Jiyon Jane Choi, MD
NPI 1144437567ActiveIndividual· Internal Medicine, Hematology & Oncology· Antioch, CA
Internal Medicine, Hematology & Oncology (MD) with Epic Care, practicing in Antioch, California. In 2024 Medicare paid $3,151,720 for 517 patients, and Part D covered 1,379 of their prescriptions, 77% of them generic. Pfizer Inc. was the largest of 38 companies reporting payments in 2025, $3,508 in all, mostly food and beverage. Lists Contra Costa Regional Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1144437567 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 16, 2007 |
| Last updated in NPPES | Apr 18, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A106992 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 517 |
|---|---|
| Services billed | 190,690 across 143 procedure codes |
| Paid by Medicare | $3,151,720 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,379 · 2,102 30-day fills |
|---|---|
| Patients | 239 |
| Total drug cost | $2,646,342 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Epic CareWalnut Creek, CA · 55 clinicians
Hospital affiliations
- Contra Costa Regional Medical CenterMartinez, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- Sutter Delta Medical CenterAntioch, CA
Industry payments (Open Payments)
- 2025$3,508 · 153 payments from 38 companies
- 2024$3,609 · 162 payments from 33 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $392.76 | 17 |
| Merck Sharp & Dohme LLC | $358.24 | 14 |
| Celgene Corporation | $315.19 | 15 |
| Novartis Pharmaceuticals Corporation | $246.55 | 9 |
| Takeda Pharmaceuticals U.S.A., Inc. | $214.48 | 14 |
What the 2025 payments were for
- Food and Beverage$3,508 · 153 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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