About
Dr. Julia Loewenthal brings a distinctive combination of geriatric medicine, integrative care, and academic medicine to Lutanen Health. She studied Nutritional Biochemistry at UNC Chapel Hill before completing her Internal Medicine residency at Brigham and Women's Hospital. She trained at the Osher Clinical Center for Integrative Health at Brigham and Women's Hospital and holds the designation of Osher Collaborative Faculty Fellow. She holds board certification in both Internal Medicine and Geriatric Medicine, with board certification in Integrative Medicine pending. She serves as Assistant Professor of Medicine at Harvard Medical School.
Dr. Loewenthal directs the Lutanen Housecall Program, providing comprehensive geriatric assessments, medication optimization, post-hospital follow-up, and care coordination in patients' homes. She serves as a SMART group visit provider through the MGH Benson-Henry Institute for Mind-Body Medicine and holds a 200-hour yoga teacher certification. Her research has earned multiple honors, including the HRSA Geriatric Academic Career Award, the Harvard Medical School Osher Center Pilot Research Award, an NIA-funded Boston Claude D. Pepper Older Americans Independence Center pilot award, and the Annals of Internal Medicine Early Career Investigator Award. Castle Connolly named her a Top Doctor in 2026 for the second consecutive year. Her clinical passions include healthy aging, gut health, sleep optimization, and nutritional biochemistry.
Education & Training
Undergraduate
Nutritional Biochemistry, UNC Chapel Hill
Residency
Internal Medicine, Brigham and Women's Hospital
Fellowship
Training at Osher Clinical Center for Integrative Health, Brigham and Women's Hospital
Additional Training
Osher Collaborative Faculty Fellow; 200-hour yoga teacher certification
Certifications
Conditions Treated
Who is Dr. Loewenthal right for?
Dr. Loewenthal is a strong fit for older adults who want comprehensive, relationship-driven geriatric care. Patients managing complex medication regimens or recovering after hospitalization benefit from her housecall program. Adults interested in gut health, sleep optimization, and integrative approaches find her clinical focus well-matched to their goals. Patients who value a physician grounded in both rigorous academic research and holistic medicine will feel at home in her care.
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Frequently Asked Questions
Dr. Loewenthal treats a broad range of conditions through her combined internal medicine and geriatric medicine training. Her clinical focus includes healthy aging, gut health, sleep disorders, and nutritional concerns. She also manages chronic disease, medication complexity, and post-hospital recovery, particularly for older adults.
Yes. Dr. Loewenthal directs the Lutanen Housecall Program. She provides comprehensive geriatric assessments, medication optimization, post-hospital follow-up, and care coordination in patients' homes. The program specifically serves older adults and patients with mobility limitations.
Dr. Loewenthal holds board certification in both Internal Medicine and Geriatric Medicine. She is also pursuing board certification in Integrative Medicine. She holds the designation of Osher Collaborative Faculty Fellow through the Osher Clinical Center at Brigham and Women's Hospital.
Dr. Loewenthal studied Nutritional Biochemistry at UNC Chapel Hill. She completed her Internal Medicine residency at Brigham and Women's Hospital and trained at the Osher Clinical Center for Integrative Health, also at Brigham and Women's Hospital.
Dr. Loewenthal serves as Assistant Professor of Medicine at Harvard Medical School. Her research has received multiple honors, including the HRSA Geriatric Academic Career Award, the Annals of Internal Medicine Early Career Investigator Award, and an NIA-funded pilot award through the Boston Claude D. Pepper Older Americans Independence Center.
Yes. Dr. Loewenthal serves as a SMART group visit provider through the MGH Benson-Henry Institute for Mind-Body Medicine. She also holds a 200-hour yoga teacher certification and integrates breathwork and stress management into her clinical approach.
Dr. Loewenthal is passionate about healthy aging, gut health, sleep optimization, and nutritional biochemistry. Her integrative medicine training shapes how she approaches preventive care and chronic disease management. She draws on both conventional medicine and evidence-based integrative therapies.
Yes. Castle Connolly named Dr. Loewenthal a Top Doctor in 2026 for the second consecutive year. Her research has earned several competitive honors, including the Harvard Medical School Osher Center Pilot Research Award and the Annals of Internal Medicine Early Career Investigator Award.
Doctor profile last updated March 21, 2026