John Peter Czaja, O.D.
Optometrist · Merrillville, IN
John Peter Czaja, O.D. is an optometrist with a practice address in Merrillville, Indiana, and NPI 1679883912, issued on Oct 20, 2010. Check the license (Indiana 18002875A, as entered in NPPES) with the Indiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Peter Czaja
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 18002875A IN
Self-reported in NPPES; status is on the state search - Practice location
- 8100 Broadway, Merrillville, IN 46410
- Phone
- (219) 769-2020
- Enumerated
- Oct 20, 2010
- Record last updated
- Oct 20, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (219) 756-8937
- Medicaid ID
- 200866690A IN
- Medicare enrollment
- Enrolled (PECOS I20101105000460); accepts Medicare assignment
- Medical or professional school
- Indiana University - School Of Optometry, 1997
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,578 in Indiana → Look up another NPI →
Verify John Peter Czaja in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Indiana board licenses this profession
Search for license 18002875ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average optometrist in 2024
91 Medicare Part D claims for 39 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Latanoprost28 claims
- Timolol Maleate19 claims
- Prednisolone Acetate18 claims
- Neomycin-Polymyxin-Dexameth11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $15,929.95
58 payments; by number, the most common kind was travel and lodging; 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
- Aeg Indiana Professional PCMerrillville, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Peter Czaja among 1,578 optometrist records in Indiana
John Peter Czaja, O.D. is one of 1,578 optometrist records with a practice address in Indiana. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 62% of them.
- NPI issued2010 · 62% of these records are older, 36% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1997 · median 2008 among the 1,014 with a school on file
- Record last updated2010 · 66% 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 Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 optometrist records list a practice address in Merrillville
They are 30 of the 1,972 NPPES records with a practice address in Merrillville, and 1,578 optometrist records in Indiana.
All 1,578 in Indiana → Every provider in Merrillville → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Mark Allmaras, O.D.Merrillville, IN 464101609842558
- Miklos Balogh, O.D.Merrillville, IN 464101245300060
- Alison Byrne, O.D.Merrillville, IN 464101275650608
- Sara Cubenas, O.D.Merrillville, IN 464101902004989
- Dennis Jahovic, O.D.Merrillville, IN 464101184731812
- Michael Kelley, O.D.Merrillville, IN 464101558324368
- Timothy McGillen, O.D.Merrillville, IN 464101285769133
- Robert Moses, O.D.Merrillville, IN 464101417938010
Common questions
What is John Peter Czaja, O.D.'s NPI number?
John Peter Czaja, O.D.'s National Provider Identifier (NPI) is 1679883912, issued on Oct 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is John Peter Czaja, O.D. located?
The NPPES record lists a practice address at 8100 Broadway, Merrillville, IN, 46410. Phone: (219) 769-2020. Providers update this record themselves, so call before visiting.
How can I verify John Peter Czaja, O.D.'s license?
NPPES lists Indiana license number 18002875A, as entered by the provider. Search the Indiana board that licenses this profession; the NPPES record confirms identity only.
How much does John Peter Czaja, O.D. prescribe under Medicare Part D?
In 2024, John Peter Czaja, O.D. had 91 Medicare Part D claims for 39 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions 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.