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

Dr. Jeffrey Michael Leinassar, DMD

General Practice Dentistry in Astoria, OR · enumerated 2005.

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

National Provider Identifier

1184623852

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey Michael Leinassar

Credential DMD

Sex Male

Practice address Astoria, OR, 97103

Phone (503) 325-0310

Fax (503) 325-1513

Enumeration date Jul 15, 2005

Last updated in NPPES Jun 5, 2012

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License D5069 (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

What is the NPI number for Jeffrey Leinassar?

The National Provider Identifier (NPI) for Jeffrey Leinassar is 1184623852, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jeffrey Leinassar practice?

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

Other providers at this practice address

Browse all →

Dennis Klemp General Practice Dentistry · Astoria, OR NPI 1417956194 Jacob Bushnell General Practice Dentistry · Astoria, OR NPI 1811401441

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-05.