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

Dr. Sean William Gallagher, MD

Individual provider Internal Medicine Physician · NPI 1477818250

Dr. Sean William Gallagher, MD practises Anesthesiology in Boston, Massachusetts. Graduated from Tufts University School of Medicine in 2012, 14 years ago. Practices with Pratt Anesthesiology Associates Inc, a 155-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
14
Trained at
Tufts University School of Medicine
Licensed in
MA
In the registry since
2012
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

800 Washington St
Boston, MA 02111-1552
Phone: (617) 636-5000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2100 Dorchester Ave, Dorchester, MA 02124-5615 — (617) 296-4000

Specialties & licences

Pediatric Anesthesiology Physician (primary) Taxonomy 207LP3000X · Licence 267497 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence FS2328169-469 (MA)

Record details

NPI number1477818250
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 9, 2012
Last updated in NPPESMarch 17, 2018

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice Pratt Anesthesiology Associates Inc — 155 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients114
Services billed 143 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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 Pratt Anesthesiology Associates Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 155 clinicians in the practice; 12 are shown here.

Other providers in Boston