Skip to main content
Informational

Your experience at our Optum NY location is important to us:

Need assistance or have concerns? The Optum leadership team is here to help.

Health care

We provide affordable and personalized care

How can we help?

Helpful links

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play
Martin Greenfield, MD

Martin Greenfield, MD

Optum Provider

Specialty

Endocrinology Diabetes & Metabolism

Languages

English

Seeing patients at

Monday 9:00 AM - 5:00 PM
Tuesday 9:00 AM - 5:00 PM
Wednesday 9:00 AM - 5:00 PM
Thursday 9:00 AM - 5:00 PM
Friday 8:00 AM - 4:00 PM
Saturday Closed
Sunday Closed
Please contact the clinic directly to schedule and confirm appointment availability.

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.8

35 reviews

  • Mar 20, 2026
    Verified Review

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

  • 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.

  • Mar 7, 2026
    Verified Review

    He listens to you and checks on your areas of concern

  • 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

  • Mar 3, 2026
    Verified Review

    Warm compassionate and not in rush.

  • 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.

  • Feb 26, 2026
    Verified Review

    Very professional

  • Feb 20, 2026
    Verified Review

    Dr Greenfield is the best compassionate patient physician

  • Feb 20, 2026
    Verified Review

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

  • Feb 12, 2026
    Verified Review

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

  • 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.

  • Jan 26, 2026
    Verified Review

    He seems very knowledgeable about my medical condition and provides advice about any issues I may have.

  • Jan 25, 2026
    Verified Review

    He’s very professional

  • Jan 22, 2026
    Verified Review

    He is thorough, efficient, knowledgeable, friendly, and genuinely concerned about your health.

  • Jan 17, 2026
    Verified Review

    i've been his patient for more than 30 years. He is TERRIFIC - knowledgeable, expert and caring

  • Jan 15, 2026
    Verified Review

    Dr. Greenfield is an excellent diagnostician and understands my medical and personal needs.

  • Jan 6, 2026
    Verified Review

    Dr. Greenfield is an excellent, caring, compassionate doctor.

  • Jan 6, 2026
    Verified Review

    I have been under Dr. Greenfiel‘s care for many years and I am very satisfied. He is very efficient in the clinic and very efficient in returning messages.

  • Jan 5, 2026
    Verified Review

    I know he will be retiring soon

  • Jan 5, 2026
    Verified Review

    Dr. Greenfield is not only knowledgeable, he is also courteous, caring and compassionate. He gives me personal attention.

Page 1 of 2
  • 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 may not reflect all insurance accepted by the provider and is for informational purposes only.

    • 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