Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Katharine Ewall

Individual provider Internal Medicine Physician · NPI 1922217751

Katharine Ewall is a Hospitalist in Northampton, Massachusetts. Graduated from Tufts University School of Medicine in 2007, 19 years ago. Practices with Mass General Brigham Medical Group Western Massachusetts Inc, a 293-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
19
Trained at
Tufts University School of Medicine
Licensed in
MA
In the registry since
2007
Specialties on file
3
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Practice location Address checks out

30 Locust St
Northampton, MA 01060-2052 Not confirmed with CMS for 10 years — call before visiting
Phone: (413) 582-2792
Fax: (413) 582-4675
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 247001 (MA)
Pediatrics Physician Taxonomy 208000000X · Licence 247001 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 247001 (MA)

Record details

NPI number1922217751
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedMay 21, 2007
Last updated in NPPESNovember 1, 2016

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesADDICTION MEDICINE, INTERNAL MEDICINE, PEDIATRIC MEDICINE
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Mass General Brigham Medical Group Western Massachusetts Inc — 293 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 patients216
Services billed 237 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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. Those with a page here are linked.

  • Baystate Medical Center Hospital · Springfield, MA · listed as Baystate Medical Center Inc
  • Cooley Dickinson Hospital Inc,The Hospital · Northampton, MA

Colleagues at Mass General Brigham Medical Group Western Massachusetts Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 293 clinicians in the practice; 12 are shown here.

Other providers in Northampton