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Michael Mannstadt

Michael Mannstadt, MD

Endocrinology

Highlights

Languages

  • English

Gender

Male

About Michael Mannstadt

Michael Mannstadt, MD is Chief of the Endocrine Unit at Massachusetts General Hospital and Associate Professor in Medicine, Harvard Medical School, both in Boston. He is a Board Certified Endocrinologist.

He earned his MD from Jena University in Germany. He completed his residency in Medicine, Fellowship in Endocrinology and Chief Residency in Medicine, all at Massachusetts General Hospital and Harvard Medical School, Boston.

Dr. Mannstadt's clinical interest focuses on disorders of mineral metabolism and bone diseases. His research concentrates on the basic and translational aspects of parathyroid hormone with a particular interest in hypoparathyroidism.

Locations

  1. Massachusetts General Endocrine Associates
    • 15 Parkman Street, Wang Building, Suite 730A, Boston, MA 02114
    • Get Directions

Expertise

Education

  • Fellowship: Massachusetts General Hospital, Endocrinology, 2005
  • Residency: Massachusetts General Hospital, Medicine/Endocrine, 2004
  • Internship: Ludwig Maximilians University, 2001
  • Medical Education: Friedrich Schiller University, 1991

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2006

Insurance

This provider may accept more insurance plans than shown. Please call the practice to find out if your plan is accepted.
Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Humana
  • Maine Community Health Options
  • Mass General Brigham Health Plan
  • MassHealth
  • Medicaid ME
  • Medicaid NH
  • Medicaid RI
  • Medicaid VT
  • Medicare
  • Medicare ACO
  • Multiplan
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense
  • WellSense NH

Ratings & Reviews

4.9 out of 5

117 ratings, 39 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

How likely would you be to recommend this provider to your family and friends?
Search reviews
  • Reviewed on 3/2/2026

    I really appreciate the attention and care that Dr. Mannstadt provides at every visit. Thank you!

  • Reviewed on 2/16/2026

    Very positive experience with a kind and knowledgeable professional.

  • Reviewed on 2/16/2026

    great

  • Reviewed on 2/14/2026

    He is a knowledgeable doctor

  • Reviewed on 2/25/2026

    I love Dr mannstadt

  • Reviewed on 2/24/2026

    Dr Mannstadt is very knowledgeable and a great communicator. He is also very patient, & excellent at explaining things. I have every confidence in his expertise.

  • Reviewed on 2/4/2026

    Highly helpful, knowledgeable and very nice. Very pleased that we flew in to Boston and had an opportunity for an appointment with him.

  • Reviewed on 2/2/2026

    Dr M is exceptionally thoughtful and knowledgeable; a truly wonderful doctor!

  • Reviewed on 1/31/2026

    Dr. Mannstadt is an excellent communicator and listener who answered all of my questions thoroughly and with expertise. He is easy to talk to and extremely pleasant.

  • Reviewed on 1/27/2026

    Excellent!!?

  • Reviewed on 1/26/2026

    Lucky to have Dr. Mannstadt.

  • Reviewed on 1/14/2026

    Dr. Mannstadt has been my doctor for many years now. I appreciate his expertise!

  • Reviewed on 12/15/2025

    Good experience. Dr. Mannstadt is thorough, professional and very knowledgeable. He exhibits thoughtfulness and caring of his patients.

  • Reviewed on 11/27/2025

    Dr. Mannstadt was very good. We had an excellent experience with him. He was very knowledgeable about my bone disease and he also answered the questions I and my parents had. Also, he messaged me through patient gateway immediately after my results came out. Actually, the second day he saw me and about my about the results and he asked me questions as well about that. Yeah, it seems that he followed up with me immediately after my visit with him. So we would definitely ?

  • Reviewed on 11/17/2025

    I liked that he first asked, How are you doing? It immediately relieved some of the anxiety and concerns I had. It was helpful to do a tele call due to some mobility issues, .. Extremely knowledgeable and communicative. He is timely and prompt. Also it was apparent that he went thoroughly over our last visit, tests and outcomes, Set up our next appointment himself, setting goals and follow up.

