Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Michael Pasiechnik

Peer Specialist in Prineville, OR · enumerated 2023 · practices at Best Care Treatment Services.

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

National Provider Identifier

1639952351

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Registry record

Entity type Individual (Type 1)

Name William Michael Pasiechnik

Sex Male

Practice address 1059 Nw Madras Hwy, Prineville, OR, 97754

Phone (541) 323-5330

Enumeration date Aug 16, 2023

Last updated in NPPES Aug 16, 2023

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers 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

Where does William Pasiechnik practice?

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

What is the NPI number for William Pasiechnik?

The National Provider Identifier (NPI) for William Pasiechnik is 1639952351, 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 2023-08-16.