What patients are saying
Overall rating
4.75
Average wait time
4.55
Bedside manner
4.80
“Very good. Thorough interview of my, my habits and recent health changes. Very thorough evaluation plan and clear explanation of my status and the roadmap ahead. ”
Initials hiddenDecember 3, 2025
“As it was my first visit to the office, I was very pleased with how professional everyone was. Dr. Gidseg was very comforting, professional and didn't make me feel nervous. He is thorough but not alarming which helps a lot.
I would highly recommend this office.”
Cynthia Z.Less than 1 year ago
About Dr. David Gidseg
*PLEASE NOTE: We only see patients ages 15 and older!*
After graduating with distinction from Cornell University in 1999 with a bachelor’s degree, Dr. Gidseg earned his Doctor of Medicine at the university’s New York campus, Weill Medical College, in 2003, graduating Alpha Omega Alpha. He then completed his internship and residency in Internal Medicine at NewYork-Presbyterian Hospital/Weill Cornell Medical Center in 2006, where he served as an assistant chief resident. Dr. Gidseg remained at the same institution for his fellowship in Cardiology, which he completed in 2009, receiving advanced training in nuclear cardiology, echocardiography, and cardiac CT angiography. He is board-certified in internal medicine and currently practices as a member of Suffolk Heart Group with privileges at Southside Hospital of Bay Shore, Good Samaritan Hospital of West Islip, and St. Catherine of Siena Medical Center of Smithtown, New York. Dr. Gidseg has publications in various areas of cardiovascular disease and has presented his research at national meetings.
*Dr. Gidseg is accepting new patients as young as 15 years old. All patients under the age of 18 must be accompanied by a parent or guardian.*
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In-network insurances
99% of patients have successfully booked with these insurances
Aetna
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Cigna
Emblem Health
Medicare
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Areas of expertise
This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Chronic high blood pressure
Heart failure
High cholesterol
Heart valve disorders
Heart block
Intermittent racing heartbeat (PSVT)
Chronic high blood pressure
Heart failure
High cholesterol
Heart valve disorders
Office locations
1 of 2
Education and background
Practice names
Hospital affiliations
- South Shore University Hospital
- Good Samaritan Hospital Medical Center
- Saint Catherine of Siena Medical Center
Board certifications
- American Board of Internal Medicine
- Cardiovascular Disease (American Board of Internal Medicine)
Education and training
- Medical School - Cornell University, New York Campus, Doctor of Medicine
- Cornell University (Bachelor’s)
- NewYork-Presbyterian Hospital / Weill Cornell Medical Center, Residency in Internal Medicine
- NewYork-Presbyterian Hospital / Weill Cornell Medical Center, Fellowship in Cardiology
- NewYork-Presbyterian / Weill Cornell Medical Center (Internship)
Professional memberships
- American College of Physicians
- American College of Cardiology
- American College of Chest Physicians
- American College of Nuclear Medicine
- American Society of Echocardiography
Languages spoken
- English
Provider's gender
Male
NPI number
1225299712
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.75
Wait time
4.55
Bedside manner
4.80
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
239 reviews
Most relevant
Great experience. Dr. Gidseg listened to me well and set up appropriate testing. I would highly recommend this Provider.
May 11, 2022Lisa C.Verified patient
Love the hospitality and the doctor was caring to your problem with eagerness to help correct the problem, by ordered tests.
September 12, 2015Mitchell A.Verified patient
Dr. Gidseg was very ,very compassionate, patient and understanding , despite my perhaps irrational fears and apprehension
October 17, 2014Initials hidden
I was pleasantly surprised how well organized everything was, it was just the first visit but very productive
March 6, 2023Jadwiga K.Verified patient
Dr Gidseg, was friendly, inspiring encouraging and to the point regarding my health. He listens and is attentive.
June 9, 2015Shunda F.Verified patient
Good experience, helpful staff and importantly you did now wait for a long time to be seen by the doctor.
February 8, 2023Eloisa S.Verified patient
Staff is very friendly, helpful, and efficient. Dr. Gidseg was very thorough and addressed all of my concerns.
More than 1 year agoInitials hidden
I have been a patient of Dr. Gidseg for almost five years. He listens, explains things and is very kind.
