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Martin Greenfield, MD

Martin Greenfield, MD

Optum Provider

Specialty

Endocrinology Diabetes & Metabolism

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.9

55 reviews

    • Reviewed on Jun 30, 2026
    • Verified Review

    Greta doctor. He made it easy to understand what was going on.

    • Reviewed on Jun 26, 2026
    • Verified Review

    He is welcoming,thorough, respectful, answers questions and provides needed information; kind and approachable; has managed my care for many years;

    • Reviewed on Jun 25, 2026
    • Verified Review

    Very caring and thorough

    • Reviewed on Jun 24, 2026
    • Verified Review

    My husband and I both use Dr. Greenfield. I feel he is a Very good and caring Dr.

    • Reviewed on Jun 19, 2026
    • Verified Review

    He’s very knowledgeable and always goes over things with detail.

    • Reviewed on Jun 19, 2026
    • Verified Review

    Martin Greenfield is an outstanding endocrinologist. He is up with the latest developments in diabetes care.

    • Reviewed on Jun 16, 2026
    • Verified Review

    He is very knowledgeable and explains any questions. He is respectful and a very pleasant doctor Great bedside manner

    • Reviewed on Jun 14, 2026
    • Verified Review

    Level of professionalism

    • Reviewed on Jun 6, 2026
    • Verified Review

    Dr. Greenfield has been my doctor for over 35 years and has always provided excellent healthcare.

    • Reviewed on Jun 5, 2026
    • Verified Review

    Dr. Greenfield is a kind, caring and knowledgeable physician. I value his opinion, always.

    • Reviewed on Jun 3, 2026
    • Verified Review

    Fantastic Doctor

    • Reviewed on May 26, 2026
    • Verified Review

    He is extremely knowledgable & caring. Dr. Greenfield did not rush and listened carefully.

    • Reviewed on May 22, 2026
    • Verified Review

    Dr Greenfield is just great. I feel very comfortable when I am in for a check up.

    • Reviewed on May 11, 2026
    • Verified Review

    He’s a great doctor, I highly recommend him.

    • Reviewed on May 8, 2026
    • Verified Review

    exc Dr

    • Reviewed on May 5, 2026
    • Verified Review

    He seemed knowledgeable , til I get the biopsy done I will then give a tating

    • Reviewed on May 5, 2026
    • Verified Review

    Dr. Greenfield is very caring about my needs. I just recommended someone recently

    • Reviewed on May 3, 2026
    • Verified Review

    I find him to be caring, compassionate, knowledgeable about my endocrine systems, smart about medications, and genuinely interested in my well being.

    • Reviewed on Apr 27, 2026
    • Verified Review

    The care I received

    • Reviewed on Apr 15, 2026
    • Verified Review

    Dr. Greenfield is excellent and very knowledgeable. So kind

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  • About Martin Greenfield, MD

    Dr. Martin Greenfield is board certified in internal medicine and endocrinology. He manages a wide range of endocrine conditions with a strong focus on diabetes care and leadership in organized medicine.

    Philosophy of care

    Dr. Greenfield partners with patients through education and long-term disease management.

    Gender

    Male

    Board certifications

    American Board of Internal Medicine

    Licenses

    NY, 103688

    Employed or contracted

    Employed

    Network Name

    ProHealth

    NPI

    1205831443

  • Insurance Accepted

    This list is for informational purposes only and may not reflect the most current plans accepted by the provider. Optum accepts most major health insurance plans. Please contact your insurance company to confirm your coverage, eligibility, and the provider's participation in your plan.

    • 1199
    • Aetna
    • Affinity
    • Anthem BCBS
    • CHN
    • Centivo
    • Cigna
    • Coventry
    • EmblemHealth
    • First Health
    • Humana
    • MagnaCare
    • Medicaid
    • Medicare
    • MultiPlan
    • NYSHIP
    • Northwell Direct
    • Oscar
    • Oxford
    • TRICARE
    • UHC
    • UMR
  • Education

    Medical School

    • State University Of New York College Of Medicine

    Residency

    • Long Island Jewish Medical Center