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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lois Kim Hargreaves, P.T.

Neurology Physical Therapist in Mill Valley, CA · enumerated 2011 · practices at Marsha J. Bluto, M.D., A Professional Corporation.

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

National Provider Identifier

1598034399

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Registry record

Entity type Individual (Type 1)
Name Lois Kim Hargreaves
Credential P.T.
Sex Female
Practice address Mill Valley, CA, 94941
Phone (415) 381-9030
Enumeration date Dec 22, 2011
Last updated in NPPES Dec 22, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2251N0400X Neurology Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT15341 (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.

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Frequently asked questions

Where does Lois Hargreaves practice?
The practice location on file with NPPES is in Mill Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lois Hargreaves?
The National Provider Identifier (NPI) for Lois Hargreaves is 1598034399, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-22.