NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Joan Kathleen Denzler, P.T.

Physical Therapist in San Leandro, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1891859807

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Joan Kathleen Denzler
Credential P.T.
Sex Female
Practice address Alameda County Medical Center - Fairmont Campus, 15400 Foothill Blvd, San Leandro, CA, 94578
Phone (510) 895-4513
Enumeration date Dec 21, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 10626 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Joan Denzler practice?
The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Joan Denzler?
The National Provider Identifier (NPI) for Joan Denzler is 1891859807, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.