Marc J. Casasanta, MD
Colon and Rectal Surgery
Highlights
Age Groups Seen
- Adult 18-65
- Older Adult >65
Languages
- English
Gender
MaleHospital Affiliations
- Nuvance Health - Putnam Hospital
- Nuvance Health - New Milford Hospital
- Nuvance Health - Danbury Hospital
About Marc J. Casasanta
Professional Statement
Dr. Marc Casasanta provides advanced techniques and cutting-edge technology to deliver quality care to the NY/CT area. Dr. Casasanta sees patients ages 18+ and believes that merging surgical principles with state-of-the-art medical sciences allows for the most modern approaches to surgical procedures and enhanced recovery.
His area of expertise include surgical robotics and laparoscopic surgery for all diseases related to the colon, rectum and anus. Dr. Casasanta prides himself in making patients feel at ease when they are faced with tense, overwhelming and even scary diagnoses by educating them on their condition and all options available to treat them.
In his free time, Dr. Casasanta enjoys family movie nights with his kids and ruining a perfectly good walk by trying to golf during it.
See how Dr. Casasanta helps patients in this story: Social worker faces advanced colorectal cancer with strength and support
Get To Know Me
As a surgeon, I realize many factors go into a patient's decision on surgery. I collaborate with patients to discuss all options for their care.
What is the most important thing your patients should expect from their professional relationship with you? What do you expect from them?
I expect patients to know that the care they are receiving from me is the exact level of care I would give to my family members.
How do you spend your personal time when you're not caring for patients?
I love wrestling and playing video games with my kids, doing repairs around the house and going on day trips with the family on weekends.
Why did you choose your specialty and what is its greatest reward?
I chose colon and rectal surgery because I personally have Ulcerative Colitis and by being in this specialty, I can use my perspective as a patient to help others in similar or worse situations.
Expertise
Education
- Fellowship: Greater Baltimore Medical Center, Colon & Rectal Surgery, 2015
- Fellowship: University of Texas Health Science Center San Antonio, Colon & Rectal Surgery, 2014
- Residency: MedStar Union Memorial Hospital at Baltimore, Surgery (General Surgery), 2013
- Internship: MedStar Union Memorial Hospital at Baltimore, Surgery (General Surgery), 2009
- Medical School: New York Medical College, 2008
Board Certifications
- Colon and Rectal Surgery: American Board of Colon and Rectal Surgery
- Surgery (General Surgery): American Board of Surgery
Locations
- Nuvance Health Medical Practice - Colon and Rectal Surgery Danbury
- 111 Osborne Street, Danbury, CT 06810
- Get Directions
- phone: 203-739-7131
- Nuvance Health Medical Practice - General Surgery Norwalk (Stevens St.)
- 30 Stevens Street, Suite D, Norwalk, CT 06850
- Get Directions
- phone: 203-846-3338
- Nuvance Health Medical Practice - Colon and Rectal Surgery Carmel
- 672 Stoneleigh Avenue, Suite C112, Carmel, NY 10512
- Get Directions
- phone: 203-739-7131
- fax: 203-739-1554
- Nuvance Health Medical Practice - Colon and Rectal Surgery Norwalk (Stevens St.)
- 30 Stevens Street, Suite D, Norwalk, CT 06850
- Get Directions
- phone: 203-852-2262
Insurance
- Aetna
- Anthem BlueCross Blue Shield Connecticut
- Capital District Physicians' Health Plan
- Centivo
- Cigna
- ConnectiCare
- Consumer Health Network
- Coventry-Aetna
- Elderplan
- Emblem Health
- EmblemHealth
- Empire BlueCross Blue Shield
- Empire Health Plan
- Empire Plan
- Fidelis Care
- Hamaspik
- Humana Military
- MagnaCare
- Medicaid Connecticut
- Medicaid New York
- Medicare Connecticut
- Medicare New York
- Medicare Railroad
- Multiplan Inc
- MVP Health Care
- Northwell Direct
- Oxford Health Plans
- Tricare Humana Military
- United Healthcare
- US Family Health Plan
- Wellcare
Ratings & Reviews
4.7 out of 5
88 ratings, 12 reviewsProvider star ratings are calculated using patient responses to the provider care questions in our patient experience survey. Below you can see the provider’s star rating and the number of his or her patients who have provided feedback. Ratings depicted represent those clinicians that have at least 30 completed surveys on a rolling 12 month basis.
- 5 out of 5 starsReviewed on 12/14/2025
Very thorough and conscientious, answered all our questions and explained everything in detail. The procedure was exactly what the doctor explained and we were very happy with our visit.
- 5 out of 5 starsReviewed on 12/12/2025
Dr.marc casasanta is one of the best doctors I have had the pleasure of being one of his patients. His surgery on me,and his doctor skills, are first class, excellent 👍 all other hospital ,nurses,and other doctors involved have been very good to.i am very pleased with their services,all involved getting me through my cancer treatments.i thank all involved.
- 5 out of 5 starsReviewed on 12/8/2025
He was a very attentive, gentle doctor.
- 5 out of 5 starsReviewed on 7/23/2025
The absolute BEST. Took excellent care of me and set me straight. You should be Proud of him. All Doctors should be like him
- 5 out of 5 starsReviewed on 7/11/2025
He was very helpful and pleasant.
- 5 out of 5 starsReviewed on 7/10/2025
Dr. Casasanta is an excellent doctor. I highly recommend him.
- 5 out of 5 starsReviewed on 6/30/2025
Dr. Casasanta is on top of the latest developments in robotic surgery and in his field of specialty. He demonstrates caring for the patient and follows up multiple times with each patient to be sure the outcome is positive after surgery.
- 5 out of 5 starsReviewed on 6/16/2025
Dr. Casasanta is a great listener and explained everything clearly. I mentioned my tailbone hurt and he said he thought I should get an MRI. So happy he did! I have a fractured tailbone! Plus, he called me personally, with the results of the MRI, which was nice to hear from the doctor instead of an assistant.
- 5 out of 5 starsReviewed on 6/8/2025
Because of a screw up by the surgical department I was not informed of my surgery ahead of time, Dr. Casasanta calmed my fears, carefully explained the surgery and alleviated my concerns. He is a very caring person.
- 5 out of 5 starsReviewed on 3/20/2025
Great bedside manner. Very competent provider.
- 5 out of 5 starsReviewed on 3/11/2025
He made my mom feel at ease and explained everything so she understood what was happening.
- 5 out of 5 starsReviewed on 3/7/2025
He is a great Dr. I would high Recommend him