Joonun Choi, MD
NPI 1053583914ActiveIndividual· Internal Medicine, Cardiovascular Disease· Stamford, CT
Internal Medicine, Cardiovascular Disease (MD) in Stamford, Connecticut, trained at New York Medical College (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $367,988 for 1,745 claims, against $119,830 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 6 companies reporting payments in 2025, $552.96 in all, mostly food and beverage.
Overview
| NPI | 1053583914 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 31, 2008 |
| Last updated in NPPES | Dec 30, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 046302 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,048 |
|---|---|
| Services billed | 2,242 across 32 procedure codes |
| Paid by Medicare | $119,830 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,745 · 4,673 30-day fills |
|---|---|
| Patients | 305 |
| Total drug cost | $367,988 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Stamford Health Medical Group IncStamford, CT · 444 clinicians
Hospital affiliations
- Greenwich Hospital Association -Greenwich, CT
- Norwalk HospitalNorwalk, CT
- Stamford HospitalStamford, CT
Industry payments (Open Payments)
- 2025$552.96 · 10 payments from 6 companies
- 2024$220.33 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $155.81 | 2 |
| Bridgebio Pharma, Inc. | $149.23 | 1 |
| Alnylam Pharmaceuticals Inc. | $121.52 | 1 |
| Pfizer Inc. | $47.12 | 3 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $42.55 | 2 |
What the 2025 payments were for
- Food and Beverage$552.96 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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