Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jason T Greyslak, DMD, MS

Dentist in Hermiston, OR · enumerated 2014.

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

National Provider Identifier

1417358961

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Registry record

Entity type Individual (Type 1)

Name Dr. Jason T Greyslak

Credential DMD, MS

Sex Male

Practice address 1050 W Elm Ave, Suite 230, Hermiston, OR, 97838

Phone (888) 468-0022

Fax (541) 504-3907

Enumeration date Sep 15, 2014

Last updated in NPPES Jan 22, 2015

Taxonomy & licenses

122300000X Dentist Dental Providers · License D10127 (OR) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1417358961 active?

Yes, as of the latest NPPES snapshot, NPI 1417358961 is active (record last updated 2015-01-22).

How do I verify Jason Greyslak's NPI record?

Cross-check NPI 1417358961 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-22.