Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. William V Slosson, ATC
Athletic Trainer in Lacey, WA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477673978
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Registry record
Entity type Individual (Type 1)
Name Mr. William V Slosson
Credential ATC
Sex Male
Practice address 350 River Ridge Dr Se, Lacey, WA, 98513
Phone (360) 412-4820
Enumeration date Mar 29, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers 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 is the NPI number for William Slosson?
The National Provider Identifier (NPI) for William Slosson is 1477673978, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Slosson practice?
The practice location on file with NPPES is in Lacey, WA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.