Massachusetts General Hospital

Hematology (Core Lab)



Location: Gray 5
Phone: 617-643-0340
Fax: 617-724-3788

Medical Director: Abner Louissaint, M.D., Ph.D.
Phone: 617-643-9727

Technical Director: Jennifer Hiers
Phone: 617-726-3609


Day Shift:
Ryan Mize Phone: 617-724-4538
Li Yamagata Phone: 617-643-8944
Amy Zani Phone: 617-643-8936

Evening Shift:
Charles Serrano Phone: 617-726-2517


Critical Values

Critical values are called to the ordering location or physician in accordance with the MGH Critical Values policy.

Criteria for Specimen Refusal

  • Specimen not labeled with patient’s name and unit number
  • Name on specimen and requisition do not agree
  • Specimen is more than 24 hours old
  • Quantity not sufficient (QNS) for testing
  • Specimen unsuitable for testing
  • Improperly sealed or leaking container
  • Two different patients received in one specimen bag