Centers & Specialties

Cancer Center

Clinical Interests
  • Myeloproliferative neoplasms
  • Leukemia
  • Myelofibrosis
  • Essential thrombocytosis
  • Polycythemia vera
Medical Education
  • MD, Mount Sinai School of Medicine
  • Residency, Brigham and Women's Hospital
  • Fellowship, Memorial Sloan Kettering Cancer Center
Board Certifications
  • Internal Medicine
  • Hematology
  • Medical Oncology
Foreign Languages
  • Spanish
  • Boston: Massachusetts General Hospital
  • Waltham: Mass General Waltham
Existing Patients
Patient Gateway
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 - Connecticut
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • Private Health Care Systems (PHCS)
  • 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


I am a hematology-oncology physician who specializes in the care of patients with myeloproliferative neoplasms (MPN), chronic myeloid leukemia and leukemia. I am an active clinical researcher and lead the MPN research program at MGH; I lead several clinical trials and participate in translational research for MPN  . In addition, I am the clinical director for the adult leukemia service at MGH.  

In addition, I strive to provide compassionate care for each patient and his or her family and to tailor therapy to meet each patient's individual needs. 

I grew up in Mexico city and I am fluent in Spanish, I welcome takng care of patients that speak primarily Spanish. 

Research & Publications


View my most recent publications at PubMed

Hobbs GS, Hanasoge Somasundara AV, Kleppe M, Litvin R, Arcila M, Ahn J, Mckenney AS, Knapp K, Ptashkin R, Weinstein H, Heinemann MH, Francis J, Chanel S, Berman E, Mauro M, Tallman MS, Heaney ML, Levine RL, Rampal RK. Hsp90 inhibition disrupts JAK-STAT signaling and leads to reductions in splenomegaly in patients with MPNs. Haematologica. 2017 Oct 19.

Hobbs GS, Rozelle S, Mullally A. The Development and Use of Janus Kinase 2 Inhibitors for the Treatment of Myeloproliferative Neoplasms. Hematol Oncol Clin North Am. 2017 Aug;31(4):613-626. doi: 10.1016/j.hoc.2017.04.002. Epub 2017 May 17. Review. 

Hobbs GS, Rampal RK. Clinical and molecular genetic characterization of myelofibrosis. Curr Opin Hematol. 2015 Mar;22(2):177-83. 

Hobbs, G*., Hamdi*, A., Hilden, P., Goldberg, J,  Poon, M., Ledesma, M., Devlin, S., Rondon, G.. Papadopoulos, E., Jakubowski, A.,  O'Reilly, R., Champlin, R., Giralt, S., Perales, M*, Kebriaei, P*. Outcomes in Patients with Acute Lymphoblastic Leukemia in First or Second Complete Remission Receiving Ex-Vivo T-Cell Depleted or Unmodified Allografts: Comparison of Results at Two Institutions. Bone Marrow Transplant, January, 26, 2015.

Hobbs, G.S., Landrum, M.B., Arora, N.K., Ganz, P.A., van Ryn, M., Weeks, J.C., Mack, J.M., Keating, N.L. The Role of Families in Decisions Regarding Cancer Treatments. Cancer, in press.






55 Fruit Street
Boston, MA 02114-2696
Phone: 617-724-3456
Fax: 617-724-2525
Hematology/Oncology Leukemia Program
100 Blossom Street
Boston, MA 02114-2606
Phone: 617-724-3456
Fax: 617-724-1126