DR. STEPHEN KILLEFER ALLISON M.D.
NPI 1508058280
Radiology - Diagnostic Radiology in Seattle, WA
About Dr. Stephen Killefer Allison M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHEN KILLEFER ALLISON M.D. (NPI 1508058280) is an individual diagnostic radiology provider in Seattle, Washington, licensed in Washington (60270109) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and is a graduate of University Of Southern California Keck School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Stephen Killefer Allison M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Stephen Allison reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98109
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 clinicians in this Medicare group
Lynnwood, WA 98036
- Reassigned Medicare billing, Washington enrollment
- 209 clinicians in this Medicare group
Olympia, WA 98506
- Reassigned Medicare billing, Washington enrollment
- 186 clinicians in this Medicare group
Wenatchee, WA 98801
- Reassigned Medicare billing, Washington enrollment
- 651 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Washington Medical Ctr
Acute Care Hospitals · Seattle, WAConfluence Health Hospital
Acute Care Hospitals · Wenatchee, WAProvidence St Peter Hospital
Acute Care Hospitals · Olympia, WAPeacehealth Southwest Medical Center
Acute Care Hospitals · Vancouver, WALegacy Salmon Creek Medical Center
Acute Care Hospitals · Vancouver, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98195 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SEATTLE, WA 98195
SEATTLE, WA 98195
SEATTLE, WA 98195
SEATTLE, WA 98195
SEATTLE, WA 98195
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Stephen Allison's NPI number?
The NPI number for Stephen Allison is 1508058280. It was assigned to this individual provider in the NPPES registry on August 15, 2007.
Where is Stephen Allison located?
Stephen Allison practices at 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 543-3320.
What is Stephen Allison's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Stephen Allison enrolled in Medicare?
Yes. Stephen Allison is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Stephen Allison's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Allison reassigns Medicare benefits to 5 organizations: Kaiser Foundation Health Plan Of Washington (Seattle, WA), The Association Of University Physicians (Seattle, WA), Radia Inc P S (Lynnwood, WA), South Sound Radiologists Inc P S (Olympia, WA) and Central Washington Health Services Association (Wenatchee, WA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Allison's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Allison accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Stephen Allison as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Stephen Allison affiliated with any hospitals?
According to CMS data, Stephen Allison is affiliated with University Of Washington Medical Ctr, Confluence Health Hospital, Providence St Peter Hospital, Peacehealth Southwest Medical Center and Legacy Salmon Creek Medical Center.
When was this NPI record last updated?
The NPPES record for Stephen Allison was last updated on July 25, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Stephen Killefer Allison, M.D. · NPI 1508058280
Diagnostic Radiology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since August 15, 2007.
## Identity
- **NPI:** 1508058280 (Entity type: Individual)
- **Enumerated:** August 15, 2007
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 60270109 (Washington)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1959 NE PACIFIC ST, Seattle, WA 98195-0001
- **Phone:** (206) 543-3320
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Kaiser Foundation Health Plan Of Washington (NPI 1396810701, Seattle, WA); The Association Of University Physicians (NPI 1023041159, Seattle, WA); Radia Inc P S (NPI 1700045572, Lynnwood, WA); South Sound Radiologists Inc P S (NPI 1902990500, Olympia, WA); Central Washington Health Services Association (NPI 1801937453, Wenatchee, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** July 25, 2013
- **Other identifiers:** Medicaid 1508058280 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1508058280) · Data from the CMS NPPES public registry.