Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathryn Duffey
Physical Therapist in Clarkston, MI · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659569846
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Registry record
Entity type Individual (Type 1)
Name Kathryn Duffey
Sex Female
Practice address 5701 Bow Pointe Dr, Suite 300, Clarkston, MI, 48346
Phone (248) 620-5688
Enumeration date Oct 12, 2007
Last updated in NPPES Oct 9, 2014
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5501012914 (MI) 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 Kathryn Duffey?
The National Provider Identifier (NPI) for Kathryn Duffey is 1659569846, a Type 1 (individual) record in the CMS NPPES registry.
Where does Kathryn Duffey practice?
The practice location on file with NPPES is in Clarkston, MI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Timothy Oneill Family Medicine Physician · Clarkston, MI NPI 1033117890 Dawn Turner Emergency Medicine Physician · Clarkston, MI NPI 1588662340 David Thomas Emergency Medicine Physician · Clarkston, MI NPI 1942208772 Shivajee Nallamothu Orthopaedic Surgery Physician · Clarkston, MI NPI 1720058100 Michigan Center for Orthopedic Surgery Plc Orthopaedic Surgery Physician · Clarkston, MI NPI 1447222468 Eugene Sullivan Physician Assistant · Clarkston, MI NPI 1245208883 Endoscopic Solutions PC Gastroenterology Physician · Clarkston, MI NPI 1164460085 Scott Simecek Pulmonary Disease Physician · Clarkston, MI NPI 1104865765
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-10-09.