John Chan, OD
- Medicare patients, 2024
- 18
- Industry payments
- $400
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Practice address
- 4000 Luxottica Pl, Mason, OH 45040
- Practice phone
- Call (513) 765-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Luxottica of America Inc.
Mason, Ohio
Find John Chan'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 Chan is an optometrist in Mason, Ohio
John Chan practices at Luxottica of America Inc. in Mason, Ohio.
John Chan's NPI, 1790185932, was assigned on August 25, 2014. John Chan holds Nevada license 975.
- NPI
- 1790185932NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385916766
- NPI enumeration date
- August 25, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (513) 765-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
John Chan practices at Luxottica of America Inc. in Mason, Ohio
John Chan's primary practice is Luxottica of America Inc., at 4000 Luxottica Pl, Mason, OH 45040 in Warren County. The practice phone is (513) 765-6000.
- Luxottica of America Inc.4000 Luxottica Pl, Mason, OH 45040 · Warren CountyPhone(513) 765-6000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
John Chan is affiliated with 2 sites of care and 1 medical group
John Chan's primary practice is Luxottica of America Inc. in Mason, Ohio. Dmand AI also links John Chan to 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 Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Chan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Luxottica of America Inc. | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John Chan is one of 2,779 optometrists in Ohio
Optometrist is John Chan's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Dmand AI has John Chan's licenses on file in 2 states: Nevada and California.
Specialties and state licenses
- Optometrist, NevadaPrimary
- California license
Optometrists near John Chan
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 Chan treated 18 Medicare patients in 2024, average age 76
CMS counts 18 Medicare patients who saw John Chan in 2024. The largest group is under 65, with 0 patients. 75% of them have high cholesterol, and 61% have high blood pressure. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Chan's median patient age at 70, with 70% women.
John Chan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among John Chan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure61%
Share of Medicare patients with each condition. A patient can have several.
John Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women70%
- Men30%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How John Chan takes part in Medicare
John Chan 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)
John Chan received $400 in industry payments in 2025
CMS Open Payments shows 5 general payments to John Chan from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $151.
Companies that paid John Chan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John Chan'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) |
| 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) |
| 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 Chan
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 Chan's NPI number?
John Chan's NPI number is 1790185932. It was assigned on August 25, 2014, and it is active in the NPI Registry.
What does John Chan specialize in?
John Chan is an optometrist in Mason, Ohio. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John Chan practice?
John Chan practices at 4000 Luxottica Pl, Mason, OH 45040. John Chan's primary practice is Luxottica of America Inc. in Mason, Ohio. Dmand AI also links John Chan to 1 group practice or clinic and 1 medical group.
What is John Chan's office phone number?
The practice phone on file for John Chan is (513) 765-6000.
What is John Chan's medical license number?
John Chan holds Nevada license 975, one of the licenses on file in 2 states.
Which states has John Chan been licensed in?
Dmand AI has state licenses on file for John Chan in Nevada and California.
Does John Chan accept Medicare?
Yes. CMS lists John Chan as accepting Medicare assignment.
How many Medicare patients does John Chan see?
CMS counts 18 Medicare patients who saw John Chan in 2024, with an average age of 76.
Has John Chan received payments from drug or device companies?
CMS Open Payments shows $400 in general payments to John Chan from 3 companies from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has John Chan been practicing?
John Chan graduated from medical school in 2014, 12 years ago.
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