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Gregory Mark Ackert

Gregory Mark Ackert, MD

4.9107 ratings, 16 reviews

Gastroenterology

Catholic Health Physician Partners
Accepting New Patients
Need help scheduling? Call 516-775-4545

Highlights

Languages

  • English

Gender

Male

About Gregory Mark Ackert

Gregory Ackert, MD, completed his Internal Medicine residency at Long Island Jewish Medical Center in 1981 and his Gastroenterology Fellowship there in 1983. He served as Chief Resident in 1984. Dr. Ackert is dedicated to comprehensive digestive health care and is an active member of several leading medical associations.

Locations

  1. Gastroenterology, Ambulatory Care at Lake Success
  2. Endoscopy, Ambulatory Care at Lake Success

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

Search plans
  • Aetna
  • Aetna Medicare PPO
  • American Plan Administrators PPO
  • Anthem
  • Anthem Child Health Plus
  • Anthem Essential Plan 1 & 2
  • Anthem Essential Plan 3 & 4
  • Anthem Medicaid and Individual
  • Anthem Medicare
  • Blue Cross Mcd Hmo
  • Blue Cross Medicaid
  • Centers Plan For Health Living
  • Centers Plan For Healthy Living
  • Cigna
  • Cigna Medicare
  • Coventry Health Care
  • Elderplan
  • Elderplan Medicaid
  • Emblem
  • Emblem HIP
  • Emblem Medicaid
  • Emblem Medicare
  • Fidelis
  • Fidelis Health Exchange
  • Fidelis Medicaid
  • Fidelis Medicare
  • First Health
  • GHI
  • GHI CBP NY City Employee
  • GHI CBP PPO EPO
  • GHI HMO
  • GHI Medicare Choice PPO/Value Options
  • GHI NYS NYC Value Options
  • GHI PPO EPO
  • HCP Child Health Plus
  • Health First
  • HEALTH FIRST EP 3&4
  • Health First Medicaid
  • Health First Medicaid HARP EP 3&4
  • Health First Medicare
  • HEALTH FIRST RISK EP 3&4 ALT
  • Health First Risk Medicaid HARP EP 3&4 Alternate Plan
  • Healthsmart Benefit Solutions
  • HIP
  • HIP Child Health Plus
  • HIP Hcare Partners Essent Pl 1&2
  • HIP Hcare Partners Essential 3&4
  • HIP Hcare Partners HMO
  • HIP Hcare Partners Medicaid
  • HIP Hcare Partners Medicare HMO
  • HIP Hlth Essential Pl 1 & 2
  • HIP Hlth Essential Pl 3&4
  • HIP HMO POS
  • HIP Medicaid
  • HIP Medicare HMO
  • HIP Medicare PPO
  • HIP NY City HMO
  • HIP PPO EPO
  • HIP Somos Child Health Plus
  • HIP Somos Essential Plan 1&2
  • HIP Somos Essential Plan 3&4
  • HIP Somos Medicaid/HARP
  • Humana
  • Humana Medicare
  • Local
  • Local 1 Bricklayers Magnacare
  • Local 1102 Magna
  • Local 1199 Emp SJH SEIU
  • Local 1199 National Benefit Fund
  • Local 1205
  • Local 1298 Magna
  • Local 138 Operating Engineers Magna
  • Local 1500
  • Local 1964
  • Local 210 Retiree Grp Magna
  • Local 210 Unity Welfare Fund
  • Local 25 Ibew Magna
  • Local 272 Welfare Fund Magna
  • Local 29 Blasters & Drillers & Minors
  • Local 3 Magna
  • Local 30 Trust Fund Engineers Magna
  • Local 338 Magna
  • Local 342 50 Magna
  • Local 342 Insurance Trust Magna
  • Local 361 Magna Care
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  • Local 40 Iron Workers
  • Local 463 Health Fund
  • Local 522
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  • Local 6A Cement And Concrete
  • Local 802 Musicians
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  • Local 888 Magna
  • Magna Direct Plus
  • Magna Preferred PPO
  • Medicaid
  • Medicaid Out Of State
  • Medicare
  • Medicare Railroad
  • Meritain Health
  • Meritain Health Aetna PPO
  • Optum Health/Blue Cross
  • Oscar
  • Oscar Health Exchange
  • Other Medicaid
  • Other Medicare
  • Oxford
  • Oxford Bh
  • Oxford Medicare
  • Partners Health Plan
  • Partners Health Plan Medicare
  • Secure Horizon Mcr Complete PPO
  • Three Rivers
  • Three Rivers Provider Network
  • UMR
  • UMR UHC Salt Lake City
  • United HC Choice Plus POS
  • United HC Community Child Health Plus
  • United HC Community Medicaid
  • United HC Essential Pl 1 & 2
  • United HC Essential Pl 3&4
  • United HC Exchange
  • United HC HMO POS
  • United HC Medicare HMO
  • United HC Medicare PPO
  • United HC Narrow Network
  • United Hc Nexus ACO R
  • United HC NexusACO OA
  • United HC PPO
  • United HC PPO Empire Plan
  • United HC PPO EPO Indemnity
  • United HC Speech
  • United Health Plus PPO
  • United Healthcare
  • United Healthcare Medicaid
  • United Healthcare Medicare
  • United Healthcare Mpn
  • VNS Choice
  • Vns Choice Medicare Replacement
  • Wellcare
  • Wellcare Medicaid
  • Wellcare Medicare

Ratings & Reviews

4.9 out of 5

107 ratings, 16 reviews

The 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.

Provider showed concern
Provider explained things clearly
Provider included you in decisions
Provider discussed treatment options
Likelihood of recommending this provider
Search reviews
    5 out of 5 stars
    Reviewed on 1/29/2026

    Dr. Ackert is an excellent care provider.

    5 out of 5 stars
    Reviewed on 1/23/2026

    Good

    5 out of 5 stars
    Reviewed on 1/18/2026

    Love Dr. Ackert. Gave me time to ask and answer all my questions.

    5 out of 5 stars
    Reviewed on 1/15/2026

    Excellent bedside manner , very professional and down to earth! Not condescending like some providers are !

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 12/31/2025

    Dr. Ackert is the best. True compassion in all aspects of care.

    5 out of 5 stars
    Reviewed on 12/31/2025

    Dr. Ackert is an outstanding provider. He is extremely knowledgeable.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 11/30/2025

    Dr Ackert is the best! I love him!!! My entire family does!

    5 out of 5 stars
    Reviewed 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