Quick answers
- Which hospitals does Gretchen A. Gignac work at?
- Medicare's official clinician data lists Gretchen A. Gignac at 1 hospital: Boston Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gretchen A. Gignac see patients?
- Medicare's clinician data lists 3 practice locations, including Boston, MA. Call before your visit to confirm the address.
- What is Gretchen A. Gignac's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Gretchen A. Gignac accept Medicare assignment?
- Yes. Medicare's clinician data says Gretchen A. Gignac accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Gretchen A. Gignac offer telehealth?
- Medicare's clinician data says Gretchen A. Gignac offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gretchen A. Gignac?
- (617) 638-8000, as listed in official Medicare / NPI Registry data.
- What is Gretchen A. Gignac's NPI number?
- 1821288960. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gretchen A. Gignac works
Medicare's Facility Affiliation Data lists Gretchen A. Gignac at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Boston Medical CenterBoston, MA · Acute Care Hospital · CCN 220031
Practice locations
Addresses where Gretchen A. Gignac is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Boston Medical Ctr PlBoston, MA 02118 (617) 638‑8000
- 72 E Newton St, CR Evans 124Boston, MA 02118 (617) 638‑7253
- 88 E Newton StBoston, MA 02118 (617) 414‑5405
Group practices
Medicare enrollment lists Gretchen A. Gignac as a member of this group (CMS data updated 2026-10-02).
- Evans Medical Foundation Inc536 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821288960 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians