Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alexander Jacob Sironen
Physical Therapist in Denver, CO · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1952255705
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Registry record
Entity type Individual (Type 1)
Name Alexander Jacob Sironen
Sex Male
Practice address 8580 E Lowry Blvd, Denver, CO, 80230
Phone (303) 547-9310
Enumeration date Feb 26, 2026
Last updated in NPPES Feb 26, 2026
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 0021145 (CO) 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
Where does Alexander Sironen practice?
The practice location on file with NPPES is in Denver, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alexander Sironen?
The National Provider Identifier (NPI) for Alexander Sironen is 1952255705, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-26.