NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert L. Davis, O.D.

Optometrist in Oak Lawn, IL · enumerated 2006 · practices at Harold E Davis & Terry Alan Trust Etal.

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

National Provider Identifier

1275513509

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Registry record

Entity type Individual (Type 1)
Name Dr. Robert L. Davis
Credential O.D.
Sex Male
Practice address 4663 W 95th St, Oak Lawn, IL, 60453
Phone (708) 636-0600
Fax (708) 636-0606
Enumeration date Jan 20, 2006
Last updated in NPPES Jul 1, 2025

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 046007176 (IL) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
1265621361 Other IL GROUP NPI NUMBER
506370 Other IL MEDICARE GROUP NUMBER
046007173 Medicaid IL -

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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Robert Davis?
Robert Davis is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-01.