Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Lydia Hamstra, DPT
Physical Therapist in Berkeley, CA · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164986915
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Registry record
Entity type Individual (Type 1)
Name Lydia Hamstra
Credential DPT
Sex Female
Practice address 2850 Seventh St Ste 100, Berkeley, CA, 94710
Phone (510) 845-5170
Fax (510) 845-5173
Enumeration date Jan 25, 2019
Last updated in NPPES Nov 4, 2019
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 295711 (CA) Primary
DPT — Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession.
About the DPT 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
Where does Lydia Hamstra practice?
The practice location on file with NPPES is in Berkeley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lydia Hamstra?
The National Provider Identifier (NPI) for Lydia Hamstra is 1164986915, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Regalado Reyes Chiropractor · Berkeley, CA NPI 1053659136 Nirmal Gurung Physical Therapy Assistant · Berkeley, CA NPI 1336577600 Kevin Houlihan Physical Therapy Assistant · Berkeley, CA NPI 1174023378 American Current Care of California, A Medical Corporation Urgent Care Clinic/Center · Berkeley, CA NPI 1033685698 Occupational Health Centers of California, A Medical Corporation Occupational Medicine Clinic/Center · Berkeley, CA NPI 1851867428 Wesley Ko Physical Therapist · Berkeley, CA NPI 1669077137
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-04.