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

William G Callahan, MD

Individual provider Sports Medicine (Family Medicine) Physician · NPI 1396858718

William G Callahan, MD is a Sports Medicine in Federal Way, Washington. Graduated from University of Virginia School of Medicine in 2004, 22 years ago. Practices with Virginia Mason Medical Center, a 867-clinician group and accepts Medicare assignment. Licensed in California and Washington.

Years since qualifying
22
Trained at
University of Virginia School of Medicine
Licensed in
CA, 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 →

Practice location Address checks out

33501 1st Way S
Federal Way, WA 98003-6208
Phone: (253) 874-1668
Show map & directions

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

Specialties & licences

Sports Medicine (Family Medicine) Physician (primary) Taxonomy 207QS0010X · Licence MD60027229 (WA)
Sports Medicine (Family Medicine) Physician Taxonomy 207QS0010X · Licence A100584 (CA)

Record details

NPI number1396858718
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 17, 2006
Last updated in NPPESSeptember 9, 2009
Mailing address33501 1st Way S, Federal Way, WA 98003-6208

Medicare enrollment

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

Medicare specialtySPORTS MEDICINE
Also practisesFAMILY PRACTICE
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Virginia Mason Medical Center — 867 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare