Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Stephen Younkin
Registered Nurse in Oak Ridge, TN · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639649858
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Registry record
Entity type Individual (Type 1)
Name Stephen Younkin
Sex Male
Practice address 110 Hendrix Dr, Oak Ridge, TN, 37830
Phone (865) 661-2286
Enumeration date Nov 30, 2018
Last updated in NPPES Nov 30, 2018
Taxonomy & licenses
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 Stephen Younkin?
The National Provider Identifier (NPI) for Stephen Younkin is 1639649858, a Type 1 (individual) record in the CMS NPPES registry.
Where does Stephen Younkin practice?
The practice location on file with NPPES is in Oak Ridge, TN. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-30.