Summary

Dr. Gregory Ackert is a gastroenterologist and internal medicine specialist with nearly five decades of medical experience. He earned his medical degree from New York University School of Medicine and completed his residency at Long Island Jewish Medical Center. Dr. Ackert brings 48 years of clinical expertise to his practice and is fluent in both English and Spanish.

Dr. Ackert maintains hospital affiliations with Long Island Jewish Medical Center, Staten Island University Hospital, Staten Island University Hospital South, Northwell Health Hospital, and Katz Women's Hospital at Long Island Jewish Medical Center, with his primary practice location in New Hyde Park, New York. His clinical focus includes treating high cholesterol in children and teens, hyperlipidemia, and familial lipid disorders. He performs diagnostic procedures such as electrocardiograms, colonoscopies, and lower gastrointestinal endoscopy. Patients rate Dr. Ackert 4.3 out of 5 stars on average.

Overview based on verified provider data

Quick Facts

  • 4.3
  • 48 years of experience
  • speaks English, Spanish
  • Li Jewish Medical Center
  • 3 written reviews
  • 2 specialties
  • 11 areas of expertise
  • 2 board certifications
  • 5 hospital affiliations
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Location

Long Island Jewish Medical Center

27005 76th AveNew Hyde Park, NY 11040

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Dr. Gregory Mark Ackert, MDDr. Ghassan Philip Sayegh, DODr. Divya Mallam, MDDr. Michael Schopis, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
4.3 
48 Years of Experience 16 Years of Experience 9 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available Virtual Visit Available
Speaks English, Spanish Speaks English Speaks English Speaks English
New Hyde Park , NYYonkers , NYNew York , NYNew York , NY
Med School: New York University School Of Medicine Med School: Osteopathic Medical Degree from New York Institute of Technology College of Osteopathic Medicine. Med School: State University of New York (SUNY) Downstate Health Sciences University College of Medicine Med School: University Of Toledo College Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Gregory Mark Ackert

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Gregory Mark Ackert has the following 2 specialties

Specialty Expertise

Dr. Gregory Mark Ackert has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

48 Years Experience

Dr. Gregory Mark Ackert holds an expired medical license in the state of New York.

Medical License

Medical Doctor with an expired medical license in the state of New York that expired in 2026.

Education & Training

Residency

Completed their residency at Li Jewish Medical Center.

Medical School

Graduated from New York University School Of Medicine in 1978.

NPI Number

Dr. Ackert's NPI number is 1417991803.

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Frequently Asked Questions

Is Dr. Gregory Ackert accepting new patients?
Dr. Gregory Ackert has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Gregory Ackert?
You can find contact information for Dr. Gregory Ackert here on Vitals.
Does Dr. Gregory Ackert accept my insurance?
You can see the insurance plans that Dr. Gregory Ackert accepts on their Vitals profile.
Which hospitals is Dr. Gregory Ackert affiliated with?
Dr. Gregory Ackert is affiliated with Long Island Jewish Medical Center, Staten Island University Hospital, Staten Island University Hospital South, NORTHWELL HEALTH HOSPITAL, and Katz Womens Hospital At Long Island Jewish Medical Center.
What languages does Dr. Gregory Ackert speak?
Dr. Gregory Ackert speaks English and Spanish.

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