Warren Chow, MD
NPI 1093822017ActiveIndividual· Internal Medicine, Hematology & Oncology· Orange, CA
Internal Medicine, Hematology & Oncology (MD) in Orange, California, trained at R Franklin University of Med & Sci/Chicago Medical School (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,506,610 for 334 claims, against $45,348 paid for services in 2024. Boston Scientific Corporation was the largest of 3 companies reporting payments in 2025, $531.00 in all, mostly food and beverage.
Overview
| NPI | 1093822017 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 24, 2006 |
| Last updated in NPPES | Mar 25, 2025 |
| Certified by provider | Mar 25, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G61354 | CA |
| Internal Medicine | 207R00000X | G61354 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | G61354 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 152 |
|---|---|
| Services billed | 607 across 11 procedure codes |
| Paid by Medicare | $45,348 |
Part D prescriptions in 2024
| Prescriptions (claims) | 334 · 417 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $1,506,610 |
| Generic share | 69% of claims |
Education and affiliations
| Medical school | R Franklin University of Med & Sci/Chicago Medical School |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$531.00 · 13 payments from 3 companies
- 2024$457.28 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $282.23 | 10 |
| W. L. Gore & Associates, Inc. | $229.49 | 2 |
| Shockwave Medical, Inc | $19.28 | 1 |
What the 2025 payments were for
- Food and Beverage$531.00 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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