John Peter Czaja, OD
- Medicare patients, 2024
- 31
- Part D claims, 2024
- 91
- Industry payments
- $19,732
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 111 E 4th St, Alton, IL 62002
- Practice phone
- Call (574) 267-3515
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Aeg Indiana Professional
Alton, Illinois
Find John Czaja's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John Peter Czaja is an optometrist in Alton, Illinois
John Czaja practices at Aeg Indiana Professional in Alton, Illinois.
John Czaja's NPI, 1679883912, was assigned on October 20, 2010. John Czaja graduated from Indiana University - School of Optometry in 1997. John Czaja holds Indiana license 18002875A.
- NPI
- 1679883912NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779777552
- NPI enumeration date
- October 20, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (574) 267-3515
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
John Peter Czaja practices at Aeg Indiana Professional in Alton, Illinois
John Czaja's primary practice is Aeg Indiana Professional, at 111 E 4th St, Alton, IL 62002 in Madison County. The practice phone is (574) 267-3515.
- Aeg Indiana Professional111 E 4th St, Alton, IL 62002 · Madison CountyPhone(574) 267-3515
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
John Peter Czaja is affiliated with 3 sites of care and 1 medical group
John Czaja's primary practice is Aeg Indiana Professional in Alton, Illinois. Dmand AI also links John Czaja to 1 physician office, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at John Peter Czaja's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Czaja practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aeg Indiana Professional | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John Peter Czaja is one of 2,194 optometrists in Illinois
Optometrist is John Czaja's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Czaja is licensed in Indiana.
Specialties and state licenses
- Optometrist, IndianaPrimary
Optometrists near John Czaja
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John Peter Czaja treated 31 Medicare patients in 2024, average age 73
CMS counts 31 Medicare patients who saw John Czaja in 2024. 74% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Czaja's median patient age at 60, with 50% women.
John Czaja's Medicare patients by sex, 2024
- Women1652%
- Men1548%
Chronic conditions among John Czaja's Medicare patients, 2024
- High cholesterol74%
- High blood pressure71%
- Diabetes58%
- Arthritis48%
Share of Medicare patients with each condition. A patient can have several.
John Czaja's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women50%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John Peter Czaja wrote 91 Medicare Part D claims in 2024
In 2024, John Czaja wrote 91 Medicare Part D claims for 39 patients. 53% of them were for generic drugs.
John Czaja's Part D claims by kind of drug, 2024
- Generic48 claims53%
- Brand-name43 claims47%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How John Peter Czaja takes part in Medicare
John Czaja accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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John Peter Czaja received $19,732 in industry payments in 2025
CMS Open Payments shows 49 general payments to John Czaja from 1 drug or device company in 2025. Speaker and faculty fees make up the largest share, 86% of the total. Johnson & Johnson Vision Care, Inc. paid the most, $19,732.
General payments to John Czaja by kind, 2025 to 2025
- Speaker and faculty fees$17,05086%
- Travel and lodging$2,16111%
- Food and beverage$5213%
Companies that paid John Czaja the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
John Peter Czaja graduated from Indiana University - School of Optometry
John Czaja graduated from Indiana University - School of Optometry in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John Peter Czaja's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John Peter Czaja
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Peter Czaja's NPI number?
John Peter Czaja's NPI number is 1679883912. It was assigned on October 20, 2010, and it is active in the NPI Registry.
What does John Peter Czaja specialize in?
John Peter Czaja is an optometrist in Alton, Illinois. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John Peter Czaja practice?
John Czaja practices at 111 E 4th St, Alton, IL 62002. John Czaja's primary practice is Aeg Indiana Professional in Alton, Illinois. Dmand AI also links John Czaja to 1 physician office, 1 group practice or clinic and 1 medical group.
What is John Peter Czaja's office phone number?
The practice phone on file for John Czaja is (574) 267-3515.
What is John Peter Czaja's medical license number?
John Czaja holds Indiana license 18002875A.
Does John Peter Czaja accept Medicare?
Yes. CMS lists John Czaja as accepting Medicare assignment.
How many Medicare patients does John Peter Czaja see?
CMS counts 31 Medicare patients who saw John Czaja in 2024, with an average age of 73.
Where did John Peter Czaja go to medical school?
John Czaja graduated from Indiana University - School of Optometry in 1997.
Has John Peter Czaja received payments from drug or device companies?
CMS Open Payments shows $19,732 in general payments to John Czaja from 1 company from 2025 to 2025. The largest total came from Johnson & Johnson Vision Care, Inc.
How long has John Peter Czaja been practicing?
John Czaja graduated from medical school in 1997, 29 years ago.
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