Credentials

Credentials

  • Board certifications

    • Family Medicine - American Board of Family Medicine/Hospital Med

  • Medical school

    • State University of New York at Buffalo (Medicine)

  • Residencies

    • State University of New York (SUNY) at Stony Brook

  • Affiliations

    • Huntington Hospital

Locations & insurance

Locations & insurance

3001 Expressway Drive North, 102Islandia, NY 11749

Insurance information

Don't be surprised

Learn how you can avoid unanticipated medical bills

Learn more about medical bills

Patient ratings & comments

Patient ratings & comments

Unlike websites where anyone can post doctor reviews, only actual patients can provide information by completing the survey sent to them by Press Ganey. Learn more.

4.9 out of 5 4.9 out of 5 rating
| 344.0 patient ratings & 121 patient comments

Friendliness/courtesy of the care provider

5.0 out of 5 5.0 out of 5 rating

Explanations the care provider gave you about your problem or condition

4.9 out of 5 4.9 out of 5 rating

Concern the care provider showed for your questions or worries

4.9 out of 5 4.9 out of 5 rating

Care provider's efforts to include you in decisions about your treatment

4.9 out of 5 4.9 out of 5 rating

Information the care provider gave you about medications(if any)

4.9 out of 5 4.9 out of 5 rating

Instructions the care provider gave you about follow up care (if any)

4.9 out of 5 4.9 out of 5 rating

Degrees to which care provider talked with you using words you could understand

5.0 out of 5 5.0 out of 5 rating

Amount of time the care provider spent with you

4.9 out of 5 4.9 out of 5 rating

Your confidence in this care provider

4.9 out of 5 4.9 out of 5 rating

Likelihood of your recommending this care provider to others

4.9 out of 5 4.9 out of 5 rating

Most recent comments

Patient comments are gathered from the Press Ganey Pateint Satisfaction Survey. Comments are displayed in their entirety and are anonymous for patient privacy.

