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

Mark Yost

Optometrist in Tigard, OR · enumerated 2022 · practices at Converge Neuro Optometry LLC.

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

National Provider Identifier

1821713645

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Registry record

Entity type Individual (Type 1)
Name Mark Yost
Sex Male
Practice address Tigard, OR, 97223
Phone (503) 906-3596
Fax (503) 906-1014
Enumeration date Oct 4, 2022
Last updated in NPPES Jun 11, 2024

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

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
152W00000X Optometrist Eye and Vision Services Providers · License 44277 (OR) 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 Mark Yost practice?
The practice location on file with NPPES is in Tigard, OR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Yost?
The National Provider Identifier (NPI) for Mark Yost is 1821713645, 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 2024-06-11.