Loading Complete
Jenna S. Mammen

Jenna S. Mammen, MD, PhD

Endocrinology

Hospital Medicine

Accepting New Patients
Online Booking
Johns Hopkins Affiliations:
  • Johns Hopkins School of Medicine Faculty

Languages

  • French
  • English

14 Insurances Accepted

View all

Gender

Female

About Jenna S. Mammen

Primary Academic Title

Associate Professor of Medicine

Background

Jennifer Mammen, M.D., Ph.D., Assistant Professor of Medicine, is a member the Division of Endocrinology, Diabetes and Metabolism.

Dr. Mammen practices general endocrinology with a focus on thyroid, adrenal and pituitary disorders. She is actively engaged in research on hormonal function and aging.

Research Interests

Thyroid, adrenal and pituitary function in aging

Research Summary

An appreciation for the complexity of human responses to aging has allowed us to recognize that there are multiple pathophysiology processes behind seemingly similar clinical changes in serum hormone levels among older adults.  Using data from the Baltimore Longitudinal Study of Aging, we have recently reported the novel observation that most healthy older adults have relatively stable thyroid function, despite higher average levels among older compared to younger groups. We have demonstrated the presence of diverse aging patterns in the thyroid axis amongst older adults. In particular, while some people clearly have developing hypothyroidism from primary thyroid failure, others have changes in their pituitary that give rise to a similar TSH elevation without lowering thyroid hormone levels.  These different patterns imply different treatment approaches are appropriate in individuals. Ongoing research is directed towards being able to distinguish these differences without the long-term follow up data that is available in the BLSA, in order to develop clinically relevant tests and improve care. We have identified practice patterns and risk factors for thyroid hormone over-use and misuse that constitute a significant public health problem in older adults, and particularly women, which drives the need for targeted therapy and personalized medicine to come to endocrinology.

Selected Publications

  • Mammen JS, McGready J, Ladenson PW, Simonsick EM. Unstable thyroid function in older adults is caused by alternations in both thyroid and pituitary physiology and associated with increased mortality.  Thyroid 2017; 27(11)1370 [PMID 28854871]

  • Mammen JS, McGready J, Oxman R, Chia CW, Ladenson PW, Simonsick EM. Thyroid hormone therapy and risk of thyrotoxicosis in community-resident older adults: Findings from the Baltimore Longitudinal Study of Aging. Thyroid. 2015; 25(9):979 [PMID: 26177259]

  • Mammen, JS and Cooper D, “Lobectomy vs total thyroidectomy in suspicious or malignant lesions” in Transoral Endocrine and Neck Surgery, edited by Russell JO, Tufano R, and Inabnet WB ed. In press.  Springer.

  • Brahmer JR, Lacchetti C, Schneider BJ, Atkins MB, Brassil KJ, Caterino JM, Chau I, Ernstoff MS, Gardner JM, Ginex P, Hallmeyer S, Holter Chakrabarty J, Leighl NB, Mammen JS, McDermott DF, Naing A, Nastoupil LJ, Phillips T, Porter LD, Puzanov I, Reichner CA, Santomasso BD, Seigel C, Spira A, Suarez-Almazor ME, Wang Y, Weber JS, Wolchok JD, Thompson JA. Managements of Immune-Related Adverse Events in Pathients Treated With Immune Checkpoint Inhibitor Therapy: American Society of Clinical Oncology Clinical Practice Guideline Jclin Oncol 2018 Feb 14 [Epub ahead of print] [PMID: 29442540]. 

