J Cataract Refract Surg
Axial Length, EyeBiometryCornea
Dr. Nicholas Karjun Chan, MD
NPI1396132403PAC ID6709201213
- Medicare services, 2024
- 1,759
- Medicare patients, 2024
- 424
- Part D claims, 2024
- 2,646
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 6201 W 95th St, Oak Lawn, IL 60453
- Practice phone
- Call (708) 636-9393
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Family Eye Physicians, Ltd
Oak Lawn, Illinois
Find Dr. Chan's professional email, personal email and mobile number
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Dr. Nicholas Karjun Chan is an ophthalmologist in Oak Lawn, Illinois
Dr. Chan practices at Family Eye Physicians, Ltd in Oak Lawn, Illinois.
Dr. Chan's NPI, 1396132403, was assigned on April 16, 2015. Dr. Chan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2015. Dr. Chan holds Illinois license 036152835.
NPI and contact details
- NPI
- 1396132403NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709201213
- NPI enumeration date
- April 16, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 636-9393
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nicholas Karjun Chan practices at Family Eye Physicians, Ltd in Oak Lawn, Illinois
Dr. Chan's primary practice is Family Eye Physicians, Ltd, at 6201 W 95th St, Oak Lawn, IL 60453 in Cook County. The practice phone is (708) 636-9393.
- Family Eye Physicians, Ltd6201 W 95th St, Oak Lawn, IL 60453 · Cook CountyPhone(708) 636-9393
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nicholas Karjun Chan is affiliated with 3 sites of care and 1 medical group
Dr. Chan's primary practice is Family Eye Physicians, Ltd in Oak Lawn, Illinois. Dr. Chan is also affiliated with OSF Little Company of Mary Medical Center. Dmand AI also links Dr. Chan to 1 more group practice or clinic and 1 medical group, each named with a free account.
Family Eye Physicians, LtdPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Nicholas Karjun Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Family Eye Physicians, Ltd | 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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Dr. Nicholas Karjun Chan is one of 692 ophthalmologists in Illinois
Ophthalmology is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Chan is licensed in Illinois.
Specialties and state licenses
- Ophthalmology, IllinoisPrimary
Ophthalmologists near Dr. Chan
Counts of ophthalmologists 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
Dr. Nicholas Karjun Chan billed Medicare for 1,759 services in 2024
CMS data shows 1,759 Medicare services from Dr. Chan across 16 procedure codes in 2024, for 424 Medicare patients. Medicare paid $204,534 for them.
Medicare services, 20241,759
Medicare patients424
Paid by Medicare$204,534
Procedure codes16
Dr. Chan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4062024: 62053%
- Office and hospital visits
- 2023: 4102024: 49922%
- Surgery
- 2023: 4692024: 4721%
- Drugs given in the office
- 2023: 1212024: 16839%
Where Dr. Chan's Medicare services took place, 2024
- In an office1,52487%
- In a facility23513%
Dr. Chan compared with the Illinois median for ophthalmologists, 2024
- Dr. Chan
- Illinois median
- Medicare services
- 1,759vs 1,54414% above
- Medicare patients
- 424vs 57727% below
- Part D claims
- 2,546vs 5824.4 times
Medians across 710 ophthalmologists in Illinois with Dmand AI profiles that report each measure.
Dr. Chan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chan and other ophthalmologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nicholas Karjun Chan treated 424 Medicare patients in 2024, average age 73
CMS counts 424 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 199 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.58, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 70, with 57% women.
Medicare patients, 2024424
Average age73
Average risk score1.58
Also on Medicaid36%
Dr. Chan's Medicare patients by age, 2024
Dr. Chan's Medicare patients by sex, 2024
- Women25259%
- Men17241%
Chronic conditions among Dr. Chan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes51%
- Arthritis44%
- Chronic kidney disease28%
- Ischemic heart disease27%
- Anxiety23%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. 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
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nicholas Karjun Chan wrote 2,646 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 2,646 Medicare Part D claims for 584 patients. 64% of them were for generic drugs. CMS names the drug for 2,546 of them, across 17 drugs with 11 or more claims each, at $112,768 in total drug cost. In 2023, CMS named 938 claims across 11 drugs.
