Gretchen Ann Gignac MD

Assistant Professor, Medicine, Boston University School of Medicine

830 Harrison AvenueMoakley, 3rd FloorBoston, MA 02118
Phone+1 617-638-6428
Fax+1 617-638-5756

Dr. Gignac is on Doximity

As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.

Gain access to free telehealth tools, such as our “call shielding” and one-way patient texting.
Connect with colleagues in the same hospital or clinic.
Read the latest clinical news, personalized to your specialty.

See Dr. Gignac's full profile Already have an account?

Education & Training

Memorial Sloan Kettering Cancer CenterFellowship, Hematology and Medical Oncology, 2004 - 2007
University of Pennsylvania Health SystemResidency, Internal Medicine, 2001 - 2004
Perelman School of Medicine at the University of PennsylvaniaClass of 2001

The following disclaimer is related to board certifications obtained from ABMS®, denoted by the ABMS® logo.

This information is proprietary data maintained in a copyrighted database owned by the American Board of Medical Specialties®. The display and presence of ABMS Data in no way constitutes any affiliation, association with, or endorsement of any advertising, promotion, or sponsorship by ABMS and its affiliates and subsidiaries, the ABMS Member Boards, or ABMS board certified physicians and medical specialists. Copyright 2026 American Board of Medical Specialties®. All rights reserved.

The user is responsible for ensuring that the profile obtained in this directory is the profile of the physician or medical specialist being sought.

A self-designated specialty, subspecialty, or practice area neither implies nor is equivalent to ABMS board certification or the existence of specialized training by or competence of a physician or medical specialist.

Certifications & Licensure

MA State Medical License 2007 - 2027
NY State Medical License 2004 - 2007
PA State Medical License 2001 - 2004
American Board of Internal Medicine Internal Medicine
American Board of Internal Medicine Hematology
American Board of Internal Medicine Medical Oncology

Awards, Honors, & Recognition

Regional Top Doctor Castle Connolly, 2014

Clinical Trials

S1216, Phase III ADT+TAK-700 vs. ADT+Bicalutamide for Metastatic Prostate Cancer Start of enrollment: 2013 Mar 08
COMPLETED
PHASE3

Publications & Presentations

PubMed

2 citations
Perceptions and Use of Germline Genetic Testing Among Patients With Prostate Cancer.
Laura B Beidler, Kimberly Zayhowski, Mary Nahorniak, Stephanie Loo, Gretchen A Gignac
JCO Oncology Practice. 2025-10-01
1 citations
A qualitative study of the experiences of patients with prostate cancer when receiving negative genetic results: "I still don't have a grasp of what it all means".
Kimberly Zayhowski, Catharine Wang, Mary Nahorniak, Stephanie Loo, Gretchen Gignac
Journal of Genetic Counseling. 2025-06-01
2 citations
Enfortumab-vedotin use for urothelial carcinoma in two patients on hemodialysis.
Harshit Khosla, Sita Bhatt, Ming-Jin Wang, Gretchen Gignac, Kriti Mittal
Journal of Oncology Pharmacy Practice. 2024-07-01