Clinical Interests
  • Pituitary disease
  • Adrenal disorders
  • Endocrine disorders in HIV
Medical Education
  • MD, Columbia University College of Physicians and Surgeons
  • Residency, New York Presbyterian Hospital
  • Fellowship, Massachusetts General Hospital
Board Certifications
  • Endocrinology
  • Diabetes & Metabolism
Foreign Languages
  • Mandarin Chinese
  • Taiwanese
  • Boston: Massachusetts General Hospital
Insurances Accepted
  • Aetna Health Inc.
  • AllWays Health (NHP) - ACD
  • AllWays Health (NHP) - PBO
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • BMC HealthNet Mass Health MCO/ACO
  • Cigna (PAL #'s)
  • Commonwealth Care Alliance
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - ACD
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • MassHealth
  • Medicare
  • Medicare - ACD
  • OSW - Maine
  • OSW - New Hampshire
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Railroad Medicare - ACD
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO
  • Well Sense Pediatrics

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Provider Gender


Janet Lo, M.D., M.MSc. is a clinician in the Neuroendocrine Clinical Center and a faculty member in the Neuroendocrine Unit at the Massachusetts General Hospital, and an Assistant Professor of Medicine at Harvard Medical School.  She is a clinical researcher who studies endocrine disease, cardiovascular disease and inflammation. She is also a clinician with a focus on pituitary disease and other endocrine diseases.  Awards in recognition of her work have included the MGH Claflin Award and NIH Career Development Award. She is the Principal Investigator of a NIH Research Project Grant (RO1) and is an author of more than 32 peer-reviewed publications.

Research & Publications


View my most recent publications at PubMed

Lo J, You S, Canavan B, Liebau J, Beltrani G, Koutkia P, Hemphill L, Lee H, Grinspoon S. Low Dose Physiologic Growth Hormone in HIV Patients with Abdominal Fat Accumulation: A Randomized Controlled Trial. JAMA 300(5): 509-519, 2008.

Nachtigall LB, Valassi E, Lo J, McCarty D, Passeri J, Biller BM, Miller KK, Utz A, Grinspoon S, Lawson EA, Klibanski A.  Gender Effects on Cardiac Valvular Function in Hyperprolactinaemic Patients Receiving Cabergoline: a Retrospective Study. Clinical Endocrinology 2009.

Korner J, Lo J, Freda P, Wardlaw S, Treatment with Cabergoline is associated with weight loss in patients with hyperprolactinemia. Obesity Research. 2003;11(2):311-312.

Lo J, Abbara S, Shturman L, Soni A, Rocha-Filho J, Wei J, Nasir K, Grinspoon S. Increased Prevalence of Subclinical Coronary Atherosclerosis Detected by Coronary Computed Tomography Angiography in HIV-Infected Men. AIDS 24(2):243-53, 2010.

News & Events


Neuroendocrine and Pituitary Tumor Clinical Center
55 Fruit Street
Cox 140
Boston, MA 02114-2696
Phone: 617-726-7948