Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jack Greenan

Optometrist in Texarkana, TX · enumerated 2016.

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

National Provider Identifier

1639613979

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Registry record

Entity type Individual (Type 1)

Name Jack Greenan

Sex Male

Practice address 2703 Richmond Rd, Texarkana, TX, 75503

Phone (903) 838-0783

Enumeration date Dec 6, 2016

Last updated in NPPES Jun 3, 2019

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 9121T (TX) 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

Is NPI 1639613979 active?

Yes — as of the latest NPPES snapshot, NPI 1639613979 is active (record last updated 2019-06-03).

How do I verify Jack Greenan's NPI record?

Cross-check NPI 1639613979 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Texarkana Eye Associates Optometrist · Texarkana, TX NPI 1205909272 Thomas Dvorak Optometrist · Texarkana, TX NPI 1598899379 Nehad Virani Optometrist · Texarkana, TX NPI 1598107716 Texarkana Eye Associates Optometrist · Texarkana, TX NPI 1427413558 Priscilla Kier Optometrist · Texarkana, TX NPI 1134649015 Peter Bako Optometrist · Texarkana, TX NPI 1629590450 Med Southwest, Pllc Optometrist · Texarkana, TX NPI 1871059170 Katherine Mccracken Optometrist · Texarkana, TX NPI 1639731185

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-06-03.