Nan Chen
NPI 1558749887ActiveIndividual· Internal Medicine, Medical Oncology· Chicago, IL
Internal Medicine, Medical Oncology in Chicago, Illinois, trained at New York Medical College (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $1,407,945 for 692 claims, against $50,998 paid for services in 2024. Genentech USA, Inc. was the largest of 7 companies reporting payments in 2025, $13,845 in all, mostly consulting fees.
Overview
| NPI | 1558749887 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | Yes |
| NPI issued | May 6, 2015 |
| Last updated in NPPES | Jun 4, 2026 |
| Certified by provider | Jun 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 036156991 | IL |
| Internal Medicine, Medical Oncology | 207RX0202X | 01091761A | IN |
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 - Medical Oncology (IL); Practitioner - Medical Oncology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 168 |
|---|---|
| Services billed | 685 across 14 procedure codes |
| Paid by Medicare | $50,998 |
Part D prescriptions in 2024
| Prescriptions (claims) | 692 · 1,436 30-day fills |
|---|---|
| Patients | 168 |
| Total drug cost | $1,407,945 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical groups
- University of ChicagoChicago, IL · 1,712 clinicians
- The University of Chicago Medical CenterChicago, IL · 915 clinicians
Hospital affiliations
- Franciscan Health Crown PointCrown Point, IN
- The University of Chicago Medical CenterChicago, IL
- Uchicago Medicine Northwest IndianaCrown Point, IN
Industry payments (Open Payments)
- 2025$13,845 · 24 payments from 7 companies
- 2024$8,388 · 8 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech USA, Inc. | $4,686 | 6 |
| Astrazeneca Pharmaceuticals LP | $3,309 | 5 |
| Tersera Therapeutics LLC | $3,280 | 4 |
| Daiichi Sankyo Inc. | $1,566 | 3 |
| Gilead Sciences, Inc. | $637.76 | 2 |
What the 2025 payments were for
- Consulting Fee$11,393 · 8 payments
- Food and Beverage$920.44 · 10 payments
- Compensation for serving as faculty or as a speaker for a medical education program$842.70 · 1 payment
- Travel and Lodging$489.55 · 3 payments
- Long term medical supply or device loan$199.40 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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