About

About

Dr. Greenwald is dedicated to minimally invasive (laparoscopic)techniques for all types of colon and rectal surgery and has established protocols at North Shore Hospital to ensure easy, safe, and rapid recovery after surgery. He performs diagnostic and therapeutic colonoscopies, and he is very experienced at both office and operative management of anal and rectal disorders such as hemorrhoids and fissures.

Credentials

Credentials

  • Board certifications

    • Surgery - American Board of Surgery

    • Colon/Rectal Surgery - American Board of Colon and Rectal Surgery

  • Administrative titles

    • Chief - Colorectal Clinical Services of Surgery - Division of General Surgery, North Shore University Hospital

  • Academic titles

    • Assistant Professor, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell

  • Medical school

    • Albert Einstein College of Medicine

  • Residencies

    • Montefiore Medical Center - Moses Division

  • Internships

    • Montefiore Medical Center - Moses Division

  • Fellowships

    • St Francis Hospital

  • Affiliations

Locations & insurance

Locations & insurance

310 East Shore Road, Suite 203Great Neck, NY 11023

Insurance information

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Patient ratings & comments

Patient ratings & comments

Unlike websites where anyone can post doctor reviews, only actual patients can provide information by completing the survey sent to them by Press Ganey. Learn more.

4.8 out of 5 4.8 out of 5 rating
| 160.0 patient ratings & 54 patient comments

Friendliness/courtesy of the care provider

4.8 out of 5 4.8 out of 5 rating

Explanations the care provider gave you about your problem or condition

4.8 out of 5 4.8 out of 5 rating

Concern the care provider showed for your questions or worries

4.8 out of 5 4.8 out of 5 rating

Care provider's efforts to include you in decisions about your treatment

4.8 out of 5 4.8 out of 5 rating

Information the care provider gave you about medications(if any)

4.8 out of 5 4.8 out of 5 rating

Instructions the care provider gave you about follow up care (if any)

4.8 out of 5 4.8 out of 5 rating

Degrees to which care provider talked with you using words you could understand

4.9 out of 5 4.9 out of 5 rating

Amount of time the care provider spent with you

4.8 out of 5 4.8 out of 5 rating

Your confidence in this care provider

4.9 out of 5 4.9 out of 5 rating

Likelihood of your recommending this care provider to others

4.9 out of 5 4.9 out of 5 rating

Most recent comments

Patient comments are gathered from the Press Ganey Pateint Satisfaction Survey. Comments are displayed in their entirety and are anonymous for patient privacy.

07/19/2018
"Very good."
07/18/2018
"Dr. Greenwald is the "best.""
07/17/2018
"I have found Dr. Greenwald to be an excellent surgeon. I am most fortunate to have winded up literally in his hands. He is so well-informed and very thorough in dealing with my ulcerated colitis, removal of my colon, creating a J-pouch and finally a full reversal from my ostemy bag. So very happy with outcome and would highly recommend him to anyone with colon issues. I'm sure his excellence in health issues & medical treatments expands far beyond just colon problems."
06/27/2018
"Dr. Greenwald was caring & kind. I had some difficulty in the hospital and I found him thoughtful & thorough. He is an asset o your team."
05/05/2018
"Dr. Greenwald made me feel completely confident & looked after. I trust him 100% as my surgeon."
04/23/2018
"Dr. is extremely smart, well organized, thorough, excellent follow up with test results and progress so far."
03/28/2018
"Dr. was very thorough - explained everything step by step. Took me at last second and made time to see me."
03/28/2018
"I would recommend my care provider he and staff was excellent"
03/08/2018
"Dr. Greenwald is amazing, caring, and professional. The staff is the best I have seen in a long time."
03/03/2018
"the Dr and his staff are pros pros I felt totally comfortable in their ability to handle my problem"
03/02/2018
"On the mark! Pre-op & post-op treatment was amazing."
02/23/2018
"Yes, I definitely will recommend this care providers to others. "
02/20/2018
"Great."
02/10/2018
"Dr. Greenwald made me feel very comfortable and helped to relieve my nervousness about my condition. "
02/07/2018
"Dr. Greenwald is a very professional doctor who works in a group of surgeons who are most caring & professional."
02/06/2018
"Simply the best!!"
01/24/2018
"In all honesty, there is not another surgeon that could take Dr. Greenwald's place."
01/05/2018
"Dr. Greenwald saved my life!"
12/31/2017
"in my mind he is the best of the best"
12/02/2017
"Very knowledgeable - very eloquent professional."
11/18/2017
"So far dr. Greenwald has been an excellent in treating me. You couldn't be in better hands."
08/25/2017
"Sure did recommend MD Greenwald."
08/05/2017
"Excellent experience"
07/05/2017
"I have been visiting Dr. Greenwald since 5-2010, he save my life and helping me get better. He is the best."
06/06/2017
"Good."
06/05/2017
"I went for a surgical consultation so that I would have a surgeon that I trust if I had to have surgery for a bowel obstruction. This was basically just an informational appointment to meet Dr. Greenwald."
03/11/2017
"excellant"
01/02/2017
"Dr Greenwald is an amazing, caring person. I would not hesitate to recommend him to others in need of a surgeon."
12/09/2016
"Positive experience, provider was very reliable, knowledgeable & understanding."
12/08/2016
"Only good experience."
12/05/2016
"Dr. Greenwald is a very adept surgeon. He is very gentle when dealing with the area of concern. However, he is very quick and does not give you that much time to ask questions."
11/22/2016
"Dr. Greenwald is the best gastro surgeon I have run across and truly knows this area very well. Excellent surgeon in all aspects."
11/09/2016
"Dr.Greenwald is very professional and knowledgeable. He made me feel very comfortable about my procedure. I feel so much better since my surgery. I will recommend him to others."
11/03/2016
"He is top notch!"
08/18/2016
"The best - Highly recommended."
05/21/2016
"The doctor was nice, and caring. I should of asked more questions. I wish he went into more detail on what the operation process was if me be. I should of asked though."
05/10/2016
"Dr. Greenwald saved my life. He is terrific !"
04/07/2016
"Excellent."
03/22/2016
"Number #1 surgeon. Marc Greenwald."
03/03/2016
"Certainly I will."
02/06/2016
"I would have preferred a little more modesty. . A chance to be covered with a sheet privately maybe."
12/21/2015
"Dr. Greenwald & staff were very professional."
12/10/2015
"Very good experience."
10/27/2015
"Good"
09/22/2015
"The procedure did not work for me if I have to go back for further treatment (surgery) I would go back to Dr. Greenwald."
07/20/2015
"Excellent experience - very impressed with his care & knowledge of my problem -"
06/04/2015
"Have NOTHING bad to say."
01/23/2015
"Very good experience - Just doctor -"
10/28/2014
"Good."
10/23/2014
"Slow to warm yet _____ competent. Kind. Caring. Proficient!!"
10/06/2014
"Excellent doctor."
07/01/2014
"Dr. Greenwald is TOPS - extremely knowledgeable & it's clear he's meant for this!"
06/13/2014
"This was one of the worst doctor experiences I ever had. Doctor was detached, bored and indifferent, probably because he did not view me as a surgical case."
03/19/2014
"Dr. Greenwald is very kind and very knowledgeable."

In the news

In the news

In the news
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