About The Wisconsin Colon & Rectal Clinic


Wisconsin Colon & Rectal Clinic offers specialized care of disorders and diseases of the colon, rectum and anus. We aim to serve you with the highest level of expertise and compassion possible. We are continuously modifying our practice to meet your needs and the health of our community.


The clinic was established in 1986 by Dr. M. J. Falk, who had practiced with one of Green Bay’s larger groups for many years. Dr. Falk, a family practitioner, envisioned his care of patients as a conduit of The Lord’s healing works. With an awareness of his patients’ physical and spiritual needs, Dr. Falk endeavored to treat the wholeness of his patients. He practiced this way until he retired in 2003.

In 1993, Dr. Falk’s son, Dr. Peter M. Falk, joined the practice as the first fellowship-trained colon and rectal surgeon in Northeast Wisconsin. The practice grew with the addition of more family practitioners and surgeons. In 2002, Dr. Scott L. Ruggles became the second fellowship-trained colon and rectal surgeon in the group. Over the next few years, the practice became increasingly more focused on surgical services and changed its name to NEW Surgical Associates. Dr. Marc B. Grodsky subsequently joined the practice.  He is also fellowship-trained and board certified in colon and rectal surgery.  In 2014, a new chapter began when the clinic became Wisconsin Colon & Rectal Clinic to specialize primarily in colon and rectal care. While our name has changed, we carry on Dr. M. J. Falk’s tradition of Christian-based care.


The board-certified colon and rectal surgeons at Wisconsin Colon & Rectal Clinic provide a full range of colorectal services. Such services include screening for colorectal polyps and cancer (colonoscopy); assessment of problems like anal pain, abdominal pain and constipation; treatment of anorectal conditions like hemorrhoids, anal fissure, anal abscess and fistula, and anal incontinence; treatment of pilonidal abscess and pilonidal cyst; treatment of diverticulosis and diverticulitis; and operations for colon and rectal cancer, inflammatory bowel disease (Crohn’s disease and ulcerative colitis), and rectal prolapse. Minimally invasive operations (laparoscopy and robotic surgery) are also considered in certain cases.
Colonoscopy, with or without sedation, can also be performed in the office setting for certain patients.  This streamlines the process and can often provide substantial cost savings.


We are able to provide many services in the office setting. For situations when outpatient or inpatient services are needed, the board-certified surgeons have admitting privileges at all four Green Bay area hospitals, including Bellin Memorial Hospital, St. Vincent Hospital, St. Mary’s Hospital Medical Center and Aurora BayCare Medical Center. Our surgeons and staff also strive to be available to you. As our patient, you will have access to our providers 24 hours a day, simply by calling our office number.
Wisconsin Colon & Rectal Clinic makes every effort to ensure our services are accessible to you. We work with most insurance plans in the area. Our nursing staff and billing office will work with you in a respectful manner to ensure the process is as easy as possible.

Colon and rectal diseases comprise a broad range of conditions and ailments, the severity of which can vary from mildly irritating to life threatening. Click here to view info on our services & treatments.

View info about our colon & rectal physicians, nursing staff, reception staff and billing department.

Jesus said “those who are healthy do not need a physician, but the sick do.” [Luke 5:31]. Our mission is seeking Jesus Christ’s healing. God has provided for us and shall supply all our needs. He has sent us peace through Jesus Christ.