
Gregory Mark Ackert, MD
Gastroenterology
Highlights
Languages
- English
Gender
MaleAbout Gregory Mark Ackert
Locations
- Gastroenterology, Ambulatory Care at Lake Success
- 4 Ohio Drive, New Hyde Park, NY 11042
- Get Directions
- Phone: 516-775-4545
- Fax: 516-775-4646
- Endoscopy, Ambulatory Care at Lake Success
- 4 Ohio Drive, New Hyde Park, NY 11042
- Get Directions
- Phone: 516-775-4545
- Fax: 516-775-4646
Expertise
Education
- Medical School: NYU School of Medicine, 1978
Board Certifications
- Gastroenterology: American Board of Internal Medicine, 1985
- Internal Medicine: American Board of Internal Medicine, 1981
Insurance
- Affinity
- Affinity Essential
- Affinity Exchange
- Affinity Medicaid
- Affinity Medicare
- Molina
- Molina Exchange
- Molina Medicaid
Ratings & Reviews
4.9 out of 5
178 ratings, 30 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 5/21/2026
Dr. Ackert is a caring and dedicated physician
- 5 out of 5 starsReviewed on 5/21/2026
I have gone to Dr. Ackert for many years - He has provided excellent care and looks at the whole person. He is calm, thorough and relates to me as a person and not "a case."
- 5 out of 5 starsReviewed on 5/20/2026
Perfect
- 5 out of 5 starsReviewed on 5/19/2026
Dr. Ackert is an outstanding doctor. He is very compassionate and always listens to my concerns. He has been taking care of me for over 25 years and I trust him completely.
- 5 out of 5 starsReviewed on 5/9/2026
Listened very well and took time to explain both issues and plan going forward (both Doctor and PA).
- 5 out of 5 starsReviewed on 5/1/2026
Dr. Ackert is caring, considerate and patient. He was wonderful and I felt very confident that I was in good hands.
- 5 out of 5 starsReviewed on 4/30/2026
Dr Gregory Ackert was excellent and gave me best advice and listened to my concerns. Very caring.
- 5 out of 5 starsReviewed on 4/28/2026
My wife and other family members have switched to this practice because of the care I receive.
- 5 out of 5 starsReviewed on 4/23/2026
Dr. Ackert was very thorough and answered all my questions.
- 5 out of 5 starsReviewed on 4/9/2026
Again, very happy and Dr. Ackert was very thorough
- 5 out of 5 starsReviewed on 3/30/2026
Dr.Ackert and PA always listens to my needs!
- 5 out of 5 starsReviewed on 3/12/2026
Always the best
- 5 out of 5 starsReviewed on 2/17/2026
We have the most respect and faith in Dr. Ackert.
- 5 out of 5 starsReviewed on 2/2/2026
Dr. Ackert is OUTSTANDING!
- 5 out of 5 starsReviewed on 1/29/2026
Dr. Ackert is an excellent care provider.
- 5 out of 5 starsReviewed on 1/23/2026
Good
- 5 out of 5 starsReviewed on 1/18/2026
Love Dr. Ackert. Gave me time to ask and answer all my questions.
- 5 out of 5 starsReviewed on 1/15/2026
Excellent bedside manner , very professional and down to earth! Not condescending like some providers are !
- 5 out of 5 starsReviewed on 1/15/2026
I feel that Dr. Ackert listen to my complaints carefully and followed up with specific questions. I feel confident he will help me with my problem.
- 5 out of 5 starsReviewed on 1/8/2026
Dr. Ackert has been providing care for my parents and I for decades and is an example for your younger doctors to emulate. His caring, diligence and thoroughness is unmatched by other providers I have met at CHS.
- 5 out of 5 starsReviewed on 12/31/2025
Dr. Ackert is the best. True compassion in all aspects of care.
- 5 out of 5 starsReviewed on 12/31/2025
Dr. Ackert is an outstanding provider. He is extremely knowledgeable.
- 5 out of 5 starsReviewed on 12/30/2025
Dr. Ackert is a consummate professional and gentleman in how he practices. A 10 out of 10, we need more of him!!
- 5 out of 5 starsReviewed on 12/25/2025
Ive been a patient of Dr. Ackert for decades and plan to for more decades to come. He is soft spoken, respectful and knows everything. A superb doctor.
- 5 out of 5 starsReviewed on 12/23/2025
He's an amazing Dr. He takes his time to talk to his patients and explains things!
- 5 out of 5 starsReviewed on 12/22/2025
Dr. Ackert went over my symptoms and the medication he would prescribe. He advised me on possible side effects, the importance of my diet and exercise.
- 5 out of 5 starsReviewed on 12/18/2025
Dr. Ackert has been my PCP for over 16 years. I am always more than satisfied with the treatment I receive from him and his staff. Dr. Gregory Ackert is the BEST!!!
- 5 out of 5 starsReviewed on 12/17/2025
Dr. Ackert is extraordinarily doctor. He carefully listens to his patients. He gives all the necessary directions. He is the Best by far. I highly recommend him to my family and friends
- 5 out of 5 starsReviewed on 11/30/2025
Dr Ackert is the best! I love him!!! My entire family does!
- 5 out of 5 starsReviewed on 11/28/2025
I have been under Dr Ackert's care for years. He is a talented and experienced professional. You should be happy to have him as part of CHsLI. His staff is amazing. Be glad that you have them as well