Dr. On Chen, MD
- Medicare services, 2024
- 7,011
- Medicare patients, 2024
- 342
- Part D claims, 2024
- 1,226
- Publications
- 21
- Hospital affiliations
- 1
- Practice address
- 26 Research Way, East Setauket, NY 11733
- Practice phone
- Call (631) 444-2448
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stony Brook Internists
East Setauket, New York
Find Dr. Chen'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.
Dr. On Chen is an interventional cardiologist in East Setauket, New York
Dr. Chen practices at Stony Brook Internists in East Setauket, New York.
Dr. Chen's NPI, 1750681912, was assigned on October 21, 2010. Dr. Chen graduated from Iuliu Hatieganu University of Medicine and Pharmacy in 2004. Dr. Chen holds New York license 278688.
- NPI
- 1750681912NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305122086
- NPI enumeration date
- October 21, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (631) 444-2448
- 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 Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. On Chen practices at Stony Brook Internists in East Setauket, New York
Dr. Chen's primary practice is Stony Brook Internists, at 26 Research Way, East Setauket, NY 11733 in Suffolk County. The practice phone is (631) 444-2448.
- Stony Brook Internists26 Research Way, East Setauket, NY 11733 · Suffolk CountyPhone(631) 444-2448
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. On Chen is affiliated with 4 sites of care and 2 medical groups
Dr. Chen's primary practice is Stony Brook Internists in East Setauket, New York. Dr. Chen is also affiliated with Stony Brook University Hospital. The medical group on file is Stony Brook Internists. Dmand AI also links Dr. Chen to 2 more group practices and clinics 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 Dr. On Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stony Brook Internists | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. On Chen is one of 363 interventional cardiologists in New York
Interventional cardiology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RI0011X. Dr. Chen is licensed in New York.
Specialties and state licenses
- Interventional cardiology, New YorkPrimary
Interventional cardiologists near Dr. Chen
Counts of interventional cardiologists 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. On Chen billed Medicare for 7,011 services in 2024
CMS data shows 7,011 Medicare services from Dr. Chen across 14 procedure codes in 2024, for 342 Medicare patients. Medicare paid $150,918 for them.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 02024: 6,248
- Office and hospital visits
- 2023: 3922024: 4043%
- Tests and treatments
- 2023: 3812024: 3596%
Where Dr. Chen's Medicare services took place, 2024
- In an office6,71796%
- In a facility2944%
Dr. Chen compared with the New York median for interventional cardiologists, 2024
- Dr. Chen
- New York median
- Medicare services
- 7,011vs 9767.2 times
- Medicare patients
- 342vs 341Close to median
- Part D claims
- 1,081vs 93615% above
Medians across 352 interventional cardiologists in New York with Dmand AI profiles that report each measure.
Dr. Chen'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.
Need commercial claims for Dr. Chen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other interventional cardiologists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. On Chen treated 342 Medicare patients in 2024, average age 75
CMS counts 342 Medicare patients who saw Dr. Chen in 2024. The largest group is 75 to 84, with 133 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 2.02, 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. Chen's median patient age at 64, with 38% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women15345%
- Men18955%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Heart failure54%
- Diabetes51%
- Arthritis46%
- Chronic kidney disease40%
- Atrial fibrillation36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women38%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. On Chen wrote 1,226 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 1,226 Medicare Part D claims for 153 patients. 80% of them were for generic drugs. CMS names the drug for 1,081 of them, across 21 drugs with 11 or more claims each, at $233,231 in total drug cost. In 2023, CMS named 973 claims across 19 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic980 claims80%
- Brand-name246 claims20%
Dr. Chen'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: 9732024: 1,08111%
Drugs named by CMS: 21 in 2024, 19 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. On Chen ranks in the 69th percentile for coronary angioplasty and stenting in Medicare
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth. CMS counts 33 procedures of coronary angioplasty and stenting by Dr. Chen, more than 69% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Chen ranks in Medicare procedure volume
- Coronary angioplasty and stenting
- 69th percentile33 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. On Chen has 21 publications on record
Dmand AI links 21 papers to Dr. Chen, published from 2013 to 2025. 2014 was the busiest year, with 4. The most frequent topics are Coronary Angiography, Aortic Valve Stenosis and Cardiac Catheterization. Dr. Chen has published most often in JACC Case Rep. Dr. Chen's most frequent co-authors are Jacob Shani, MD, Robert Frankel, MD and John P. Reilly, MD.
