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
Ron E. Kastner, MD

Ron E. Kastner, MD

Optum Provider

Specialty

Internal Medicine

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 9:00 AM - 4:30 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

5.0

65 reviews

  • Mar 21, 2026
    Verified Review

    He is a great Dr whom I trust completely

  • Mar 18, 2026
    Verified Review

    Dr. Kastner is a very kind, caring physician. He is very professional and thorough.

  • Mar 13, 2026
    Verified Review

    Makes you feel comfortable at exam. Goes over all test results. Makes recommendations carefully so you can understand

  • Mar 10, 2026
    Verified Review

    He’s the BEST!

  • Mar 5, 2026
    Verified Review

    Great doctor

  • Feb 26, 2026
    Verified Review

    Very caring, thorough, listens, explains

  • Feb 23, 2026
    Verified Review

    Exam not thorough.

  • Jan 24, 2026
    Verified Review

    He is very professional and is concerned about your needs

  • Jan 20, 2026
    Verified Review

    Dr kastner is amazing

  • Jan 19, 2026
    Verified Review

    using him for over 25 years....always listes,not an alarmist about issues i may have.

  • Dec 28, 2025
    Verified Review

    9

  • Dec 21, 2025
    Verified Review

    Very happy with ronnie for decades

  • Dec 20, 2025
    Verified Review

    EFFECIENCY, CURTICY, RESPONSIVE TO THE NEED IN TERM OF APPOINTMENT MEDICATION REFILLS

  • Dec 20, 2025
    Verified Review

    Because he is amazing.

  • Dec 18, 2025
    Verified Review

    Dr Kastner never makes me feel rushed, always takes his time and let me know everything thats going on. Great personality and a straight up nice guy.

  • Dec 14, 2025
    Verified Review

    I have a terrific and trusting relationship with Dr. Kastner

  • Dec 2, 2025
    Verified Review

    I have a good patient/doctor relationship, he listens, and communicates clearly.

  • Dec 1, 2025
    Verified Review

    Great doctor

  • Nov 18, 2025
    Verified Review

    He’s the best

  • Nov 11, 2025
    Verified Review

    He is very conscientious and gives me the proper attention to my medical questions and treatment.

Page 1 of 4
  • About Ron E. Kastner, MD

    Dr. Ron E. Kastner is a board certified internist. He completed medical school at New York University and residency at Mount Sinai Hospital.

    Philosophy of care

    Dr. Kastner provides comprehensive primary care with a focus on continuity and prevention.

    Gender

    Male

    Board certifications

    American Board of Internal Medicine

    Licenses

    NY, 198283

    Employed or contracted

    Employed

    Network Name

    ProHealth

    NPI

    1134200058

  • 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

    • New York University School Of Medicine

    Residency

    • Mount Sinai Medical Center