  • Simonsick EM, Chia CW, Mammen JS, Egan JM, Ferrucci L. Free Thyroxine and Functional Mobility, Fitness, and Fatigue in Euthyroid Older Men and Women in the Baltimore Longitudinal Study of Aging. J Gerontol A Biol Sci Med Sci. 2016; 71(7):961 [PMID: 26791089]

Honors

  • Turock Clinical Scholar, Turock Family Foundation, 7/1/16
  • Passano Physician Scientist, Passano Foundation, 4/1/13
  • Alpha Omega Alpha, 5/30/04
  • Medical Scientist Training Program, National Institutes of Health, 7/1/95
  • Churchill Scholar, Churchill Foundation, 7/1/91

Memberships

  • American Thyroid Association
  • Endocrine Society

Additional Training

  • M.Phil., University of Cambridge (United Kingdom) (1992)
  • PhD, Johns Hopkins Bloomberg School of Public Health (2004)

Locations

  1. Johns Hopkins Bayview Medical Center
    • 4940 Eastern Avenue, Bayview Medical Offices, Level 01 (G), Clinic 4, Baltimore, MD 21224
    • Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville
      • 10751 Falls Road, Falls Concourse STE 412, Lutherville, MD 21093

      Expertise

      Education

      Johns Hopkins University School of Medicine

      Fellowship, Endocrinology, 2010

      Johns Hopkins University School of Medicine

      Residency, Medicine, 2006

      Johns Hopkins Bloomberg School of Public Health

      Graduate School, PhD, 2004

      Johns Hopkins University School of Medicine

      Medical Education, MD, 2004

      Board Certifications

      Endocrinology Diabetes and Metabolism

      American Board of Internal Medicine, 2010

      Insurance

      Johns Hopkins providers accept various commercial health insurance plans. However, they may not be included in all of an insurance company's plans or offerings. This may include Exchange, Medicaid, Medicare, and specific limited benefit plans. Exceptions to participation also exist based on your employer’s benefits package and the provider's location or specialty. Please contact your insurer directly to make sure your doctor is covered by your plan. For more details, please review our Insurance Information.
      Search plans
      • Aetna
      • CareFirst
      • Cigna
      • First Health
      • Geisinger Health Plan
      • HealthSmart/Accel
      • Humana
      • Johns Hopkins Health Plans
      • MultiPlan
      • Pennsylvania's Preferred Health Networks (PPHN)
      • Point Comfort Underwriters
      • Private Healthcare Systems (PHCS)
      • UnitedHealthcare
      • Veteran Affairs Community Care Network (Optum-VACCN)

      Ratings & Reviews

      4.8 out of 5

      109 ratings, 39 reviews

      The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

      Overall Rating by Patient
      Average provider Overall Rating by Patient rating 4.8 out of 5 stars
      Provider Listened Carefully
      Average provider Provider Listened Carefully rating 4.8 out of 5 stars
      Provider Explained Things Clearly
      Average provider Provider Explained Things Clearly rating 4.9 out of 5 stars
      Provider Knew Medical History
      Average provider Provider Knew Medical History rating 4.7 out of 5 stars
      Provider Showed Respect
      Average provider Provider Showed Respect rating 4.8 out of 5 stars
      Provider Spent Enough Time
      Average provider Provider Spent Enough Time rating 4.8 out of 5 stars
      Search reviews
        5 out of 5 stars
        Reviewed on 1/15/2025

        She was thorough considerate factual and compassionate

        5 out of 5 stars
        Reviewed on 12/19/2024

        Dr. Mammen has worked hard with me to keep my thyroid regulated. She has been able to get the thyroid back to the place it should be consistently. I had 6 months of Hashimoto

        5 out of 5 stars
        Reviewed on 12/5/2024

        She listened to my complaints and responded to something others neglected! AA+

        5 out of 5 stars
        Reviewed on 11/14/2024

        Very professional and cordial Explained everything and answered my questions.

        5 out of 5 stars
        Reviewed on 11/7/2024

        I love Dr. Mammen

        5 out of 5 stars
        Reviewed on 11/7/2024

        Dr.Mammen is the finest endocrinologist I have ever been the patient of.

        5 out of 5 stars
        Reviewed on 11/6/2024

        She is really detailed and very focused on my condition. She response very quickly on my chart and Is an excellent doctor.

        5 out of 5 stars
        Reviewed on 11/6/2024

        I thought she did a wonderful job and so did her assistant.

        5 out of 5 stars
        Reviewed on 10/24/2024

        A pleasure to visit.

