Our Physicians

Marc D. Colton, M.D.

Dr. Marc Colton

Dr. Marc Colton received his medical degree from Drexel University College of Medicine in 1989. He completed his general surgery and urology training at Temple University Hospital and urologic oncology training at the Fox Chase Cancer Center in Philadelphia. Dr. Colton has been in practice in Morris County since 1995. In 1997 he started Morris Urology and remains the managing partner. Dr. Colton is certified by the American Board of Urology.

In 2003 Dr. Colton performed the first minimally invasive laparoscopic radical nephrectomy at Saint Clares Hospital. This surgical procedure remains the standard of care in which kidney tumors are managed. Also, in 2003 Dr Colton performed the first Greenlight laser vaporizaton of the prostate in the State of New Jersey. He has lectured and trained other physicians in this minimally invasive procedure that has virtually replaced more invasive procedures in managing patients with symptomatic benign prostatic hypertrophy. In 2007, Dr. Colton was instrumental in bringing robotic technology to Saint Clares Hospitals.

Dr. Colton has been named annually in Castle Connolly Top Doctors, New York Metro Area since 1999, and was selected for "Top Docs" in the 2009, 2010, 2011, 2012 and 2013 issues of Inside Jersey magazine as well as the 2001, 2003, 2005 and 2008 issues of New Jersey Monthly magazine. Dr Colton is also listed as one of the 297 Top Cancer Doctors in the July 2012 edition of Inside Jersey.

Dr. Colton has lectured and shared his expertise on prostate health and prostate cancer awareness throughout the community and at local companies. He has also organized several symposiums on prostate cancer for the general public and has been a guest on radio and local cable television programs to discuss prostate cancer treatments and alternatives.

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Gregg E. Zimmerman, M.D.

Dr. Zimmerman

Dr. Zimmerman earned his medical degree from the State University of New York at Stony Brook and completed his residency training in urology at the University of Florida. He completed a urologic oncology fellowship at Roswell Park Cancer Institute in Buffalo, New York, with specialty training in robotic surgery and advanced laparoscopy.

Dr. Zimmerman is the Medical Director of Robotic Surgery at St. Clare's Hospital. In addition, as proctor for the da Vinci robot and for single site laparoscopic surgery, he trains other surgeons how to perform these advanced surgeries. Dr. Zimmerman performed the first single site laparoscopic nephrectomy in the State of New Jersey.

Dr. Zimmerman practices all aspects of urology, including stones, incontinence, BPH, erectile dysfunction, infertility, and oncology with particular emphasis on minimally invasive techniques.Dr. Zimmerman iscertified by the American Board of Urology.

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Morris Urology in April 2014 Natural Awakenings Magazine

Morris Urology is featured in the
April 2014 edition of Natural Awakenings Magazine:
Morris Urology Institutes New Wellness Program


2013 top doc

Morris Urology is pleased to announce that Dr. Colton has been nominated by Inside New Jersey & Castle Connolly Top Doc’s of 2013


Dr. Zimmerman performed the 1,000th case of robot-assisted, minimally invasive surgery at the Center for Robotic Surgery using the da Vinci Si Surgical System.
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Check out Dr. Colton in the September Issue of Renal & Urology News!
Urology Pharmacy Service Benefits Doctors and Patients


Learn about the latest updates in Urology and Urogynecology


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