Associates in Colon & Rectal Diseases, P.A.


A premier speciality colorectal surgical practice located in Millburn, Morristown, and Denville New Jersey since 1972 provides individualized, innovative, and efficient care to all patients.  We serve and treat patients throughout the TriState area.


Saint Barnabas Medical Center, Livingston, New Jersey

Overlook Hospital,  Summit, New Jersey

Morristown Memorial Hospital, Morristown, New Jersey

Saint Clare’s Hospital
    Denville, New Jersey

Bayonne Medical Center  
    Bayonne, New Jersey

   Robert D. Orringer, M.D.         Mark E. Gilder, M.D.      Debra R. Tarantino, M.D.

Our Practice

We are a Board Certified specialty practice in Colon & Rectal surgery.  Associates in Colon & Rectal Diseases, P.A. provides complete services in the practice of colon and rectal surgery.


Office Hours by Appointment Only

Monday-Friday 9:00am -  5:00pm

Associates in Colon & Rectal Diseases, P.A

  1. (973)467-2277 Office

  2. (973)267-1225 Office

Associates in Colon & Rectal Diseases


231 Millburn Avenue

Millburn, New Jersey 07041

  1. (973)467-2277  Office         (973) 467-4037  Fax

111 Madison Ave 

Suite  #312

Morristown, New Jersey 07960

  1. (973)267-1225  Office         (973) 993-9190  Fax

16 Pocono Road

Suite # 103

Denville, NJ 07834

(973) 267-1225  Office

Minimally Invasive Laparoscopic Colorectal Surgery

Anorectal Surgery

Colonoscopy / Intraluminal Intervention

Pelvic Floor Evaluation

Transrectal Ultrasound

Major Abdominal Intestinal Surgery

Enterostomal Therapy Evaluation and Management