What patients are saying
Overall rating
4.77
Average wait time
4.85
Bedside manner
4.72
“My experience with Dr.Marshall was excellent! He explained everything, answered all of my questions and I felt very comfortable at my first visit! 10/10”
Initials hiddenDecember 5, 2025
“Doctor was very friendly and the staff in front were welcoming as well. The wait time was very short I was in and out. Doctor was very knowledgeable and knew what he was doing of course. I felt very comfortable. Highly recommended!”
Kerik P.June 18, 2025
About Dr. Andrew Marshall
Andrew Marshall, MD has 25 years of experience in practice. He is Board Certified in Internal Medicine and Gastroenterology. He graduated from Emory University in 1988, and received his MD from The Mount Sinai School of Medicine in 1992. Dr. Marshall completed his internship residency training in Internal Medicine at The Mount Sinai Hospital in 1995, and then completed a fellowship in Gastroenterology at The Beth Israel Hospital Harvard Medical School in 1997.
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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
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
Diabetic emergency
Upper respiratory Infection (URI)
Insomnia
Atrial fibrillation and atrial flutter
High cholesterol
Chronic high blood pressure
Diabetic emergency
Upper respiratory Infection (URI)
Insomnia
Office location
Optum Medical Care P.C. - 1800 Rockaway Ave, Ste 201
1800 Rockaway Ave, Ste 201, Hewlett, NY 11557
Education and background
Practice names
Board certifications
- American Board of Internal Medicine
- Gastroenterology (American Board of Internal Medicine)
Education and training
- Medical School - Icahn School of Medicine at Mount Sinai, Doctor of Medicine
- The Mount Sinai Hospital, Residency in Internal Medicine
- The Mount Sinai Hospital, Internship in Internal Medicine
- Harvard University, Beth Israel Deaconess Medical Center, Fellowship in Gastroenterology
Languages spoken
- English
Provider's gender
Male
NPI number
1801846290
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.77
Wait time
4.85
Bedside manner
4.72
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
112 reviews
Most relevant
The staff were friendly and welcoming. The office was clean. Dr. Marshall was attentive, patient and thorough.
April 10, 2025Lisa R.Verified patient
Dr was clear and concise very professional and honest. I appreciated the doctor and his staff.
September 3, 2025carlos P.Verified patient
Very, very good doctor and very good office staff. Clean, comfortable, friendly and professional.
June 19, 2025Jacob C.Verified patient
Very professional. Would recommend to people of all backgrounds
February 17, 2026Initials hidden
Great friendly doctor! Switched my PCP right after leaving.
February 18, 2026Jasper R.Verified patient
Very nice doctor, very professional.
Answered and explained every question
I asked.
May 8, 2025Vanessa G.Verified patient
Excellent doctor was great daignosing was good. Friendly and nice person.
November 3, 2024Pir K.Verified patient
He was very nice, I have a few follow up appts scheduled with him.
More than 1 year agoInitials hidden
Office visit was great from check to end of appointment
July 2, 2024Nora O.Verified patient
It was great.
March 6, 2026Rueben U.Verified patient
Best PC I ever met.
December 6, 2025nancy A.Verified patient
My experience with Dr.Marshall was excellent! He explained everything, answered all of my questions and I felt very comfortable at my first visit! 10/10
December 5, 2025Initials hidden
great office , friendly staff
November 13, 2025Initials hidden
…Very professional, and overall good experience.
July 30, 2025Sidney G.Verified patient
I like Dr. Marshall. Highly recommend.
June 18, 2025Irina S.Verified patient
Doctor was very friendly and the staff in front were welcoming as well. The wait time was very short I was in and out. Doctor was very knowledgeable and knew what he was doing of course. I felt very comfortable. Highly recommended!
June 18, 2025Kerik P.Verified patient
So impressed by the manner of how I was treated. After the appointment, i asked him to be my primary. Exceptional experience.
April 19, 2025Michael R.Verified patient
Dr. Marshall is a very soft spoken person and thorough with his instructions and very clear. As to the staff , they are well trained and knowledgeable
April 16, 2025Socorro M.Verified patient
The staff & Dr.Marshall are very nice and informative.. The consultation went fast and after I felt comfortable about the upcoming procedure… thank you
January 16, 2025Keisha L.Verified patient
Doctor was very pleasant and thorough. Office staff was helpful and professional. I will recommend them to family and friends
December 26, 2024Melissa S.Verified patient
The staff is friendly. The doctor was very professional and went over my history. He explained the procedure clearly. Made me feel very comfortable
August 14, 2024Carol B.Verified patient
I gave 1 star but is to much.
This was the second attempt to fo to this doctor.
I made my first appointment for last month. They called me one day before the appointment to cancel and reschedule. They rescheduled for today July 27th at 11:00 am. I got there at 10: 50, and the lady at front desk told me that they try to call me to ask to come earlier because the doctor couldn't wait for 11:00. Of course they had a wrong number.
I am very disappointed
July 27, 2024George D.Verified patient
Dr. Marshall is a consummate professional. The office staff is exceptional. We are lucky to have a practice like his in our area.
June 20, 2024Courtney K.Verified patient
Best Doctor! Great listener I will be going back
June 16, 2024Dahra M.Verified patient
amazing experience would love to go back
February 20, 2024Devante Z.Verified patient
The doc did not do anything for my illness. He did not follow up when I called . Not sue if the office assistants gave him my message. Will not return or recommend this doctor
December 27, 2023Denise P.Verified patient
All Good.
More than 1 year agoBK
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February 5, 2026David S.Verified patient
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November 20, 2025michael L.Verified patient
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September 9, 2025Md A.Verified patient
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September 2, 2025Gregory R.Verified patient
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August 25, 2025Maivish K.Verified patient
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August 19, 2025Shaun B.Verified patient
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May 8, 2025Ramon P.Verified patient
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How soon can I make an appointment with Dr. Andrew Marshall?
Generally, Dr. Andrew Marshall has appointments available on Zocdoc within 1 week. You can see Dr. Marshall's earliest availability on Zocdoc and make an appointment online.
Is Dr. Andrew Marshall accepting new patients?
Dr. Andrew Marshall generally accepts new patients on Zocdoc. You can see Dr. Marshall's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Andrew Marshall accept my insurance?
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Can I make an appointment with Dr. Andrew Marshall online?
Yes, you can make an appointment online with Dr. Marshall using Zocdoc. It’s simple, secure, and free.
What practice does Dr. Andrew Marshall work with?
Dr. Andrew Marshall works with Optum Medical Care, P.C..
Where is Dr. Andrew Marshall's office located?
Dr. Andrew Marshall's office is located at 1800 Rockaway Ave, Hewlett, NY 11557.
Which board certifications does Dr. Andrew Marshall have?
Dr. Andrew Marshall is certified by American Board of Internal Medicine and Gastroenterology (American Board of Internal Medicine).
What are common reasons for patients to see Dr. Andrew Marshall?
Dr. Andrew Marshall frequently sees patients for Annual Physical, Arthritis, Gastroenterology Consultation, Illness, and Sleep Problems. You can see other visit reasons for Dr. Andrew Marshall on their profile.
What languages does Dr. Andrew Marshall speak?
Dr. Andrew Marshall speaks English.
How do patients rate Dr. Andrew Marshall in reviews?
112 patients have reviewed Dr. Andrew Marshall. The overall rating for this doctor is 4.77/5. They have a 4.72/5 rating for bedside manner and a 4.85/5 rating for wait time. You can read individual reviews and ratings on their profile.