Credentials

Credentials

  • Academic titles

    • Assistant Professor, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell

  • Medical school

    • Boston University School of Medicine

  • Residencies

    • New York Hospital Weill Cornell Medical Center

  • Internships

    • New York Hospital Weill Cornell Medical Center

  • Fellowships

    • Brigham & Womens Hospital

  • Affiliations

Locations & insurance

Locations & insurance

2001 Marcus Avenue, Suite W270Lake Success, NY 11042

Insurance information

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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.

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| 372.0 patient ratings & 134 patient comments

Friendliness/courtesy of the care provider

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Explanations the care provider gave you about your problem or condition

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Concern the care provider showed for your questions or worries

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

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

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

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

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Amount of time the care provider spent with you

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Your confidence in this care provider

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Likelihood of your recommending this care provider to others

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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.

08/24/2018
"Dr. Kostroff is both an incredible doctor & person. She is patient, kind, compassionate and smart."
08/22/2018
"Dr. Kostroff is wonderful! Returns her calls immediately."
08/21/2018
"i already do recommend her"
08/13/2018
"Dr. Kostroff is a caring physician, always listens and is always there for her patients."
08/01/2018
"Dr Kostroff is smart and very reassuring"
07/30/2018
"Dr. Kostroff made me feel at ease with her demeanor."
07/26/2018
"Dr. Kostroff is not only highly qualified as a physician, but she is also a caring and compassionate doctor. I have put my life in her hands and am grateful to have her as my doctor. 1. EXCELLENT. "
07/17/2018
"Dr. Kostroff is compassionate & empathetic. I have been going to her for many years."
07/17/2018
"Dr. Kostroff has been my breast surgeon for 16 years, during a bout with breast cancer and yearly followups. She is not only a superlative surgeon, but a caring individual."
07/16/2018
"Time care provider gave me was sufficient to my current visit. I know that they are advised to closely schedule patients, but that will give as much time as needed during visits. In Dr. Kostroff's case, she did not seem rushed. I have seen other providers who did and would point out such if surveyed."
07/16/2018
"I would most definitely recommend Dr. Kostroff to others."
07/05/2018
"Dr. Kostroff saved my life 30 years ago. She continues to be an informative, caring doctor. Always on top of latest treatments, etc. I have 100% confidence in her. Love her as a person."
07/02/2018
"Dr. Kostroff is the best!"
06/28/2018
"Dr. Kostroff gave me as much time as I needed recommended Dr. Kostroff very highly to friends & family utmost confidence answered all questions & assurances could not have a better doctor or her staff during very emotional times."
06/27/2018
"Dr. Kostroff is excellent - wish all my doctors are like her -"
06/22/2018
"Doctor was very thorough, patient, & kind she made me feel safe."
06/18/2018
"Dr. Kostroff is extraordinary! I was referred to her by two different women and chose her after getting other opinions."
06/18/2018
"The rating of "very good" in no way explains how "WONDERFUL " Dr. Kostroff is. She is an amazing, brilliant & caring person."
05/31/2018
"Did not need any meds or explanations. Routine check up. "
05/29/2018
"I have been seeing Dr. Kostroff for 29 years. I recommend her all the time to others who find themselves needing a breast surgeon."
05/26/2018
"Dr. Kostroff is excellent, as is her staff."
05/25/2018
"Follow up visits after lumpectomy 9 years ago."
05/17/2018
"Excellent physician1"
05/05/2018
"I have total confidence in Dr. Kostroff, and have enthusiastically recommended her to others who are now her patients."
04/26/2018
"I travel a long distance to see Dr. Kostroff. I have total confidence in her. She is very compassionate. I have referred others."
04/25/2018
"I have had a 9 year relationship with Dr. Kostroff. From the beginning I felt safe during a very stressful time. As the years have passed my concerns were addressed and respected. I can smile and come into the office with confidence that I am cared for with the utmost attention."
04/24/2018
"Very professional, loved HER."
04/19/2018
"Dr. Kostroff is a great doctor!"
04/18/2018
"For 21 years Dr. Kostroff has ALWAYS been concerned, patient and kind."
04/17/2018
"This was 5th yearly follow up visit. Treatments remain the same."
04/17/2018
"DR. KOSTROFF IS ALWAYS CLEAR in her instructions ! ."
04/10/2018
"dr Kostroff is the best you can findshe saved my life with the treatment she gave me you cannot find a better dr"
04/09/2018
"Dr. Kostroff is a caring, compassionate doctor."
04/04/2018
"Under Dr. Kostroff care close to 20 years. She is so caring and kind."
03/26/2018
"Kind knowledgeable and compassionate provider."
02/12/2018
"I cannot speak highly enough about Karen Cat I cannot speak highly enough about Dr Kostroff"
02/10/2018
"I am a breast cancer survivor, not receiving active treatment at this time. Discussed the continued need for mammogram, sonogram and MRI with Dr Kostroff"
01/30/2018
"I would highly recommend Dr. Kostroff - she is an extraordinary surgeon."
01/26/2018
"Dr. Kostroff always goes above and beyond the usual care provided; she even offers her availability for any special concerns that should arise - she is available for comfort and advice."
01/21/2018
"Dr. Kostroff was wonderful."
01/21/2018
"There is no doubt that I would recommend Dr. Kostoff. She is warm, caring and an excellent surgeon"
01/05/2018
"Having been a patient of Dr. Kostroff for 15 years, I place my confidence in her whole heartily. Having moved away from LI and live in CT and now Florida, I wouldn't think of changing doctors, for my own peace of mind I will remain her patient!"
12/25/2017
"love dr kostroff she has been my dr for over 12 years she is professional and knowledgeable"
12/19/2017
"Dr. Kostroff has provided me with the utmost professional friendliness and courtesy always."
11/24/2017
"This was an annual visit; no specific problem. I have been a patient for 15 years & Dr. Kostroff operated on me in 2004."
11/22/2017
"Would highly recommend Dr. Kostroff."
11/18/2017
"Dr. Kostroff is an outstanding physician."
11/15/2017
"Amazing on all levels. "
11/14/2017
"Have recommended Dr. Kostroff several times to friends and family."
11/01/2017
"Dr. Kostroff is great. "
10/23/2017
"Dr. Kostroff shows compassion for her patients."
10/17/2017
"I cannot heap enough praise on this wonderful, kind and expert physician. She makes miracles happen."
10/17/2017
"Have recommended her to many people."
10/06/2017
"Going through heart cancer - Dr. Kostroff was the best, most compassionate doctor I have ever been to, if _____ doctors took the time she did this would would be a better place."
10/02/2017
"Dr. Kostroff is an outstanding doctor with an incredible bedside manner. She explained everything in detail and always made sure that I understood everything about my breast cancer. Words cannot describe how confident I felt using her. "
09/26/2017
"I adore Dr. Kostroff. I have the utmost confidence in her and feel blessed that she is caring for me since 2008. As far as I am concerned, I have the best breast surgeon ever!"
09/19/2017
"Dr. Kostroff did not talk down to me. Of the 3 breast surgeons I saw, her treatment plan for me made the most sense, was the most up-to-date (using the SAVI scout) and she seemed most confident about the procedures, & instilled the most reassurance in me."
08/14/2017
"Love Dr Kostroff"
08/14/2017
"upmost confidence in Dr Kostroff. She is an amazing clinician"
07/28/2017
"Dr. Kostroff is the best professional of any of my other doctors. She rocks!"
07/20/2017
"I have used Dr. Kostroff for over 18 years, she is the best"
07/18/2017
"Dr. Kostroff is wonderful. She showed me a model for other problems."
07/17/2017
"good"
06/30/2017
"Good."
06/27/2017
"Dr. Kostroff is very professional. She is very warm & considerate. I am so glad that she is my doctor."
06/26/2017
"Always good experience."
06/13/2017
"She's a great physician"
05/31/2017
"I have highly recommend Dr. Kostroff to others."
05/26/2017
"Good experience. The best."
05/24/2017
"Very thoughtful and warm. Always get a hug."
05/18/2017
"EXCEPTIONAL breast surgeon."
05/18/2017
"Good experience."
04/30/2017
"I find Dr. Kostroff to be friendly, knowledgeable & caring."
04/05/2017
"#1. Dr. Kostroff."
04/04/2017
"Very caring physician - only doctor has eased my mind during this process."
03/31/2017
"Dr. Karen Kostroff saved my life!"
03/30/2017
"Dr. Karen Kostroff is the best doctor I know. She saved my life."
03/27/2017
"Dr. Kostroff has always had the best manner regarding me and my concerns and health."
