Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William James Marlow, LDO

Optician in Niagara Falls, NY · enumerated 2018 · practices at Wal-Mart Stores East Lp.

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

National Provider Identifier

1023525516

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Registry record

Entity type Individual (Type 1)

Name Mr. William James Marlow

Credential LDO

Sex Male

Practice address 1540 Military Rd, Niagara Falls, NY, 14304

Phone (716) 298-5174

Fax (716) 298-5176

Enumeration date Jan 5, 2018

Last updated in NPPES Jan 5, 2018

Taxonomy & licenses

156FX1800X Optician Eye and Vision Services Providers · License 006031 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Marlow?

The National Provider Identifier (NPI) for William Marlow is 1023525516, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Marlow practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-05.