Dr. Thomas O'Brien II, DO

Dr. Thomas O'Brien II, DO

Family Physician
1700 Flatbush Ave, Brooklyn, NY
4.83
“Accommodating office hours that better suit working people. A friendly, down to earth staff who are polite, and considerate. Dr. O'Brien is a very caring, knowledgeable person, and he always treats his patients like they're members of his extended family. ”
Jennifer A.September 23, 2025
Highly recommended
91% of patients gave this doctor 5 stars
Excellent wait time
99% of patients waited less than 30 minutes

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Available appointments

Today, Apr 2 – Wed, Apr 15
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What patients are saying

Overall rating

4.83

Average wait time

4.89

Bedside manner

4.92
“Accommodating office hours that better suit working people. A friendly, down to earth staff who are polite, and considerate. Dr. O'Brien is a very caring, knowledgeable person, and he always treats his patients like they're members of his extended family. ”
Jennifer A.September 23, 2025
“Hardly any wait time. The Dr is very focused on holistic health and educating patients on nutrition and healthy living. He explained things clearly and allowed time for questions.”
Tiffany S.Less than 1 year ago

About Dr. Thomas O'Brien II

Dr. Tommy O has a Doctor of Osteopathic Medicine Degree from the University of Osteopathic Medicine and Health Sciences, a Masters Degree in Clinical Nutrition from the New York Institute of Technology, and completed his Family Medicine Residency at St. Barnabas Hospital, Bronx, New York. Dr. Tommy O spent the first sixteen years of his career practicing Primary Care in an underserved community located in the South Bronx. He then opened a private practice on the Upper East Side of Manhattan. Dr. Tommy O has devoted his life to not just treating his patients but educating them so they can improve their lifestyle through healthier choices. Through the use of medication, hands-on manipulation, and education, he is able to treat each patient as an individual and tailor a protocol that will best resolve any medical issue. Dr. Tommy O is known for his ability to explain complex medical problems in simple terms so that every patient can understand and help control their well-being. More than a medical practitioner, Dr. Tommy O is an author with two certified number 1 Amazon Best sellers, as well as a public servant who has devoted much time and effort to enriching communities across New York City.

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In-network insurances

99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
Emblem Health
Medicare
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.
Upper respiratory Infection (URI)
Upper respiratory Infection (URI)

Other popular visit reasons

Abdominal Aortic Aneurysm (AAA) Screening
Abdominal Cramps
Abdominal Pain
Annual Physical
Chiropractic Consultation
ENT Consultation
Foot Consultation
Illness
Abdominal Aortic Aneurysm (AAA) Screening
Abdominal Cramps
Abdominal Pain
Annual Physical

Office locations

Dr. Thomas O'Brien II, DO also offers online video visits for patients
Thomas G. O'Brien II MS. DO. PC (1 of 3)
1700 Flatbush Ave, Brooklyn, NY 11372
Thomas G. O'Brien II MS. DO. PC (2 of 3)
86-10 Roosevelt Ave, Ste 2A, Jackson Heights, NY 11373
Thomas G. O'Brien II MS. DO. PC (3 of 3)
1700 Flatbush Ave, Brooklyn, NY 11372
1 of 3

Education and background

Practice names

Hospital affiliations

  • North Shore University Hospital

Education and training

  • Medical School - Des Moines University, Doctor of Osteopathic Medicine
  • St. Barnabas Hospital, Residency in Family Medicine
  • New York Institute of Technology, New York College of Osteopathic Medicine, Master's in Clinical Nutrition

Professional memberships

  • International Society of Police Surgeons
  • Federal Emergency Management Agency

Awards and publications

  • Beta Award for Best TV Series
  • Beta Award for Best Health Program x 3
  • Beta Award for Best Educational Program