Dr. Chen's papers by year, 2013 to 2025
Topics Dr. Chen writes about most
- Coronary Angiography
- Aortic Valve Stenosis
- Cardiac Catheterization
- Radial Artery
Dr. Chen's most frequent co-authors
Recent publications by Dr. Chen
See who Dr. Chen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chen works with, so you can find a warm path to the right interventional cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. On Chen received $143,146 in industry payments from 2016 to 2025
CMS Open Payments shows 438 general payments to Dr. Chen from 36 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 73% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $47,472. It also lists 1 research payment totaling $168 in 2024, naming 1 clinical trial.
General payments to Dr. Chen by program year, 2016 to 2025
General payments to Dr. Chen by kind, 2016 to 2025
- Speaker and faculty fees$104,21073%
- Food and beverage$18,35113%
- Travel and lodging$10,2237%
- Consulting fees$7,8435%
- Other$2,5002%
Companies that paid Dr. Chen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. On Chen graduated from Iuliu Hatieganu University of Medicine and Pharmacy
Dr. Chen graduated from Iuliu Hatieganu University of Medicine and Pharmacy in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. On Chen'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. On Chen
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. On Chen's NPI number?
Dr. On Chen's NPI number is 1750681912. It was assigned on October 21, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. On Chen?
Dr. On Chen is an interventional cardiologist in East Setauket, New York. The primary specialty in the NPI Registry is Interventional Cardiology Physician (taxonomy code 207RI0011X).
Where does Dr. On Chen practice?
Dr. Chen practices at 26 Research Way, East Setauket, NY 11733. Dr. Chen's primary practice is Stony Brook Internists in East Setauket, New York. Dmand AI also links Dr. Chen to 2 group practices and clinics and 1 medical group.
What is Dr. On Chen's office phone number?
The practice phone on file for Dr. Chen is (631) 444-2448.
What is Dr. On Chen's medical license number?
Dr. Chen holds New York license 278688.
Which hospitals is Dr. On Chen affiliated with?
Dr. Chen is affiliated with Stony Brook University Hospital.
What medical group is Dr. On Chen part of?
Dr. Chen is linked to Stony Brook Internists. Dmand AI links Dr. Chen to 1 more medical group.
Does Dr. On Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 7,011 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. On Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
How many Medicare patients does Dr. On Chen see?
CMS counts 342 Medicare patients who saw Dr. Chen in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. On Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were injected or infused drug (J1306), heart test or procedure (93000) and office visit, established patient (99214).
Where did Dr. On Chen go to medical school?
Dr. Chen graduated from Iuliu Hatieganu University of Medicine and Pharmacy in 2004.
What drugs does Dr. On Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Ezetimibe, Atorvastatin Calcium and Carvedilol.
Has Dr. On Chen received payments from drug or device companies?
CMS Open Payments shows $143,146 in general payments to Dr. Chen from 36 companies from 2016 to 2025. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. On Chen been practicing?
Dr. Chen graduated from medical school in 2004, 22 years ago.
Does Dr. On Chen do research?
Dmand AI links 21 publications to Dr. Chen, published from 2013 to 2025.
Who does Dr. On Chen publish with?
Dr. Chen's most frequent co-authors are Jacob Shani, MD (6 shared papers), Robert Frankel, MD (3 shared papers) and John P. Reilly, MD (3 shared papers).
Selling to interventional cardiology practices?
See interventional cardiologists in New York by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card