December 21, 2021Margaret O.Verified patient
I was very pleased with Dr. Gidseg and his enitre staff. Excellent experience from start to finish.
January 25, 2019Philip E.Verified patient
The staff was friendly and kind. I felt comfortable because masks are mandatory in the office.
More than 1 year agoInitials hidden
Amazing office. Got my in last minute and processed me quickly. Great staff. Really blown away.
June 6, 2022Initials hidden
Very smart and professional , sent for multiple preventative tests. So glad I found this doctor.
May 20, 2019John O.Verified patient
Everything was smooth. There was not a lot of waiting time, and the doctor was great.
August 31, 2023Petrona E.Verified patient
Fantastic doc. He was thorough and clear and his staff were charming.
October 17, 2024James S.Verified patient
Very organized office friendly staff. Knowledgeable doctor friendly personality.
?
May 15, 2023Laura P.Verified patient
Very professional & understanding of my situation. Staff was very friendly & efficient.
November 17, 2020Initials hidden
The wait was brief, friendly staff. Very knowledgeable .Excellent experience.
April 24, 2023Francesco R.Verified patient
Doc was very thorough, very easy to understand why he was prescribing what he did.
September 10, 2021Ralph M.Verified patient
I was there for my 6 month follow up. The visit was quick and easy. Short wait time.
July 10, 2015Rodney G.Verified patient
Office is friendly. The doctor is thorough and patient and optimistically cautious!
November 6, 2014Shunda F.Verified patient
Takes his time with you to listen and diagnose. He is thorough and professional.
February 28, 2016Shunda F.Verified patient
Dr. Gidseg has a calm demeanor, which in turn made my concerns easier to handle.
August 4, 2015Janice J.Verified patient
The best office and dr Gidsing is the best doctor and Sedona person
December 3, 2022Beth M.Verified patient
Great doctor. He's patient, listens well and is very knowledgeable.
August 17, 2015Denise Y.Verified patient
Excellent. Doctor is courteous and professional, as is the staff.
February 10, 2015Initials hidden
Excellent doctor. I have been going to him for many years.
June 28, 2022Brian C.Verified patient
Everyone at the Office was very nice and Extremely helpful!
January 21, 2016Angela R.Verified patient
He was very informative and his bedside manner was great.
March 9, 2020Joan T.Verified patient
awesome doctor, pleasant demeanor, neat and clean office
February 25, 2020Glenn S.Verified patient
First time there- the staff was amazing as was the Dr
November 16, 2017Jane C.Verified patient
Very good. Thorough interview of my, my habits and recent health changes. Very thorough evaluation plan and clear explanation of my status and the roadmap ahead.
December 3, 2025Initials hidden
As it was my first visit to the office, I was very pleased with how professional everyone was. Dr. Gidseg was very comforting, professional and didn't make me feel nervous. He is thorough but not alarming which helps a lot.
I would highly recommend this office.
Less than 1 year agoCynthia Z.Verified patient
My experience at the Smithtown Office was great. The desk was courteous and polite and expedited my visit quickly. I did not have a long period to wait before I knew it. I was called in doctor went over the chart made all my appointments with ease. The office was clean. I was well pleased.
March 11, 2025Antoinette R.Verified patient
I was a new patient and I didn’t even know my appointment was done. Didn’t get prescriptions, lab work scripts. Very disappointed.
December 9, 2024Colleen B.Verified patient
All seemed interested in my health
November 21, 2024Ralph M.Verified patient
Great very helpful
More than 1 year agoInitials hidden
Absolutely top notch. Doesn't talk down to patients. Answers questions. I have had appointments with several other doctors in the office, but Gidseg is the best
More than 1 year agoBob R.Verified patient
Great experience!
October 16, 2024George A.Verified patient
What a great Dr! He actually listened to me and addressed my concerns. He was very thorough and his assistant was great as well. Even the office staff was pleasant and helped me with scheduling appointments at a different location. Overall a great experience and I highly recommend Dr. Gidseg
August 30, 2023Melissa S.Verified patient
It was was a very easy online search, all paperwork done online quick apt confirmation. When I arrived at my appointment everything was submitted, I just showed my insurance card and I’d. I was quickly taken in by office staff who was very welcoming and met with Dr. Whom was very nice, knowledgeable and through. Would definitely recommend.
