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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

4.8

44 reviews

    • 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

    • Reviewed on Mar 20, 2026
    • Verified Review

    The follow up after appointment regarding test results is difficult to get.

    • Reviewed on Mar 14, 2026
    • Verified Review

    Dr. Greenfield has been my endocrinologist for about 30 years. I think that speaks for itself. He is caring, listens, courteous and has given me excellent medical care.

    • Reviewed on Mar 7, 2026
    • Verified Review

    He listens to you and checks on your areas of concern

    • Reviewed on Mar 6, 2026
    • Verified Review

    have been seeing him for over 15 years. very comfortable with him and trust him that he is doing the right thing for me

    • Reviewed on Mar 3, 2026
    • Verified Review

    Warm compassionate and not in rush.

    • Reviewed on Mar 3, 2026
    • Verified Review

    Dr. Greenfield is a very very experienced physician who sees the patient as a whole, and not just the particular organs he specializes in. I have been his patient for over 30 years.

    • Reviewed on Feb 26, 2026
    • Verified Review

    Very professional

    • Reviewed on Feb 20, 2026
    • Verified Review

    Dr Greenfield is the best compassionate patient physician

    • Reviewed on Feb 20, 2026
    • Verified Review

    He's very caring, compassionate, and is a straight shooter.

    • Reviewed on Feb 12, 2026
    • Verified Review

    He is very professional and has a caring bedside manner He knows you abd follows upon anyb issues.

    • Reviewed on Feb 6, 2026
    • Verified Review

    Dr. Greenfield is an excellent doctor. He shows great concern for my condition, orders tests whenever necessary, promptly follows up with me regarding the results, and clearly explains the next steps to be taken.

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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
  • Medical School

    • State University Of New York College Of Medicine

    Residency

    • Long Island Jewish Medical Center