surgery, University of Texas Affiliated Hospitals

Licensure and Certifications

Diplomate, American Board of Colon and Rectal Surgery
Diplomate, American Board of Surgery
Fellow, American College of Surgeons
Fellow, American Society of Colon & Rectal Surgeons
Iowa Medical License, Iowa Board of Medicine
Board Certified, Colon & Rectal Surgery, American Board of Colon & Rectal Surgery
Board Certified, General Surgery, American Board of Surgery

Research Summary

Dr. Cromwell conducts clinical research related to complex medical systems.

Selected Publications

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Charlton M, Mattingly-Wells L, Marcet J, McMahon Waldschmidt B, Cromwell J.  Association between surgeon characteristics and their preferences for guideline-concordant staging and treatment for rectal cancer.  American Journal of Surgery.  2014 June 8. 

Hrabe J, Sherman S, Charlton M, Cromwell J, Byrn J.  Effect of BMI on outcomes in proctectomy.  Disease of the Colon and Rectum.  2014 May. 57(5):608-15.

Sherman S, Hrabe J, Charlton M, Cromwell J, Byrn J.  Development of an Improved Risk Calculator for Complications in Proctectomy.  Journal of Gastrointestinal Surgery;  2014. 

Fang S, Cromwell J, Wilkins K, Eisenstat T, Notaro J, Alva S, Bustami R, Chinn B.  Is the abdominal repair of rectal prolapse safer than perineal repair in the highest risk patients? An NSQIP analysis.  Disease of the Colon and Rectum.  2012 November. 55(11):1167-72.

Schey R, Cromwell J, Rao S.  Medical and surgical management of pelvic floor disorders affecting defecation.  The American Journal of Gastroenterology.  2012 November. 107(11):1624-33.

Cromwell J, Santiago L, Marcet J.  Treatment of rectal cancer.  The New England Journal of Medicine.  2006 December 7. 355(23):2487.

Zhang X, Cromwell J, Kunjummen B, Yee D, Garcia-Aguilar J.  The alpha2 and alpha3 integrins are required for morphologic differentiation of an intestinal epithelial cell line.  Surgery.  2003 April. 133(4):429-37.

Friel C, Cromwell J, Marra C, Madoff R, Rothenberger D, Garcia-Aguilar j.  Salvage radical surgery after failed local excision for early rectal cancer.  Diseases of the Colon and Rectum.  2002 July. 45(7):875-9.

Garcia-Aguilar J, Cromwell J, Marra C, Lee S, Madoff R, Rothenberger D.  Treatment of locally recurrent rectal cancer.  Diseases of the Colon and Rectum.  2001 December. 44(12):1743-8.

Yiu R, Wong S, Cromwell J, Madoff R, Rothenberger D, Garcia-Aguilar J.  Pelvic wall involvement denotes a poor prognosis in T4 rectal cancer .  Disease of the Colon and Rectum.  2001 November. 44(11):1676-81.

Date Last Modified: 06/06/2016 - 13:17:48