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

Mr. Llewellyn Thompson III, PTA

Physical Therapy Assistant in South San Francisco, CA · enumerated 2015.

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

National Provider Identifier

1770961856

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Registry record

Entity type Individual (Type 1)

Name Mr. Llewellyn Thompson III

Credential PTA

Sex Male

Practice address South San Francisco, CA, 94080

Phone (866) 758-4700

Fax (866) 758-4711

Enumeration date May 11, 2015

Last updated in NPPES May 11, 2015

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

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 9680 (CA) 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.

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Frequently asked questions

How do I verify Llewellyn Thompson's NPI record?

Cross-check NPI 1770961856 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770961856 active?

Yes, as of the latest NPPES snapshot, NPI 1770961856 is active (record last updated 2015-05-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-11.