NPI Portal NPI Lookup & Verification

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

Mary Ploehn-Brown, LICENSED OPTICIAN

Optician in Watertown, NY · enumerated 2024 · practices at Wal-Mart Stores East Lp.

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

National Provider Identifier

1639996747

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Registry record

Entity type Individual (Type 1)
Name Mary Ploehn-Brown
Credential LICENSED OPTICIAN
Sex Female
Practice address Watertown, NY, 13601
Phone (315) 788-1570
Fax (315) 788-0910
Enumeration date Sep 21, 2024
Last updated in NPPES Sep 21, 2024

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

Taxonomy & licenses

156FX1800X Optician Eye and Vision Services Providers · License 5930 (NY) 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 Mary Ploehn-Brown practice?
The practice location on file with NPPES is in Watertown, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Ploehn-Brown?
The National Provider Identifier (NPI) for Mary Ploehn-Brown is 1639996747, 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 2024-09-21.