        5 out of 5 stars
        Reviewed on 10/16/2024

        Dr. Mammen is a good physician and very knowledgeable. I trust her in my care.

        5 out of 5 stars
        Reviewed on 10/14/2024

        Dr. Mammen too time to talk with me and understand my concerns and questions. She explained in detail and treated me as an intelligent person. She explained things to me that other physicians had not.

        5 out of 5 stars
        Reviewed on 10/3/2024

        Great appointment!

        5 out of 5 stars
        Reviewed on 9/23/2024

        Was very good

        5 out of 5 stars
        Reviewed on 9/19/2024

        Very knowledgeable on my situation

        5 out of 5 stars
        Reviewed on 9/18/2024

        Good people do good work!

        5 out of 5 stars
        Reviewed on 9/16/2024

        Dr. Mammen shows excellent concern & is a good listener to my symptoms and medication effects

        5 out of 5 stars
        Reviewed on 9/9/2024

        This was my first visit. I'm very happy with this provider. She's very knowledgable, informative, honest and personable.

        5 out of 5 stars
        Reviewed on 9/5/2024

        Provided good information about my condition.Listened to my concerns

        5 out of 5 stars
        Reviewed on 8/26/2024

        Dr. Mammen is an excellent health care partner.

        4 out of 5 stars
        Reviewed on 8/15/2024

        Gives good, detailed explanation about things when I ask about something.

        5 out of 5 stars
        Reviewed on 7/11/2024

        Dr Mammen was competent, knowledgeable, easily relatable, & friendly. I would rate her one of the best all around doctors I have encountered at Hopkins.

        5 out of 5 stars
        Reviewed on 7/10/2024

        Best

        5 out of 5 stars
        Reviewed on 6/17/2024

        Very good diagnostician, explains so I can understand, I never felt rushed, answered my questions, I felt very comfortable with her

        5 out of 5 stars
        Reviewed on 6/13/2024

        Dr. Mammen is knowledgeable, professional, kind and understanding. She genuinely cares about her patients.

        5 out of 5 stars
        Reviewed on 6/13/2024

        Dr. Mammen was excellent. She took the time to explain my thyroid that is atypical.

        5 out of 5 stars
        Reviewed on 6/12/2024

        Excellent visit. Excellent physician. Dr Took the time to explain everything in a clear and comprehensive manner.

        5 out of 5 stars
        Reviewed on 5/22/2024

        Dr. Mammen is exceeding knowledgeable and made reasonable recommendations.

        5 out of 5 stars
        Reviewed on 5/10/2024

        Very caring. Very attentive. Very empathetic

        5 out of 5 stars
        Reviewed on 5/9/2024

        Dr. Mammen is professional and direct. When I left her office I knew and understood the next steps. Her follow up is impeccable!

        5 out of 5 stars
        Reviewed on 4/18/2024

        Dr. Mammen is a very good communicator, answering all questions thoroughly and efficiently.

        5 out of 5 stars
        Reviewed on 4/18/2024

        Dr Mammen always takes time to listen and explain

        5 out of 5 stars
        Reviewed on 4/17/2024

        Knowledgeable, professional, informed about my medical history

        5 out of 5 stars
        Reviewed on 4/17/2024

        Dr. Jennifer Mammen , was very thorough and spoke with me in detail about the nodules on my thyroid. Put my mind at ease with this condition

        5 out of 5 stars
        Reviewed on 4/8/2024

        Great doctor and visit

        5 out of 5 stars
        Reviewed on 4/8/2024

        Excellent listener

        5 out of 5 stars
        Reviewed on 4/3/2024

        Outstanding!

        5 out of 5 stars
        Reviewed on 3/25/2024

        Detailed explanation of how my thyroid worked in words, I could understand.

        5 out of 5 stars
        Reviewed on 3/14/2024

        Exceeded my expectations in so many ways. I am grateful to have visit with Dr. Mammen.

        5 out of 5 stars
        Reviewed on 2/26/2024

        I was most impressed with the thoughtful professionalism and vast knowledge. Her communication skills were exceptional.