Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Clark Treece, OTRL

Hand Occupational Therapist in Silverdale, WA · enumerated 2007.

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

National Provider Identifier

1619186525

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Registry record

Entity type Individual (Type 1)

Name Gregory Clark Treece

Credential OTRL

Sex Male

Practice address 2200 Nw Myhre Rd, Silverdale, WA, 98383

Phone (360) 830-1321

Fax (360) 830-1380

Enumeration date May 21, 2007

Last updated in NPPES Sep 25, 2019

Taxonomy & licenses

225XH1200X Hand Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License OT60449745 (WA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Gregory Treece practice?

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

What is the NPI number for Gregory Treece?

The National Provider Identifier (NPI) for Gregory Treece is 1619186525, 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 2019-09-25.