Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William A Ernstein, OD

Individual provider Optometrist · NPI 1427133420

William A Ernstein, OD is an Optometrist in Palatine, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

251 E Northwest Hwy
Palatine, IL 60067-8114
Phone: (847) 358-4950
Fax: (847) 358-4990
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X (IL)

Record details

NPI number1427133420
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedOctober 26, 2006
Last updated in NPPESJuly 8, 2007
Mailing address251 E Northwest Hwy, Palatine, IL 60067-8114

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