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

Barry Alan Aaronson, MD

Individual provider Internal Medicine Physician · NPI 1952418345

Barry Alan Aaronson, MD is a Hospitalist in Seattle, Washington. Graduated from George Washington University School of Medicine in 1991, 35 years ago. Practices with Franciscan Medical Group, a 1,417-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
35
Trained at
George Washington University School of Medicine
Licensed in
WA
In the registry since
2006
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

1100 9th Ave
Seattle, WA 98101-2756 Not confirmed with CMS for 16 years — call before visiting
Phone: (206) 223-6600
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

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence MD00034931 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD00034931 (WA)

Record details

NPI number1952418345
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2006
Last updated in NPPESMay 7, 2010

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1991 (35 years in practice)
Group practice Franciscan Medical Group — 1417 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients148
Services billed 157 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.

Colleagues at Franciscan Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1417 clinicians in the practice; 12 are shown here.

Other providers in Seattle