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

Dr. Stephen Killefer Allison, MD

Individual provider Diagnostic Radiology Physician · NPI 1508058280

Dr. Stephen Killefer Allison, MD is a Diagnostic Radiology in Seattle, Washington. Graduated from University of Southern California Keck School of Medicine in 2007, 19 years ago. Practices with Radia Inc P S, a 274-clinician group and accepts Medicare assignment. Licensed in California and Washington.

Years since qualifying
19
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA, WA
In the registry since
2007
Specialties on file
2
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

1959 NE Pacific St
Seattle, WA 98195-0001
Phone: (206) 543-3320
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 60270109 (WA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence A106737 (CA)

Record details

NPI number1508058280
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 15, 2007
Last updated in NPPESJuly 25, 2013

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Radia Inc P S — 274 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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