Karen Michele
Kostroff, MD

Surgical Oncology

(516) 775-7676

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About your doctor:

Member of Northwell Health Physician Partners
Languages spoken:


Academic titles

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

Medical school

  • Boston University School of Medicine


  • New York Hospital Weill Cornell Medical Center


  • New York Hospital Weill Cornell Medical Center


  • Brigham & Womens Hospital


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Locations & insurance

  • 2001 Marcus Avenue
    Suite W270
    New Hyde Park, NY 11042

    Fax: (516) 775-4029

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Patient ratings & comments

Northwell Health Physician Partners is improving the patient experience by displaying physician ratings and reviews. Learn more.

Friendliness/courtesy of the care provider


Explanations the care provider gave you about your problem or condition


Concern the care provider showed for your questions or worries


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


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


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


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


Amount of time the care provider spent with you


Your confidence in this care provider


Likelihood of your recommending this care provider to others


Most recent comments:

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

"I cannot speak highly enough about Karen Cat I cannot speak highly enough about Dr Kostroff"

"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"

"I would highly recommend Dr. Kostroff - she is an extraordinary surgeon."

"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."

"Dr. Kostroff was wonderful."

"There is no doubt that I would recommend Dr. Kostoff. She is warm, caring and an excellent surgeon"

"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!"

"love dr kostroff she has been my dr for over 12 years she is professional and knowledgeable"

"Dr. Kostroff has provided me with the utmost professional friendliness and courtesy always."

"This was an annual visit; no specific problem. I have been a patient for 15 years & Dr. Kostroff operated on me in 2004."

"Would highly recommend Dr. Kostroff."

"Dr. Kostroff is an outstanding physician."

"Amazing on all levels."

"Have recommended Dr. Kostroff several times to friends and family."

"Dr. Kostroff is great."

"Dr. Kostroff shows compassion for her patients."

"I cannot heap enough praise on this wonderful, kind and expert physician. She makes miracles happen."

"Have recommended her to many people."

"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."

"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."

"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!"

"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."

"Love Dr Kostroff"

"upmost confidence in Dr Kostroff. She is an amazing clinician"

"Dr. Kostroff is the best professional of any of my other doctors. She rocks!"

"I have used Dr. Kostroff for over 18 years, she is the best"

"Dr. Kostroff is wonderful. She showed me a model for other problems."



"Dr. Kostroff is very professional. She is very warm & considerate. I am so glad that she is my doctor."

"Always good experience."

"She's a great physician"

"I have highly recommend Dr. Kostroff to others."

"Good experience. The best."

"Very thoughtful and warm. Always get a hug."

"EXCEPTIONAL breast surgeon."

"Good experience."

"I find Dr. Kostroff to be friendly, knowledgeable & caring."

"#1. Dr. Kostroff."

"Very caring physician - only doctor has eased my mind during this process."

"Dr. Karen Kostroff saved my life!"

"Dr. Karen Kostroff is the best doctor I know. She saved my life."

"Dr. Kostroff has always had the best manner regarding me and my concerns and health."

"made me feel comfortable throughout the whole experience."

"Dr. Kostroff is a terrific doctor! Dr. Kostroff is knowledgeable, caring - the best!!"

"Dr. Kostroff has been my go to breast cancer surgeon for over 20 yrs. - always & consistently caring and professional."

"Great provider and great staff"

"Dr. Kostroff previously performed a lumpectomy on me. she is very patient with me and understand my situation."


"I have referred a number of friends to her. And they have made appointments with her."

"Dr Kostroff came highly recommended to me and I am sure I will recommend her to others post surgery."

"Dr. Karen Kostroff is the best as she is professionally kind, courteous, caring and knowledgeable!"

"love her"

"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."

"Dr. Kostroff is a superior doctor in all areas both personal and professional."

"Dr. Kostroff is the best!"

"She is excellent ______ very caring."

"Routine check-up/no questions or worries excellent, caring physician. I have the utmost confidence in Dr. Kostroff. 9. ++."

"Fantastic surgeon. Confidence A+."

"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."


"Dr. Kastroff is superb, informative professional & thorough! I always do."

"Dr. Kostroff saved my life."


"#1 - #10. Excellent."

"I can only highly recommend.my experiences have only been positive"


"Always attentive and professional"

"she's wonderful pleasant and so knowledgeable."

"wonderful Dr. Kostroff"

"best breast surgeon ever."

"True professorial and great staff. It's worth the drive."

"all good"

"I would, surely, recommend Dr. Kostroff to any of my friends. She is terrific!"

"Dr. Kostroff goes above and beyond the call of her duty."

"Dr. Karen Kostroff is an excellent doctor!"

"All good."

"I did recommend Dr.Kostroff and she SAVED my friend suffering from breast cancer!!"


"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."

"Always see Dr. Kostroff."

"She is an excellent surgeon. I will recommend her to anyone. She made me feel at easy during such a difficult time."

"I travel a great distance to see Dr. Kostroff."

"Excellent rapport, kindness, professionalism!"

"In my estimation there is no better doctor in this field than Dr. Karen Kostroff."

"Absolute professionalism & human compassion - Amazing degree of knowledge & confidence as well."

"She is one of my favorite specialists."


"Outstanding dr."

"Excellent doctor!!!"

"Excellent experience care - & knowledge of patience was very good excellent doctor - #1 in my book - #9. + plus. #10. I have."

"There are no words to adequately express the confidence & respect I have for this wonderful, caring, doctor - compassionate & professional."

"I owe my life to Dr. Kostroff."

"Dr. Kostroff is the best!"

"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!"

"Good experience."


"She is wonderful and explained everything clearly."

"Best people work at your hospital."