WILLIAM A ERNSTEIN (O.D.) – Optometrist, NPI 1427133420

WILLIAM A ERNSTEIN (O.D.) is a healthcare provider. based in Palatine, Illinois. specializing in Optometrist. They hold the professional credentials O.D.. The NPI Number for WILLIAM A ERNSTEIN (O.D.) is 1427133420

Main info

Male
Name
WILLIAM A ERNSTEIN (O.D.)
NPI
1427133420
Phone
(847) 358-4950
Address
251 E NORTHWEST HWY
Enumeration Date
26 October 2006
Last Update Date
8 July 2007
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience43
Completeness75
Years active:19State licenses:0Digital endpointsOther names

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Provider Addresses for WILLIAM A ERNSTEIN (O.D.)

  • 251, East Northwest Highway, Palatine, Palatine Township, Cook County, Illinois, 60067, United States

    PALATINE, IL 600678114

    Phone: (847) 358-4950

    Fax: (847) 358-4990

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 60067)

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Reviews

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Frequently asked questions

What is the 10-digit NPI for WILLIAM A ERNSTEIN (O.D.)?
WILLIAM A ERNSTEIN (O.D.) — NPI 1427133420 — is the standard way to identify this listing.
Is WILLIAM A ERNSTEIN (O.D.) still practicing?
WILLIAM A ERNSTEIN (O.D.) is currently listed as active in the public NPI registry.
What taxonomy line describes WILLIAM A ERNSTEIN (O.D.)?
For research purposes, treat WILLIAM A ERNSTEIN (O.D.) as Optometrist in this dataset. Clinical services aligned with this taxonomy classification.
Does WILLIAM A ERNSTEIN (O.D.) list a practice location?
Patients near Palatine, Illinois may find WILLIAM A ERNSTEIN (O.D.) in results; validate coverage separately.
How many locations tie to this NPI?
2 practice locations appear in the available data.

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