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Dr. Ron Kastner, MD

Dr. Ron Kastner, MD

Internist
1600 Old Country Rd,, Plainview,, NY
5.00
“Dr Kastner was incredibly thorough, friendly, smart, and patient. He is a credit to the medical profession. ”
Michael K.January 9, 2026
Highly recommended
100% of patients gave this doctor 5 stars
New patient appointments
Appointments available for new patients on Zocdoc

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The office partners with Zocdoc to schedule appointments

Scheduling details

  1. See if they are in network

What patients are saying

Overall rating

5.00

Average wait time

4.50

Bedside manner

5.00
“Dr Kastner was incredibly thorough, friendly, smart, and patient. He is a credit to the medical profession. ”
Michael K.January 9, 2026
“Dr. Kastner took the time to gather (as a new patient ) my medical history;, take vital signs, and discuss at length my blood test results, He evaluated me thoroughly for my immediate issue, as well as recommending follow-up diagnostic testing.”
Initials hiddenJanuary 6, 2025

About Dr. Ron Kastner

Ron Kastner, MD is a Board Certified Internist. He graduated from the New York University School of Medicine. Dr. Kastner completed a three-year Internal Medicine residency at Mount Sinai Hospital, New York City after which he joined Island Medical Group.

Is this doctor in your insurance network?

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In-network insurances

99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
Emblem Health
UnitedHealthcare
UnitedHealthcare Oxford
200+ more in-network plans

Areas of expertise

This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Chronic diabetes
Atrial fibrillation and atrial flutter
Acid reflux
High cholesterol
Coronary Artery Disease
Acute urinary tract infection
Chronic diabetes
Atrial fibrillation and atrial flutter
Acid reflux
High cholesterol

Office location

Optum Medical Care, P.C.
1600 Old Country Rd,, Plainview,, NY 11803
Get directions

Education and background

Practice names

Board certifications

  • American Board of Internal Medicine

Education and training

  • Medical School - New York University, Doctor of Medicine
  • Mount Sinai Medical Center (Fellowship)
  • The Mount Sinai Hospital, Residency in Internal Medicine

Languages spoken

  • English

Provider's gender

Male

NPI number

1134200058

Patient reviews

All reviews have been submitted by patients after interacting with the practice.
Overall rating
5.00
Wait time
4.50
Bedside manner
5.00
Trust Banner Shield
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
61 reviews
Most relevant
Dr Kastner was incredibly thorough, friendly, smart, and patient. He is a credit to the medical profession.
Verified patient
Feel very comfortable with Ronnie Kastner He listens & is able to solve health issues
Just starting with the good doctor, but I’ve been very impressed so far. I wish I had found him earlier.
very responsive excellent covers all topics very helpful and caring
Dr. Kastner was very patient and thorough, and the practice was very kind and welcoming.
Verified patient
Great listener and did not feel rushed at all. Highly recommended.
Verified patient
Dr Castner is thorough caring and very professional
Excellent DR
He provides personalized care and treatment.|
Excellent doctor
He is the best doctor
Dr. Kastner took the time to gather (as a new patient ) my medical history;, take vital signs, and discuss at length my blood test results, He evaluated me thoroughly for my immediate issue, as well as recommending follow-up diagnostic testing.
Great guy would go back
Verified patient
This was a new doctor for my family.. He did a exceptional job. The entire visit from the staff to the Doctors was professional and efficient..
Verified patient
Verified patient
Verified patient
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Frequently asked questions

How soon can I make an appointment with Dr. Ron Kastner?

Generally, Dr. Ron Kastner has appointments available on Zocdoc within 1 week. You can see Dr. Kastner's earliest availability on Zocdoc and make an appointment online.

Is Dr. Ron Kastner accepting new patients?

Dr. Ron Kastner generally accepts new patients on Zocdoc. You can see Dr. Kastner's earliest availability on Zocdoc and schedule an appointment online.

Does Dr. Ron Kastner accept my insurance?

Choose your insurance plan to verify if Dr. Kastner is in-network.

Can I make an appointment with Dr. Ron Kastner online?

Yes, you can make an appointment online with Dr. Kastner using Zocdoc. It’s simple, secure, and free.

What practice does Dr. Ron Kastner work with?

Where is Dr. Ron Kastner's office located?

Dr. Ron Kastner's office is located at 1600 Old Country Rd,, Plainview,, NY 11803.

Which board certifications does Dr. Ron Kastner have?

Dr. Ron Kastner is certified by American Board of Internal Medicine.

What are common reasons for patients to see Dr. Ron Kastner?

Dr. Ron Kastner frequently sees patients for Annual Physical, Arthritis, Illness, Physical Therapy Consultation, and Sleep Problems. You can see other visit reasons for Dr. Ron Kastner on their profile.

What languages does Dr. Ron Kastner speak?

Dr. Ron Kastner speaks English.

How do patients rate Dr. Ron Kastner in reviews?

61 patients have reviewed Dr. Ron Kastner. The overall rating for this doctor is 5/5. They have a 5/5 rating for bedside manner and a 4.5/5 rating for wait time. You can read individual reviews and ratings on their profile.

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