Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Gretchen Ann Gignac, MD

Individual provider Internal Medicine Physician · NPI 1821288960

Dr. Gretchen Ann Gignac, MD practises Hematology/Oncology in Boston, Massachusetts. Graduated from Perelman School of Med at the University of Pennsylvania in 2001, 25 years ago. Practices with Evans Medical Foundation Inc, a 526-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
25
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
MA
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

830 Harrison Avenue Moakley 3rd Fl
Boston, MA 02118-2905 Not confirmed with CMS for 12 years — call before visiting
Phone: (617) 638-6428
Fax: (617) 638-5756
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 232079 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 232079 (MA)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 232079 (MA)

Record details

NPI number1821288960
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2007
Last updated in NPPESJune 5, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 2001 (25 years in practice)
Group practice Evans Medical Foundation Inc — 526 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients134
Services billed 390 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Evans Medical Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 526 clinicians in the practice; 12 are shown here.

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