John Gialousakis, O.D.
Optometrist · Downers Grove, IL
John Gialousakis, O.D. is an optometrist with a practice address in Downers Grove, Illinois, and NPI 1184038606, issued on Jun 12, 2014. Check the license (Illinois 046011186, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Gialousakis
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 046011186 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3450 Lacey RD, Downers Grove, IL 60515
- Phone
- (630) 743-4500
- Enumerated
- Jun 12, 2014
- Record last updated
- Jun 5, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (630) 743-4537
- Medicare enrollment
- Enrolled (PECOS I20181129001991); accepts Medicare assignment
- Medical or professional school
- State University Of New York - State College Optometry, 2014
- Entity
- Type 1 · individual
8 nearest optometrist records → All 2,697 in Illinois → Look up another NPI →
Also registered at 3450 Lacey RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aatifa Ahmed, CCC-SLP/LSpeech-Language Pathologist1770201378
- John Anderson, DDSDentist1134680101
- Dawn Arnashus, DDSGeneral Practice Dentistry1316166192
- Carrie Arroyo, MA CCC SLPSpeech-Language Pathologist1285799064
Verify John Gialousakis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 046011186Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $300.00
6 payments; by number, the most common kind was consulting fee; the largest payer was Johnson & Johnson Vision Care, Inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Midwestern UniversityDowners Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Gialousakis among 2,697 optometrist records in Illinois
John Gialousakis, O.D. is one of 2,697 optometrist records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 69% of them.
- NPI issued2014 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2014 · median 2008 among the 1,513 with a school on file
- Record last updated2019 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
71 optometrist records list a practice address in Downers Grove
They are 71 of the 1,899 NPPES records with a practice address in Downers Grove, and 2,697 optometrist records in Illinois.
All 2,697 in Illinois → Every provider in Downers Grove → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Glenn Afryl, O.D.Downers Grove, IL 605151447266929
- Michele Albanese, O.D.Downers Grove, IL 605151629149224
- Dianne Anderson, O.D.Downers Grove, IL 605151881766046
- Charles Faron, ODDowners Grove, IL 605151740265933
- Mark Jacquot, O.D.Downers Grove, IL 605151962562314
- Jeanie Lucy, ODDowners Grove, IL 605151578610465
- Michael Macek, ODDowners Grove, IL 605151376550061
- Patricia Moser, O.D.Downers Grove, IL 605151376603746
Common questions
What is John Gialousakis, O.D.'s NPI number?
John Gialousakis, O.D.'s National Provider Identifier (NPI) is 1184038606, issued on Jun 12, 2014. An NPI identifies a provider in billing; it is not a license.
Where is John Gialousakis, O.D. located?
The NPPES record lists a practice address at 3450 Lacey RD, Downers Grove, IL, 60515. Phone: (630) 743-4500. Providers update this record themselves, so call before visiting.
How can I verify John Gialousakis, O.D.'s license?
NPPES lists Illinois license number 046011186, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.