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WILLIAM A ERNSTEIN O.D.
NPI 1427133420
Optometrist in Palatine, IL

Active since October 26, 2006
251 E NORTHWEST HWY, PALATINE, IL 60067(847) 358-4950(847) 358-4990 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About William A Ernstein O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM A ERNSTEIN O.D. (NPI 1427133420) is an individual optometrist in Palatine, Illinois and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1427133420
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameWILLIAM A ERNSTEINCredential: O.D.
Location Address251 E NORTHWEST HWYPalatine, IL 60067-8114
Mailing Address251 E Northwest HwyPalatine, IL 60067-8114 · (847) 358-4950 · Fax (847) 358-4990
Phone(847) 358-4950
Fax(847) 358-4990
Sole ProprietorNo
Enumeration DateOctober 26, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1427133420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
251 E NORTHWEST HWY, Palatine, IL 60067
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Other Identifiers 1

Medicare UPINT36708IL

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Ernstein's NPI number?

The NPI number for William Ernstein is 1427133420. It was assigned to this individual provider in the NPPES registry on October 26, 2006.

Where is William Ernstein located?

William Ernstein practices at 251 E Northwest Hwy, Palatine, IL 60067. The listed phone number is (847) 358-4950.

What is William Ernstein's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for William Ernstein was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.