Maria Fleseriu M.D., F.A.C.E.

Photo of Maria Fleseriu, M.D., F.A.C.E.
Faculty profile
  • Professor and director OHSU NW Pituitary Center

Professor of Neurological Surgery School of Medicine

Accepting new patients

4.8 out of 5 (224 Ratings, 69 Comments)


  • Endocrinology and diabetes

Special focus on

  • Endocrinology


  • M.D., The University of Medicine and Pharmacy of Timisoara, Timisoara Romania 1993
  • Residency:

    • Internal medicine, University Hospital Sibiu, Romania
    • Case Western Reserve University, Internal Medicine
  • Fellowship:

    • Endocrinology, University Hospital Sibiu and National Institute of Endocrinology, Romania
    • Cleveland Clinic, Endocrinology, Diabetes and Metabolism
  • Certifications:

    • Board Certified in endocrinology


Dr. Fleseriu received her medical degree from The University of Medicine and Pharmacy of Timisoara, Romania and completed residency training in internal medicine and an endocrinology fellowship with a focus in pituitary disorders in Romania. Subsequently, she completed an additional internal medicine residency at Case Western Reserve University, Cleveland, Ohio and an endocrinology fellowship at Cleveland Clinic Foundation, Cleveland, Ohio.

Dr. Fleseriu has a long standing clinical and research interest in the pathophysiology and treatment of important clinical aspects of pituitary and adrenal disease. Her recent research is devoted to new treatments of pituitary tumors. She is active in international collaborative studies that include treatment with short and long acting novel multiligands somatostatin analogs, new chimeric molecules directed towards somatostatin and dopamine receptors as well as a new glucocorticoid receptor blocker.

She is a frequent guest speaker on various topics related to treatments of pituitary tumors, especially acromegaly and Cushing’s disease.

As the Director of the NW Pituitary Center at OHSU, Dr. Fleseriu champions a balanced approach to clinical management, combining the most recent advances in the field of neuroendocrinology and the aggressive pursuit of multidisciplinary research. She remains highly involved in teaching medical students, residents, and fellows as well as physician assistant students.

Dr. Fleseriu has published extensively and has coauthored several book chapters detailing pituitary and thyroid pathology.

She is a specialty chief editor for Frontiers in Endocrinology: Pituitary Endocrinology

Clinical interests:

She focuses her clinical practice on the diagnosis and treatment of pituitary and adrenal tumors and pituitary dysfunction, with a particular interest in growth hormone excess (acromegaly) and on cortisol excess (Cushing) and deficiency (adrenal insufficiency).

Acromegaly Cushing’s Disease Complex prolactinomas Neuroendocrine disorders Non-functioning pituitary tumors Adrenal disorders

Clinical trials

Dr. Fleseriu is a Professor of medicine/endocrinology and neurological surgery and has served as director of the NW Pituitary Center at Oregon Health & Science University, Portland, OR since 2007. She is a member of  the Editorial Boards for Pituitary and Faculty of 1000-Neuroendocrinology and is an ad hoc reviewer for numerous other journals. She is a member of the Endocrine Society Clinical Guidelines Committee and the American Association of Clinical Endocrinologists Continuing Medical Education Committee.

Visit the Department of Neurological Surgery's website for information about academics, conferences, residency and fellowships.

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  • English

Patient Ratings

4.8 out of 5 (224 Ratings, 69 Comments)

The patient ratings score is an average of all responses to the question "How likely would you be to recommend this provider to your family and friends (on a scale of 0 to 10)" on our nationally-recognized NRC patient surveys.

Patient Comments

  • Oct 07, 2019

    Dr Fleseriu is so kind and caring! She’s very knowledgeable and she has an individual plan for each of her patients.

  • Sep 28, 2019

    Did not have to wait long for her to come in even though they were short handed.

  • Sep 28, 2019

    Extremely approachable and great communicator, I feel well taken care off

  • Sep 27, 2019

    Very good!!

  • Sep 27, 2019

    Very nice, very helpful and answered all my questions and that's it.

  • Sep 21, 2019

    I feel lucky to have Dr. Fleseriu as my doctorThe staff is competent, professional and friendly. It helps me to know that I am in good hands

  • Sep 03, 2019

    Very professional, courteous and knowledgeable.

  • Aug 16, 2019

    My Dr. was attentive to my concerns

  • Aug 14, 2019

    She explains things well. And she listens to my concerns. Very friendly doctor.

  • Jul 09, 2019

    Maria and her team were on-point. I appreciated that Maria provided her insight pertaining to several questions I had.

  • Jul 08, 2019

    Very friendly & professional.

  • Jul 03, 2019

    Dr. Fleseriu, is very attentive, kind, and helpful.

  • Jun 16, 2019

    Pleased with efficiency, professionalism of staff, nurses and Dr. Dr. exceeded expectations in her knowledge and expertise. Left with more information and realistic options for testing, possible outcomes and treatments.

  • May 30, 2019


  • May 25, 2019

    Wonderful staff and Maria has so much empathy.

  • May 24, 2019

    I am a drug study participant, and therefore am at OHSU monthly. The quality and professionalism of care is always stellar.

  • May 11, 2019

    Dr. Fleseriu is exceptionally knowledgeable in her field and Incredibly kind. I always feel very considered when I have had an office visit with her and that she is looking out for my very best health and interest. She is exceptional because of her warmth and that makes her an easy person to speak with which is unusual for medical providers because they can be so intimidating, but she really takes the extra time to make her patients feel comfortable and she is exceptional with the care that she provides.

  • May 01, 2019

    Outstanding, caring, smart

  • Apr 24, 2019

    She’s so knowledgeable and friendly!