09/12/2018
"Dr. O'Brien is by far the best Primary Care Dr. I have ever had!!"
09/10/2018
"excellent"
08/29/2018
"Actual rating experience - excellent/outstanding for all categories."
08/25/2018
"Dr. O'Brien is caring and always explains all relevant items clearly and concisely. She will spend whatever time that is necessary on any given appointment. She is friendly and very approachable, listening carefully to you and allowing you to state your issues."
08/23/2018
"Dr. O'Brien is as good as it gets. I will not trust my health to anyone else. She has the ability to ease all worries and provide expert advice with care and compassion."
08/22/2018
"This dr. is always there for me when I need her."
08/13/2018
"Very nice and answered all my questions."
08/13/2018
"Dr. O'Brien is by far the best doctor I have ever had the pleasure of calling "My Doctor". She's the BEST."
08/07/2018
"I have already recommended Dr. O'Brien to many people. she is a wonderful Doctor."
07/27/2018
"Dr O'Brien is one of the best and I hope to have her as my primary physician for life."
07/24/2018
"Dr. O'Brien is plain and simple, excellent. Listens well, provides helpful information, and makes excellent decisions on recommended follow up care. Highly trusted and recommended."
07/18/2018
"Dr. O'Brien is always happy and takes time with you. You never feel rushed and she take the time to speak with you about any concerns - The best."
07/17/2018
"Dr. O'Brien is amazing!"
07/17/2018
"Excellent doctor. "
07/16/2018
"Dr. O'Brien shows respect for my time and is comprehensive in her questioning and treatment options. the staff went out of there way to accommodate me and my time."
07/16/2018
"There is no one like Dr. O'Brien her care, kindness, understanding, communication skill, compassion and helpfulness are priceless!"
07/16/2018
"Dr O'Brien is consistently thorough whenever I see her. She takes the time to review anything new or new concerns since I last saw her. Dr O'Brien always makes me feel comfortable and explains everything."
07/11/2018
"she is very caring and knows my health issues and concerns. I always leave there knowing I am in good hands."
07/07/2018
"Dr Obrien is very helpful and answered all my questions."
06/19/2018
"I have recommended dr. O'brien to my friend"
06/07/2018
"Dr O'Brien is very busy, I'm selfish enough not to share her"
05/30/2018
"Our family is blessed to have Dr. O'Brien as our physician. She is caring and a remarkable professional. We cannot thank her enough for her excellent care!"
05/30/2018
"I find Dr. O'Brien to be a terrific health care provider. I trust her, have referred others to her and will continue to do so."
05/29/2018
"Dr. O'Brien and staff are always above and beyond phenomenal, caring, and empathetic."
05/24/2018
"O'Brien is good doctor."
05/18/2018
"Could not say more than superlative."
05/03/2018
"Dr. O'Brien is a magnificent dr. She's incredibly smart & listens completely. She's compassionate & very straight to the point. By far the best dr. I've ever been to."
05/01/2018
"Dr. Kristen O'Brien has virtually saved my life twice. She thinks outside the box and has found serious conditions overlooked or misdiagnosed by specialists. On a scale of 1-5, she's 100. 1. Actually at least a "10." "
05/01/2018
"I have already recommended Dr. O to others"
04/23/2018
"She is the best doctor I have been to. I followed her here from the last practice and won't trust anyone else at this point!"
04/17/2018
"Excellent. "
04/16/2018
"I have complete confidence in Dr. O'brien"
03/29/2018
"I tell everyone I have an amazing Dr. & when she has needed to refer me out the Northwell doctors she has recommended have all been tops!"
03/27/2018
"Dr. O'Brien a lovely caring person takes time to answer questions. Very helpful with everything."
02/12/2018
"Dr Obrien consistently elicited my input in all discussions"
02/06/2018
"I have already recommended Dr. O'Brien to numerous people."
02/05/2018
"Dr O'Brien is am amazing professional. She is truly a great doctor and as a nurse for 35 years, I can say she is one of the best family practitioners around."
01/23/2018
"Dr. O'Brien is professional,compassionate & understands."
01/15/2018
"Dr. O'Brien was amazing. Just the perfect balance of tough love and compassion."
12/29/2017
"Dr. O'Brien is AMAZING! Very knowledgeable and listens totally to my concerns. She offers excellent advice when asked for her "opinion" of a situation."
12/21/2017
"1. Makes me feel at ease."
11/25/2017
"Dr Obrien is an exceptional doctor, I am extremely satisfied with my care."
11/21/2017
"Dr. o'brein is wonderful!"
11/20/2017
"I have already referred Dr O'Brien to others."
11/18/2017
"have recommended to all my family who now use her"
11/13/2017
"Dr. O'Brien shows me respect and speaks to me in a way that I can understand. She does not rush in and out of the examination room but takes the time to make sure all my questions are answered and seems to really care about me. She is very personable and very professional and makes me feel very confident in her ability as a doctor."
11/05/2017
"Dr. O'Brien is friendly, compassionate, professional and I am very confident in her abilities as my doctor. I only wish she had more diverse hours, such as some evening or weekend hours."
10/27/2017
"Dr. K. O'Brien is dedicated, caring & friendly physician."
10/18/2017
"Dr O'brien is always courteous, professional, knowledgeable and approachable. I have recommended and will continue to refer patients to her."
10/06/2017
"I'm recommending my Doctor to my husband."
09/30/2017
"Dr.OBrien is very personable and concerned about my well-being."
09/30/2017
"Dr. O'Brien was very effective in obtaining my input for the treatment plan!"
09/30/2017
"I am extremely impressed with dr o'brien"
09/19/2017
"I have already recommended her."
09/07/2017
"Dr. O'Brien was wonderful. She was very thorough and took the time to listen to all of my concerns. "
09/05/2017
"Dr. O'Brien has made a huge impact on my life & well being. She is the only doctor that I went to who recommended a colon rectal surgeon to treat my diverticulitis. I had the surgery and feeling so much better. Was able to leave hospital early and my condition is now resolved. THANK YOU DOC!!! "
09/05/2017
"I had allergy problems and they were fixed with the _____ she gave me."
07/31/2017
"Very comfortable with talking about my health problems with Dr. O'Brien"
07/25/2017
"Kristen O'Brien is an excellent doctor and a very caring & concerned individual."
07/24/2017
"Dr K O'Brien is an excellent caring care giver, physician. Best physician I have ever had!"
07/24/2017
"Dr O'brien was wonderful, In fact, I will be switching to her as my primary care physician"