  • Reviewed on 11/15/2025

    He made me feel at ease so I could "hear" the information he had. I feel that we will work together making the decisions about my healthcare.

  • Reviewed on 10/29/2025

    Navigating health issues is so much easier when you have complete confidence in and respect for your physician. We adore Dr. Mannstadt. [redacted]

  • Reviewed on 10/9/2025

    Dr. Michael Mannstadt is so wonderful. He's a wonderful doctor. He's the one who's monitoring me more and I haven't gone to emergency room ever since. I have been monitored by him in my health and also my lab work. He's an excellent doctor and I highly recommend him. I pray for him. Thank you. God bless.

  • Reviewed on 9/26/2025

    He is absolutely excellent! There is no one better!!!

  • Reviewed on 9/24/2025

    Dr. Michael Mannstadt has been my endocrinologist for many years, He has the best listening skills, of any MD I have ever had. He is attentive, polite , and brillant, He keeps up with the latest recommendations, to treat Thyroid and parathyroid disease. I am so lucky to have him as my Doctor!

  • Reviewed on 9/22/2025

    Dr. Mannstadt is the best. I am so fortunate to have him for my osteoporosis care over these last 15+ years.

  • Reviewed on 9/22/2025

    Knowledgeable. Good communication

  • Reviewed on 9/8/2025

    They were all awesome

  • Reviewed on 9/8/2025

    Dr Mannstadt, in addition to being extremely knowledgeable, explained my condition very well and developed a treatment that I could easily understand and follow. We are lucky to have him in our city.

  • Reviewed on 9/8/2025

    I would rate this Doctor 5. THE BEST

  • Reviewed on 9/5/2025

    Great

  • Reviewed on 9/4/2025

    I felt in very good hands with Dr M

  • Reviewed on 9/1/2025

    Dr. Mannstadt is very knowledgeable about hyperparathyroidism and he has been the only endocrinologist who has been able to help me. I think he's incredible.

  • Reviewed on 8/25/2025

    Dr. Michael Mannstadt made an important change to my Vitamin D prescription that will significantly improve my health. He is a wonderful physician. I am deeply grateful that he is part of my care team.

  • Reviewed on 8/2/2025

    Knowledgeable and professional

  • Reviewed on 8/2/2025

    Dr. Mannstadt was very personable, thorough, exceptionally knowledgeable, and answered all my questions. I know that I am in good hands and would highly recommend him to anyone.

  • Reviewed on 7/28/2025

    The provider was knowledgeable, attentive, and took the time to listen. I appreciated the thoughtful explanations and the sense that my concerns were taken seriously. I left the appointment feeling more informed and supported.

  • Reviewed on 7/24/2025

    Great visit! Dr. Mannstadt was knowledgeable and personable and answered all my questions.

  • Reviewed on 7/24/2025

    Dr. Mannstadt is a very kind and compassionate doctor and a great partner in my healthcare.

  • Reviewed on 7/17/2025

    We had a virtual appointment with my elderly mother. I wasn't sure at first how that would go, but somehow, magically, I felt like the doctor was able to make a connection with my mom. Just amazing bedside manner, patience, engaging my mother, in the healthcare choices even though her memory and cognition has deteriorated. It was just an overall amazing experience. Thank you.

  • Reviewed on 7/9/2025

    Dr. Mannstadt is obviously brilliant. Was great to meet him!

  • Reviewed on 6/30/2025

    Excellent clinician,empathetic and supportive human experience

  • Reviewed on 6/26/2025

    Since my first encounter with Dr. Mannstadt a few years ago, I've always appreciated his depth of knowledge & experience on the specific issue that he's treating me for, Pseudohypoparathyroidism. I'm thankful for the competent and careful way that he has managed this condition and brought it under control over the years. If I had seen him first I might have belated 4 spinal fusions which were masking as musculoskeletal disease, and which one doc suspected might have been mulmenengioma. I tell everyone about the skill, experience, and wisdom Dr. Mannstadt!

  • Reviewed on 5/12/2025

    I feel I am in excellent clinical hands with Dr. Mannstadt. As a physician myself, trained at the MGH, I feel very lucky to him.