Languages spoken

  • English

Provider's gender

Male

NPI number

1063434298

Patient reviews

All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.83
Wait time
4.89
Bedside manner
4.92
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651 reviews
Most relevant
It was Great! Dr. O’Brien was very helpful and knowledgeable. Everything exceeded expectations. Would definitely recommend.
Dr. O'Brien was so friendly and did a great job of explaining my diagnosis. He really took his time with me.
Verified patient
I was treated very well. Office people were great. Dr, O'Brien is very knowledgeable, respectful and patient.
Verified patient
Great doctor, takes time to listen and I like that I did some testes in the clinic. The staff is welcoming, great location.
Verified patient
The doctor was excellent, completely fixed my issue within minutes. Great bedside manner and genuine cool guy.
Verified patient
Great Doctor. He really listens to your needs and communicates to you clearly on what’s best for your current health needs
Verified patient
Excelente atención, me atendieron enseguida y me hizo muy bien el tratamiento que me mandó.
Verified patient
Dr. Thomas is very kind. The assistants there are also very kind and warm that reduce my anxiety. A very good experience.
Verified patient
Best doctor I have ever seen. Extensive medical exams which go above and beyond what a normal physical is.
Verified patient
Amazing bed side manner. Patient and understanding. Very thorough and empathic. I felt relief when I was done.
Verified patient
Great doctor , awesome personality and bedside manner, the office workers were also very friendly
Verified patient
The doctor was very easy to talk to. We established a quick rapport. Staff was helpful and friendly. I will go back.
Verified patient
Dr. Thomas O'Brien II is very professional, great communicator, listen the patients. Was very pleasure to be there.
Verified patient
Great & speedy service. Doc was great to talk to and was knowledgeable of my concerns. Would definitely recommend
It was a lovely experience. He was friendly and helpful. Staff were great. Will definitely recommend!
Verified patient
El personal es amable te atiende con respecto esta todo limpio y sobre todo el personal habla tu idioma gracias
Verified patient
Great bedside manner, doctor was very understanding and knowledgeable about my issue and was a a great help.
Verified patient
I would recommend the doctor to anyone searching for Primary Care physician around this part of Queens, NY.
Dr O'Brien and his staff are very professionals and friendly. I highly recommend Dr. O'Brien office.
Verified patient
A friendly and boisterous doctor. Was straight to the point and enthusiastic in his want to help.
Verified patient
Great bedside manner, the doctor was very informative and help me with my issue. Would highly recommend.
Verified patient
Very personable, relatable, friendly. Knows what he’s talking about, gives you clear answers.
Really humorous Dr also great listener, got the prescription I’ve needed my whole life! Highly recommend.
Verified patient
Great first appointment. Dr, O’Brien gave me full attention and worked with me on my diagnosis.
Wonderful visit. Listening ear, extremely helpful and very friendly. Highly recommend! Thank you.
Verified patient
Great interaction with Dr Tommy O. Answered all my questions and will be coming back for a follow up
Verified patient
Wonderful experience very friendly and able to address all my questions and concerns! I will be back for sure!
Verified patient
Overall a great experience, the doctor was kind and enthusiastic about his work.
Verified patient
Very informative and friendly. Took time to explain everything which was great. Highly recommend Dr. O'Brien.
I like Dr Thomas O’Brien, already recommended someone. He will be my PCP.
Verified patient
Very good and professional. For immediate consultation, he's the right doctor
Verified patient
Thank you Dr O'Brian and your great staff. This community is lucky to have you.
Verified patient
Very kind. Very thorough. Very knowledgeable. 5 star service. I'll be back!!!??????
Verified patient
Always a great pleasure dealing with Dr . O' Brien and his staff.
Verified patient
Very friendly staff and helpful and responsive doctor.
Verified patient
The appointment exceeded my expectations. The whole experience was 5 stars.
Verified patient
I went into there with a 2 week severe back pain. I got out without any pain.
Verified patient
I highly recommend this doctor, he is very knowledgeable and has great bedside manners.
Great doctor and work staff, the environment as a whole.
Verified patient
Very comfortable and informative Yes would recommend a friend or relative
Verified patient
The doctor was knowledgeable and had a good bedside manner. The staff was friendly.
Verified patient
Great bedside manners We felt relax and comfortable while we wait.
Verified patient
First visit went really well, I felt super comfortable
Dr. Thomas is very nice, very clear with explainations ??
Verified patient
The doctor is great the staffs are friendly and waiting is not much.
Dr. Was very kind and very professional. I'll come back.
One of the clearest /informative doctor’s visits I’ve experienced.
Verified patient
Nice people, they try to relate to you and share stories which is nice
Dr.O’Brian is so personable and I am happy to have him as my PCP!
Verified patient
An all around doctor who will listen to you and explain clearly what can be done.
Verified patient
Frequently asked questions

How soon can I make an appointment with Dr. Thomas O'Brien II?

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

Is Dr. Thomas O'Brien II accepting new patients?

Dr. Thomas O'Brien II generally accepts new patients on Zocdoc. You can see Dr. O'Brien II's earliest availability on Zocdoc and schedule an appointment online.

Does Dr. Thomas O'Brien II accept my insurance?

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Which hospital is Dr. Thomas O'Brien II affiliated with?

Dr. Thomas O'Brien II is affiliated with North Shore University Hospital.

What practice does Dr. Thomas O'Brien II work with?

Where is Dr. Thomas O'Brien II's office located?

Dr. Thomas O'Brien II has 4 office locations, including in Brooklyn, Jackson Heights, and Smyrna, view full addresses on Dr. O'Brien II's profile.

What are common reasons for patients to see Dr. Thomas O'Brien II?

Dr. Thomas O'Brien II frequently sees patients for Annual Physical, Chiropractic Consultation, ENT Consultation, Foot Consultation, and Illness. You can see other visit reasons for Dr. Thomas O'Brien II on their profile.

What languages does Dr. Thomas O'Brien II speak?

Dr. Thomas O'Brien II speaks English.

How do patients rate Dr. Thomas O'Brien II in reviews?

651 patients have reviewed Dr. Thomas O'Brien II. The overall rating for this doctor is 4.83/5. They have a 4.92/5 rating for bedside manner and a 4.89/5 rating for wait time. You can read individual reviews and ratings on their profile.

ZocdocBrooklyn, NY Family PhysiciansDr. Thomas O'Brien II, DO