Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Robertus Hendrikus Sier, PT
Physical Therapist in Dearborn, MI · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1609376342
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Registry record
Entity type Individual (Type 1)
Name Robertus Hendrikus Sier
Credential PT
Sex Male
Practice address 17101 Rotunda Dr, Dearborn, MI, 48124
Phone (313) 791-4333
Enumeration date Feb 20, 2018
Last updated in NPPES Feb 20, 2018
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5501004609 (MI) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT credential
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 Robertus Sier?
The National Provider Identifier (NPI) for Robertus Sier is 1609376342, a Type 1 (individual) record in the CMS NPPES registry.
Where does Robertus Sier practice?
The practice location on file with NPPES is in Dearborn, MI. 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 2018-02-20.