Gregory Lee Chen, M.D.
NPI 1699853457ActiveIndividual· Urology· Monterey, CA
Urology (M.D.) in Monterey, California, trained at Rush Medical College of Rush University (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $111,502 for 1,939 claims, against $2,040 paid for services in 2024. Astellas Pharma US Inc reported $114.89 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1699853457 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 1, 2006 |
| Last updated in NPPES | Sep 25, 2026 |
| Certified by provider | Sep 25, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | G84622 | 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 - Urology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 14 |
|---|---|
| Services billed | 26 across 10 procedure codes |
| Paid by Medicare | $2,040 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,939 · 5,094 30-day fills |
|---|---|
| Patients | 742 |
| Total drug cost | $111,502 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Urology |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$114.89 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $114.89 | 1 |
What the 2025 payments were for
- Food and Beverage$114.89 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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