  • Apr 24, 2019

    I was very happy with my experience with my doctor

  • Apr 19, 2019

    She was very prepared and aware of my info/hx/case. Efficient. Good educator, explaining everything very well, thoroughly (current findings, results, future acts).

  • Apr 15, 2019

    She is very knowledgeable. She listens to your concerns and always gives you time to ask questions and clarify things. I trust her option and treatment advice.

  • Apr 15, 2019

    I think that Dr. Fleseriu is amazing. She's wonderful. The staff there is wonderful. I am happy to have them as my physicians and nurses and medical assistants. Very good.

  • Apr 03, 2019

    I felt listened to. I have New hope that we will finally figure out how I can get better. I am looking forward to continue working with OHSU

  • Apr 02, 2019

    She's very personable, professional, and knowledgeable.

  • Apr 01, 2019

    Dr. Fleseriu is very precise. She's full of information and she listens and answers all questions. Thank you.

  • Mar 30, 2019

    Very good

  • Mar 18, 2019

    She is absolutely wonderful. She has not only a diagnosed me, but she listens to me, she hears me, she really cares. I wish she could do all my care if she wasn't just a specialist but I understand that she has to be that way, but I love her. She's great. She's wonderful. I can't say enough good things. Thank you.

  • Mar 18, 2019

    I was impressed with her knowledge and her concern. It was wonderful.

  • Mar 14, 2019

    She has cared for me for several years due to a very complicated pituitary status

  • Mar 13, 2019

    Takes a long time to see the dr. I was sceduled with. Other dr came in without explaining who they were or why they were there. Why have patients fill out medical history forms and come early to do so if most of the appointment with a mystery doctor was asking me to repeat my family medical history over and over again and she still didn't listen or enter it correctly. The actual dr i was scheduled to see did come at the end and was very helpful.

  • Mar 09, 2019

    I have had several appointments with this doctor. I believe that she genuinely concerned about my medical condition.

  • Feb 17, 2019

    Dr. Fleseriu listened and had feedback to all of my concerns and address all my concerns individually completely. She was very thorough and I look forward to continuing seen her in the future. I hope that she could help me with my health.

  • Feb 16, 2019

    She and her team were kind, listened, and I did not feel rushed.

  • Jan 27, 2019

    My doctor is extremely knowledgeable and kind.

  • Jan 24, 2019

    She was very thorough explaining my current situation.

  • Jan 24, 2019

    Dr. Fleseriu has consistently proven to be extremely knowledgeable, informative and compassionate in her conduct.

  • Jan 12, 2019

    I was not given any advanced notice of any of the procedures to be done the day I went in. the middle of it all, three interns jumped in. I had no idea who they were, what they represented, and they spoke so fast, I could barely understand them. I resented it and I will not be seeking any further medical attention from OHSU.

  • Jan 10, 2019

    I feel that I am truly receiving the very best care for my health with Dr. Fleseriu. I know that she stays on top of the very latest science in her field and has a wonderful bedside manner with her patients, knowing each of them personally. She also takes care in selection of her clinic team to surround herself with other caring professionals.

  • Dec 29, 2018

    Dr. Fleseriu is personable, easy to talk to, a good listener, knowledgeable and trustworthy. She always answers all my questions and concerns and I feel she has my best interest at heart with every visit. I?m grateful to have her as my doctor.

  • Dec 29, 2018

    Dr Fleseriu, is thorough, knowledgeable and has a great bedside manner. I highly recommend her!

  • Dec 29, 2018

    I have been a patient for the past 3 years and always feel that when I go for my visit with Dr. Fleseriu that I get good attention and good information and she takes all the time I need to answer all my questions and determine what kind of treatment or follow up I need.

  • Dec 20, 2018

    I have never been to OHSU that the staff has NOT been awesome in every way, professional, courteous and polite. Everyone is also so helpful! THANK YOU!

  • Nov 21, 2018

    She is great! Very attentive and informative.

  • Nov 16, 2018

    Dr. Fleseriu's been great. She's been helping me get better after the brain tumor was removed, and she's still working with me to continue getting better. So, no, she's been great and I'm really glad that I have her as my doctor.

  • Nov 15, 2018

    She was very knowledgeable and helpful concerning my illness. The staff was also excellent.

  • Nov 08, 2018

    Maria is awesome she makes every appointment easy. We travel a long way she always has everything she needs done ready for us.

  • Nov 05, 2018

    Dr. Fleseriu is very knowledgeable, very passionate, and very interested in the pituitary gland and those that suffer from tumors on it. Sometimes... I got the impression that she was pre-destined to evaluate what I may or may not have said, but... and was certainly abrupt occasionally, but for the most part she was approachable, knowledgeable, concerned and responsive. Overall, I thought the experience rated an 8.

  • Sep 22, 2018

    I was very impressed with Dr. Fleseriu. She is more knowledgeable about my specific medical condition than any other doctor I have encountered. Within a short amount of time, she had educated me on several different areas of my pituitary disorders - more than I have learned over the previous 20 years. I quickly developed trust with her, seeing how well she knows pituitary conditions. She was armed with a plan of action right away, the key word being "action." There was none of the same old "we are doing all we can, there is little we know, just deal with it," etc. I think the most important thing is that Dr. Fleseriu provided me with hope, which I had lost a long time ago. I look forward to my new treatment with Dr. Fleseriu. I feel like I am finally in capable hands!

  • Sep 13, 2018

    This was a follow-up appointment with Dr. Fleseriu. In all of my previous encounters, either as the patient or accompanying the patient, Dr. Fleseriu has proven to be very knowledgeable and informative while also demonstrating genuine interest and concern for myself and other family members who either accompanied me or I accompanied.