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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald E. Greenspan, O.D.

Optometrist in Chicago Heights, IL · enumerated 2005.

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

National Provider Identifier

1194714121

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Registry record

Entity type Individual (Type 1)
Name Dr. Ronald E. Greenspan
Credential O.D.
Sex Male
Practice address 366 Dixie Hwy, Chicago Heights, IL, 60411
Phone (708) 754-0080
Fax (708) 754-0089
Enumeration date Oct 21, 2005
Last updated in NPPES Nov 14, 2008

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 046006461 (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
046006461 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1194714121 active?
Yes, as of the latest NPPES snapshot, NPI 1194714121 is active (record last updated 2008-11-14).
How do I verify Ronald Greenspan's NPI record?
Cross-check NPI 1194714121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-11-14.