Ken Zafren, MD
NPI 1366466120ActiveIndividual· Emergency Medicine· Stanford, CA
Emergency Medicine (MD) in Stanford, California, trained at University of Washington School of Medicine (class of 1984). 132 Medicare patients in 2024, $20,846 paid; all of their 50 Part D prescriptions were generic. Btg International Inc. reported $9,000 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1366466120 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 26, 2006 |
| Last updated in NPPES | Mar 21, 2024 |
| Certified by provider | Mar 21, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | G70948 | CA |
| Emergency Medicine | 207P00000X | 2181 | AK |
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 - Emergency Medicine (CA); Practitioner - Emergency Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 132 |
|---|---|
| Services billed | 160 across 10 procedure codes |
| Paid by Medicare | $20,846 |
Part D prescriptions in 2024
| Prescriptions (claims) | 50 · 126 30-day fills |
|---|---|
| Total drug cost | $3,348 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Emergency Medicine |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$9,000 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Btg International Inc. | $9,000 | 3 |
What the 2025 payments were for
- Consulting Fee$9,000 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 166 emergency medicine physicians in Stanford · All emergency medicine physicians in California