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

Dr. Gregory David Strong, O.D.

Optometrist in Glen Burnie, MD · enumerated 2006.

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

National Provider Identifier

1851488951

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory David Strong

Credential O.D.

Sex Male

Practice address Glen Burnie, MD, 21061

Phone (410) 969-0705

Fax (410) 969-0718

Enumeration date Oct 9, 2006

Last updated in NPPES Jul 21, 2022

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License TA-1904 (MD) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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

Where does Gregory Strong practice?

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

What is the NPI number for Gregory Strong?

The National Provider Identifier (NPI) for Gregory Strong is 1851488951, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.