Part D claims, 20242,646
Drugs named by CMS17
Total drug cost$112,768
Part D patients584
Dr. Chan's Part D claims by kind of drug, 2024
- Generic1,704 claims64%
- Brand-name942 claims36%
Dr. Chan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9382024: 2,546171%
Drugs named by CMS: 17 in 2024, 11 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Nicholas Karjun Chan ranks in the 84th percentile for cataract surgery in Medicare
Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 204 procedures of cataract surgery by Dr. Chan, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chan ranks in Medicare procedure volume
- Cataract surgery
- 84th percentile204 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Nicholas Karjun Chan has 1 publication on record
Dmand AI links 1 paper to Dr. Chan. Dr. Chan's most frequent co-authors are Surendra Basti, MD and Robin K. Kuriakose, MD.
Papers1
Dr. Chan's most frequent co-authors
Recent publications by Dr. Chan
See who Dr. Chan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chan works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Nicholas Karjun Chan received $4,319 in industry payments from 2021 to 2025
CMS Open Payments shows 139 general payments to Dr. Chan from 24 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 98% of the total. Mallinckrodt Hospital Products Inc. paid the most, $986.
General payments to Dr. Chan by program year, 2021 to 2025
General payments to Dr. Chan by kind, 2021 to 2025
$4.3Kin total
- Food and beverage$4,24198%
- Entertainment$391%
- Honoraria$391%
Companies that paid Dr. Chan the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Nicholas Karjun Chan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Dr. Chan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Nicholas Karjun 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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Dr. Nicholas Karjun 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 Dr. Nicholas Karjun Chan's NPI number?
Dr. Nicholas Karjun Chan's NPI number is 1396132403. It was assigned on April 16, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Nicholas Karjun Chan?
Dr. Nicholas Karjun Chan is an ophthalmologist in Oak Lawn, Illinois. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Nicholas Karjun Chan practice?
Dr. Chan practices at 6201 W 95th St, Oak Lawn, IL 60453. Dr. Chan's primary practice is Family Eye Physicians, Ltd in Oak Lawn, Illinois. Dmand AI also links Dr. Chan to 1 group practice or clinic and 1 medical group.
What is Dr. Nicholas Karjun Chan's office phone number?
The practice phone on file for Dr. Chan is (708) 636-9393.
What is Dr. Nicholas Karjun Chan's medical license number?
Dr. Chan holds Illinois license 036152835.
Which hospitals is Dr. Nicholas Karjun Chan affiliated with?
Dr. Chan is affiliated with OSF Little Company of Mary Medical Center.
Does Dr. Nicholas Karjun Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 1,759 services in 2024, and Dr. Chan accepts Medicare assignment.
How many Medicare patients does Dr. Nicholas Karjun Chan see?
CMS counts 424 Medicare patients who saw Dr. Chan in 2024, with an average age of 73.
What services does Dr. Nicholas Karjun Chan bill to Medicare?
In 2024, Dr. Chan's most billed Medicare services were office visit, established patient (99214), eye exam or test (92250) and eye exam or test (92136).
Where did Dr. Nicholas Karjun Chan go to medical school?
Dr. Chan graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 2015.
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What drugs does Dr. Nicholas Karjun Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Ofloxacin, Prednisolone Acetate and Latanoprost.
Has Dr. Nicholas Karjun Chan received payments from drug or device companies?
CMS Open Payments shows $4,319 in general payments to Dr. Chan from 24 companies from 2021 to 2025. The largest total came from Mallinckrodt Hospital Products Inc.
How long has Dr. Nicholas Karjun Chan been practicing?
Dr. Chan graduated from medical school in 2015, 11 years ago.
Does Dr. Nicholas Karjun Chan do research?
Dmand AI links 1 publication to Dr. Chan.
Who does Dr. Nicholas Karjun Chan publish with?
Dr. Chan's most frequent co-authors are Surendra Basti, MD (1 shared paper) and Robin K. Kuriakose, MD (1 shared paper).
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