Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lydia M Greenwalt, PT

Physical Therapist in Silverdale, WA · enumerated 2010.

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

National Provider Identifier

1871802462

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Registry record

Entity type Individual (Type 1)

Name Lydia M Greenwalt

Credential PT

Sex Female

Practice address 9621 Ridgetop Blvd Nw, Silverdale, WA, 98383

Phone (360) 782-3300

Enumeration date Sep 29, 2010

Last updated in NPPES Jan 21, 2011

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

Other identifiers

Identifier	Type	State	Issuer
272122	Other	WA	LABOR & INDUSTRIES

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

What is the NPI number for Lydia Greenwalt?

The National Provider Identifier (NPI) for Lydia Greenwalt is 1871802462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Lydia Greenwalt practice?

The practice location on file with NPPES is in Silverdale, WA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-21.