June 27, 2023Dawnmarie G.Verified patient
Everything went very smooth!
April 10, 2023Shokhsanam R.Verified patient
I thought Dr Gidseg was very nice
And
My dear friend recommended him
To me.
He really knew what he was doing.
I was very pleased when I left.
I recommend him highly.
March 24, 2023Ann D.Verified patient
Prompt, Pleasant and Professional
February 28, 2023James S.Verified patient
Very efficiently run office!
February 18, 2023Initials hidden
First time patient. I was glad to get a quick appointment. I booked it the day before. Very kind staff. The doctor had great reviews so I was excited to get in so fast. He moved very quick, didn’t seem to want to answer questions in detail, and didn’t ask many questions. It was a rushed appointment — maybe less than 5 minutes with the doctor — and he just said to get more testing done. Could have been a bad day, but the rushed, joyless demeanor will make me look for a different cardiologist. As a note to the doc: just be mindful that patients, especially first time folks, can be very scared and feeling unwell, beyond what shows up on an initial EKG. I trust that the positive reviews means that it’s uncharacteristic, and will give the benefit of the doubt.
More than 1 year agoInitials hidden
I would recommend this doctor!
January 10, 2023Amy H.Verified patient
I was very satisfied! All around a great experience! Doctor was awesome! Wonderful bedside manner very thorough and patient! Staff is very friendly and helpful! No wait time! Beautiful clean office! Could not ask for more! Very Highly Reccomended!
December 9, 2022Catherine G.Verified patient
being that this was my first meeting with Dr Gidseg I found him to be articulate and made me feel confident with his reccommended treatment ,, and he is going to help me with my condition going forward. Great Dr
October 19, 2022Initials hidden
My first visit w/Dr. Gidseg. I’d already suffered a stroke by the time I met him, so I realize I came in w/a lot of baggage, so to speak. There was a lot of back history for him to review before moving forward in my care; all understood. He listened, reviewed paperwork, and presented a plan of action which I was comfortable. I was seen at my appointment time, but felt like our time together, it was a very short visit. The office is super busy and it’s reflected in the inability to make appointments in what I would think a timely fashion. Waiting 6 weeks for a stress test and then my 2 follow-up appointment, seems excessive. I’m hoping he’s worth the wait.
August 11, 2022Initials hidden
It was very pleasant and the wait time was not bad at all. Dr saw me quickly and was very nice and set up a plan to address my reason for the visit.
May 4, 2022Andrew B.Verified patient
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How soon can I make an appointment with Dr. David Gidseg?
Generally, Dr. David Gidseg has appointments available on Zocdoc within 1 week. You can see Dr. Gidseg's earliest availability on Zocdoc and make an appointment online.
Is Dr. David Gidseg accepting new patients?
Dr. David Gidseg generally accepts new patients on Zocdoc. You can see Dr. Gidseg's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. David Gidseg accept my insurance?
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Yes, you can make an appointment online with Dr. Gidseg using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. David Gidseg affiliated with?
Dr. David Gidseg is affiliated with South Shore University Hospital, Good Samaritan Hospital Medical Center, and Saint Catherine of Siena Medical Center.
What practice does Dr. David Gidseg work with?
Dr. David Gidseg works with Suffolk Heart Group.
Where is Dr. David Gidseg's office located?
Dr. David Gidseg has 2 office locations, including in Bay Shore and Smithtown, view full addresses on Dr. Gidseg's profile.
Which board certifications does Dr. David Gidseg have?
Dr. David Gidseg is certified by American Board of Internal Medicine and Cardiovascular Disease (American Board of Internal Medicine).
What are common reasons for patients to see Dr. David Gidseg?
Dr. David Gidseg frequently sees patients for Cardiology Consultation , Cardiology Follow Up , Chest Pain, High Blood Pressure / Hypertension, and New Patient Visit. You can see other visit reasons for Dr. David Gidseg on their profile.
What languages does Dr. David Gidseg speak?
Dr. David Gidseg speaks English.
How do patients rate Dr. David Gidseg in reviews?
239 patients have reviewed Dr. David Gidseg. The overall rating for this doctor is 4.75/5. They have a 4.8/5 rating for bedside manner and a 4.55/5 rating for wait time. You can read individual reviews and ratings on their profile.