William A Ernstein, OD - Optometrist in Palatine, IL

William A Ernstein, OD is a Optometrist based in Palatine, Illinois. William A Ernstein is licensed to practice in Illinois (license number ) and his current practice location is 251 E Northwest Hwy, Palatine, Illinois. He can be reached at his office (for appointments etc.) via phone at (847) 358-4950.

NPI number for William A Ernstein is 1427133420 and his current mailing address is 251 E Northwest Hwy, Palatine, Illinois. He does not participate in medicare program and thus does not accept medicare assignments. His NPI Number is 1427133420.

Contact Information

William A Ernstein, OD
251 E Northwest Hwy,
Palatine, IL 60067-8114
(847) 358-4950
(847) 358-4990

Map and Direction




Healthcare Provider's Profile

Full NameWilliam A Ernstein
GenderMale
SpecialityOptometrist
Location251 E Northwest Hwy, Palatine, Illinois
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1427133420
  • Provider Enumeration Date: 10/26/2006
  • Last Update Date: 07/08/2007

Medical Identifiers

Medical identifiers for William A Ernstein such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1427133420NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
152W00000XOptometrist (Illinois)Primary

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William A Ernstein is NOT enrolled with medicare and thus cannot prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William A Ernstein, OD
251 E Northwest Hwy,
Palatine, IL 60067-8114

Ph: (847) 358-4950
William A Ernstein, OD
251 E Northwest Hwy,
Palatine, IL 60067-8114

Ph: (847) 358-4950

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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