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

4.7 out of 5 (183 Ratings, 49 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

4.7 out of 5 (183 Ratings, 49 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

  • 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!

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