On Chen, M.D
NPI 1750681912 · Interventional Cardiology Physician · Stony Brook, NY
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
On Chen, M.D is a Interventional Cardiology Physician provider in Stony Brook, NY (NPI 1750681912).
Provider details
- NPI number
- 1750681912
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 278688 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
763 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 203 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 175 | $150 |
| Critical Care, First 30-74 Minutes99291 | 129 | $246 |
| Insertion of Tube in Left Lower Heart Chamber and Coronary Artery for Diagnosis With Review By Radiologist93458 | 46 | $292 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 44 | $151 |
| Ultrasound Evaluation of Heart Blood Vessel Or Graft With Review By Radiologist, Initial Vessel |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ezetimibe | 133 | 52 |
| Atorvastatin Calcium | 102 | 44 |
| Carvedilol | 101 | 37 |
| Metoprolol Succinate | 90 | 34 |
| Rosuvastatin Calcium | 86 | 37 |
| Spironolactone | 68 | 25 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 64 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,511 across 69 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-10-21
- Last updated
- 2022-07-21
Frequently asked questions
- What is On Chen's NPI number?
- On Chen's National Provider Identifier (NPI) is 1750681912, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is On Chen's specialty?
- On Chen is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is On Chen located?
- On Chen's practice location on file with NPPES is Hsc T16-080, Stony Brook, NY 11794-6002.
- What is On Chen's phone number?
- The practice phone number listed in the NPPES registry for On Chen is (631) 444-1060.
- Does On Chen accept Medicare?
- On Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is On Chen's NPI active?
- Yes — On Chen's NPI (1750681912) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.