07/20/2017
"Dr. O'Brien REALLY listens to my concerns -"
07/17/2017
"Wonderful doctor and someone that Northwell should look for in all their doctors"
06/23/2017
"Very pleasant. "
06/13/2017
"there was not enough time allotted for my visit"
06/13/2017
"Dr. O'Brien and her office staff make attending to your medical care and concerns a "pleasant" and reassuring experience EVERY VISIT!"
06/04/2017
"Dr. O'Brien is a good doctor and takes time to explain everything clearly and always cheerful."
05/27/2017
"she is a well informed and caring doctor in whom I trust with my health care"
05/24/2017
"#1. Dr. Kristen O'Brien MD"
05/23/2017
"She is an excellent doctor. I'm not used to receiving such excellent care."
05/22/2017
"Care provider always answers question and has general concern for me."
05/18/2017
"This was my first visit to Dr. O'Brien as I decided to see her after having a different provider for many years."
05/08/2017
"Dr O'Brien is the best! She always treats me with respect and is down to earth. I am always confident in her care!"
05/03/2017
"I have already recommend this practice to 2 other friends."
04/17/2017
"Dr. O'Brien takes care of me as if I were her own family for over ten years now... maybe fifteen."
03/27/2017
"Dr. O'Brian is BY FAR The best Primary Care Doc. I've ever had. She always takes time to discuss issues & answer ALL my questions & concerns."
03/06/2017
"Going back to a previous question...the doctor's office does not call me to give me results of my blood work. I make an appoint the week after I have the blood work done so the doctor and I can go over it together. We also compare the latest results to the previous results."
02/28/2017
"Dr. O'Brien has been my doctor for 11 years. She is fantastic. I am so happy she is in my insurance network."
02/25/2017
"never in my 62 years have I ever experienced a provider as prepared, knowledgeable about my health, caring, and concerned about me. dr obrien spends as much time with me as I need, answers all my questions, asks about my life and is sincerely interested concerned and caring."
02/21/2017
"9. Excellent."
02/10/2017
"Always listens even if I go on and on."
12/27/2016
"Very nice and really took an interest."
11/14/2016
"Dr. Kristen Obrien is really the best doctor I have ever had in so many ways. Manner and communication is tops, skill and knowledge is supreme and she knows how to build an effective team. My entire family sees her and I always recommend her to our friends in the area. We trust her with our lives. What more can we say."
10/31/2016
"Dr. O'Brien met me for the first time since we are currently in the process of moving from Queens to Suffolk County. She showed great interest and concern in my past history and made sure to recommend doctors in the area - that is GYN, mammogram facility, colonoscopy, etc. Very satisfied with Dr. O'Brien's thoroughness."
10/24/2016
"Dr. Kristen O'Brien knows me by name and asks about each one of my family and how they are doing. She gets to know her patients personally and takes an interest in them as people, not just as patients. What a refreshing change from some of the "stuffy" doctors of the past."
10/04/2016
"good overall experience. would recommend"
09/27/2016
"Dr.O'Brien is an excellent care provider. Very happy with her."
09/02/2016
"I never had a bad experience with my dr. - always positive & caring (all drs. should be like her) but unfortunately, they are all not)."
08/30/2016
"Two people I care greatly about recommend & being treated wonderfully by Dr. O'Brien."
08/15/2016
"Very nice and knowledgable."
08/11/2016
"Easy to talk to. Exceptional doctor."
08/03/2016
"Doctor took her time to explain my health and care."
08/03/2016
"Dr. O'Brien has always spends time enough to explain things."
05/31/2016
"Superior, professional doctor!"
05/31/2016
"Dr. O'Brien is a wonderful MD who I followed to her new practice and have recommended to colleagues."
05/02/2016
"Dr. K OB is an excellent physician. I would recommend her."
04/19/2016
"I have recommended Dr. O'Brien already."
04/13/2016
"The best!!"
04/07/2016
"This doctor was wonderful. She was very knowledgeable and friendly."
04/05/2016
"I wish all providers were this dedicated, personable and concerned about their patients."
02/29/2016
"Since I first began seeing Dr. O'Brien in 2010 she has always treated me with respect, concern for my overall well being and an understanding of my health issues. My very first appointment with her was to obtain medical clearannce for surgery for breast cancer and my most recent visit was follow up S/P left upper lobe lobectomy for lung cancer. I am also an RN, and am now unable to work due to respiratory disability. Dr. O'Brien has always demonstrated compassion and concern and I NEVER feel rushed during my appointments with her. On this most recent visit she has an FNP student with her and this student indicated to me that she is learning much from Dr. O'Brien, not only the clinical information but how to be with patients. I highly commend Dr. O'Brien as a medical professional and would and have most definitely recommended her to not only friends and family but to other people I have encountered in other medical facilities (other patients)."
02/25/2016
"My daughter and I are both patients and have recommended her to many people."
02/01/2016
"Dr. O'Brien is very intuitive and pays attention to your concerns & needs -"
01/17/2016
"DR O'BRIEN WAS A WARM, CARING DR."
01/11/2016
"Couldn't be happier! Long time since I've felt comfortable with Primary Dr."
12/01/2015
"Always good -"
11/25/2015
"Excellent caring, understanding."
10/13/2015
"Dr. O'Brien always listens to and address all my concerns. She provides intelligent, professional, personal care."
10/08/2015
"My daughter and sister in law go to Dr. Obrien - my recommendation."
08/24/2015
"Dr. O'Brien is very professional & thorough with information."
08/13/2015
"Always explains everything to me."
07/08/2015
"Dr. O'Brien is very thorough. Fully confident in her abilities."
06/30/2015
"Best!"
06/12/2015
"Always good experience."
04/28/2015
"Dr. O'Brien is personable and kind. She spent more time with me than any other dr. has."
02/13/2015
"Our MD, Dr. Kristen O'Brien is an excellent MD. Everyone should be so lucky -"
12/17/2014
"Dr. O'Brien is pleasant, professional, caring, thorough! Best dr. I've ever had."
09/11/2014
"Dr. Kristen is always up beat "RELAXES ME.""
07/15/2014
"Until Dr. O'Brien I always had male doctors took getting... but now I am very comfortable."
05/15/2014
"The doctor was able to listen, answer my question and give good information about my health."
03/17/2014
"Have recommended many times."