02/27/2017
"made me feel comfortable throughout the whole experience."
02/22/2017
"Dr. Kostroff is a terrific doctor! Dr. Kostroff is knowledgeable, caring - the best!!"
02/10/2017
"Dr. Kostroff has been my go to breast cancer surgeon for over 20 yrs. - always & consistently caring and professional."
01/08/2017
"Great provider and great staff"
01/07/2017
"Dr. Kostroff previously performed a lumpectomy on me. she is very patient with me and understand my situation."
12/22/2016
"Good."
12/19/2016
"I have referred a number of friends to her. And they have made appointments with her."
12/06/2016
"Dr Kostroff came highly recommended to me and I am sure I will recommend her to others post surgery."
11/28/2016
"Dr. Karen Kostroff is the best as she is professionally kind, courteous, caring and knowledgeable!"
11/17/2016
"love her"
10/22/2016
"Dr. Karen Kostroff is an excellence doctor and surgeon who I have the up most confidence in for all the years I have been going to her."
10/17/2016
"Dr. Kostroff is a superior doctor in all areas both personal and professional."
10/08/2016
"Dr. Kostroff is the best!"
09/30/2016
"She is excellent ______ very caring."
09/29/2016
"Routine check-up/no questions or worries excellent, caring physician. I have the utmost confidence in Dr. Kostroff. 9. ++."
09/29/2016
"Fantastic surgeon. Confidence A+."
09/18/2016
"Besides Dr. Kostroff being filled with wisdom and expertise in her field, she has also given me great peace of mind. I am very thankful to be under her care."
08/26/2016
"VERY GOOD EXPERIENCE."
08/23/2016
"Dr. Kastroff is superb, informative professional & thorough! I always do."
08/06/2016
"Dr. Kostroff saved my life."
07/13/2016
"DR. KOSTROFF IS THE BEST!!"
07/13/2016
"#1 - #10. Excellent."
06/14/2016
"I can only highly recommend.my experiences have only been positive"
06/05/2016
"good"
05/30/2016
"Always attentive and professional"
05/21/2016
"she's wonderful pleasant and so knowledgeable."
05/14/2016
"wonderful Dr. Kostroff"
04/19/2016
"best breast surgeon ever."
04/13/2016
"True professorial and great staff. It's worth the drive."
04/05/2016
"all good"
03/14/2016
"I would, surely, recommend Dr. Kostroff to any of my friends. She is terrific!"
03/07/2016
"Dr. Kostroff goes above and beyond the call of her duty."
02/15/2016
"Dr. Karen Kostroff is an excellent doctor!"
12/29/2015
"All good."
12/22/2015
"I did recommend Dr.Kostroff and she SAVED my friend suffering from breast cancer!!"
12/06/2015
"Good"
11/09/2015
"My husband (retired OBGYN) had worked with Dr. Kostroff and had sent two of our friends to see her in the past. They had excellent experiences with her as did I."
09/30/2015
"Always see Dr. Kostroff."
09/02/2015
"She is an excellent surgeon. I will recommend her to anyone. She made me feel at easy during such a difficult time."
08/04/2015
"I travel a great distance to see Dr. Kostroff."
07/09/2015
"Excellent rapport, kindness, professionalism!"
06/11/2015
"In my estimation there is no better doctor in this field than Dr. Karen Kostroff."
05/26/2015
"Absolute professionalism & human compassion - Amazing degree of knowledge & confidence as well."
05/06/2015
"She is one of my favorite specialists."
05/06/2015
"Excellent."
04/30/2015
"Outstanding dr."
04/29/2015
"Excellent doctor!!!"
04/22/2015
"Excellent experience care - & knowledge of patience was very good excellent doctor - #1 in my book - #9. + plus. #10. I have."
03/26/2015
"There are no words to adequately express the confidence & respect I have for this wonderful, caring, doctor - compassionate & professional."
02/20/2015
"I owe my life to Dr. Kostroff."
01/21/2015
"Dr. Kostroff is the best!"
12/26/2014
"When I called Dr. Kostroff's office to make an appointment the doctor herself got on the phone to determine the nature of my problem - at my visit she not only addressed the problem but all questions!"
12/16/2014
"Good experience."
11/14/2014
"Excellent!"
10/23/2014
"She is wonderful and explained everything clearly."
10/09/2014
"Best people work at your hospital."

In the news

In the news

In the news
Northwell Health and the Americana Manhasset raised more than $900,000 for women’s health at the 26th Annual Katz Institute for Women’s Health Luncheon and Fashion Show featuring four designers: alice + olivia, Bandier, Theory and Zimmermann...
Twin sisters honor their mother's memory by surviving and thriving after breast cancer diagnoses.
Northwell Health announced today that it will offer state-of-the-art breast procedures for women undergoing a surgical breast biopsy or lumpectomy at 16 hospitals, surgical locations and outpatient radiology facilities on Long Island...