Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Aaron J Eusterbrock, PA-C
Physician Assistant in Seattle, WA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1407100878
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Registry record
Entity type Individual (Type 1)
Name Aaron J Eusterbrock
Credential PA-C
Sex Male
Practice address 908 Jefferson St, Seattle, WA, 98104
Phone (206) 543-6420
Enumeration date Nov 6, 2012
Last updated in NPPES Nov 6, 2012
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA60316873 (WA) Primary
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Aaron Eusterbrock?
Aaron Eusterbrock is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-06.