Dr. John Yohan Chong, MD
- Medicare services, 2024
- 961
- Medicare patients, 2024
- 306
- Part D claims, 2024
- 877
- Industry payments
- $573
- Affiliated sites
- 1
- Practice address
- 5900 Fort Dr, Centreville, VA 20121-2425
- Practice phone
- Call (571) 210-5535
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Virginia Adult and Pediatric Ophthalmology
Physician office · Centreville, Virginia
Find Dr. Chong's professional email, personal email and mobile number
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Dr. John Yohan Chong is an ophthalmologist in Centreville, Virginia
Dr. Chong practices at Virginia Adult and Pediatric Ophthalmology in Centreville, Virginia.
Dr. Chong's NPI, 1326219429, was assigned on March 17, 2008. Dr. Chong graduated from George Washington University School of Medicine in 2004. Dr. Chong holds Virginia license 0101243232.
- NPI
- 1326219429NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234207143
- NPI enumeration date
- March 17, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (571) 210-5535
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Yohan Chong practices at Virginia Adult and Pediatric Ophthalmology in Centreville, Virginia
Dr. Chong's primary practice is Virginia Adult and Pediatric Ophthalmology, at 5900 Fort Dr, Centreville, VA 20121-2425. The practice phone is (571) 210-5535.
- Virginia Adult and Pediatric Ophthalmology5900 Fort Dr, Centreville, VA 20121-2425Phone(571) 210-5535
Source: Dmand AI Affiliation Data
Dr. John Yohan Chong is affiliated with 1 site of care
Dr. Chong's primary practice is Virginia Adult and Pediatric Ophthalmology in Centreville, Virginia.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Yohan Chong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chong practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Virginia Adult and Pediatric Ophthalmology | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Yohan Chong is one of 504 ophthalmologists in Virginia
Ophthalmology is Dr. Chong's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Chong is licensed in Virginia.
Specialties and state licenses
- Ophthalmology, VirginiaPrimary
Ophthalmologists near Dr. Chong
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. John Yohan Chong billed Medicare for 961 services in 2024
CMS data shows 961 Medicare services from Dr. Chong across 11 procedure codes in 2024, for 306 Medicare patients. Medicare paid $52,383 for them. Every service was in an office.
Dr. Chong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 8902024: 8376%
- Office and hospital visits
- 2023: 1212024: 9918%
- Imaging
- 2023: 292024: 2514%
Dr. Chong compared with the Virginia median for ophthalmologists, 2024
- Dr. Chong
- Virginia median
- Medicare services
- 961vs 1,92450% below
- Medicare patients
- 306vs 78061% below
- Part D claims
- 827vs 52258% above
Medians across 517 ophthalmologists in Virginia with Dmand AI profiles that report each measure.
Dr. Chong'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. Chong and other ophthalmologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Yohan Chong treated 306 Medicare patients in 2024, average age 74
CMS counts 306 Medicare patients who saw Dr. Chong in 2024. The largest group is 65 to 74, with 158 patients. 75% of them have high cholesterol, and 67% have high blood pressure. 22% are also on Medicaid. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chong's median patient age at 67, with 54% women.
Dr. Chong's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chong's Medicare patients by sex, 2024
- Women15952%
- Men14748%
Chronic conditions among Dr. Chong's Medicare patients, 2024
- High cholesterol75%
- High blood pressure67%
- Diabetes46%
- Arthritis35%
- Osteoporosis18%
- Anxiety17%
- Chronic kidney disease15%
- Ischemic heart disease15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women54%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Yohan Chong wrote 877 Medicare Part D claims in 2024
In 2024, Dr. Chong wrote 877 Medicare Part D claims for 191 patients. 75% of them were for generic drugs. CMS names the drug for 827 of them, across 11 drugs with 11 or more claims each, at $53,416 in total drug cost. In 2023, CMS named 591 claims across 7 drugs.
Dr. Chong's Part D claims by kind of drug, 2024
- Generic654 claims75%
- Brand-name223 claims25%
Dr. Chong'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: 5912024: 82740%
Drugs named by CMS: 11 in 2024, 7 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
How Dr. John Yohan Chong takes part in Medicare
Dr. Chong 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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Dr. John Yohan Chong received $573 in industry payments from 2016 to 2023
CMS Open Payments shows 7 general payments to Dr. Chong from 4 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 98% of the total. Gilead Sciences, Inc. paid the most, $357.
General payments to Dr. Chong by program year, 2016 to 2023
General payments to Dr. Chong by kind, 2016 to 2023
- Food and beverage$56598%
- Education$92%
Companies that paid Dr. Chong the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Yohan Chong graduated from George Washington University School of Medicine
Dr. Chong graduated from George Washington University School of Medicine in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Yohan Chong'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| 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. John Yohan Chong
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. John Yohan Chong's NPI number?
Dr. John Yohan Chong's NPI number is 1326219429. It was assigned on March 17, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Yohan Chong?
Dr. John Yohan Chong is an ophthalmologist in Centreville, Virginia. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Yohan Chong practice?
Dr. Chong practices at 5900 Fort Dr, Centreville, VA 20121-2425. Dr. Chong's primary practice is Virginia Adult and Pediatric Ophthalmology in Centreville, Virginia.
What is Dr. John Yohan Chong's office phone number?
The practice phone on file for Dr. Chong is (571) 210-5535.
What is Dr. John Yohan Chong's medical license number?
Dr. Chong holds Virginia license 0101243232.
Does Dr. John Yohan Chong accept Medicare?
Yes. CMS data shows Dr. Chong billed Medicare for 961 services in 2024, and Dr. Chong accepts Medicare assignment.
How many Medicare patients does Dr. John Yohan Chong see?
CMS counts 306 Medicare patients who saw Dr. Chong in 2024, with an average age of 74.
What services does Dr. John Yohan Chong bill to Medicare?
In 2024, Dr. Chong's most billed Medicare services were eye exam or test (92014), eye exam or test (92201) and eye exam or test (92133).
Where did Dr. John Yohan Chong go to medical school?
Dr. Chong graduated from George Washington University School of Medicine in 2004.
What drugs does Dr. John Yohan Chong prescribe most?
In 2024 Medicare Part D data, Dr. Chong's most prescribed drugs by claims were Latanoprost, Erythromycin and Timolol Maleate.
Has Dr. John Yohan Chong received payments from drug or device companies?
CMS Open Payments shows $573 in general payments to Dr. Chong from 4 companies from 2016 to 2023. The largest total came from Gilead Sciences, Inc.
How long has Dr. John Yohan Chong been practicing?
Dr. Chong graduated from medical school in 2004, 22 years ago.
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