John D. Walther, MD
NPI 1609816958ActiveIndividual· Emergency Medicine· Santa Cruz, CA
Emergency Medicine (MD) in Santa Cruz, California, trained at University of California, Irvine, California College of Medicine (class of 1978). 161 Medicare patients in 2024, $21,163 paid; nearly all of their 67 Part D prescriptions were generic (96%).
Overview
| NPI | 1609816958 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2006 |
| Last updated in NPPES | Dec 3, 2024 |
| Certified by provider | Dec 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | G40705 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 268 across 27 procedure codes |
| Paid by Medicare | $21,163 |
Part D prescriptions in 2024
| Prescriptions (claims) | 67 · 67 30-day fills |
|---|---|
| Patients | 55 |
| Total drug cost | $409.52 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Emergency Medicine |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 39 emergency medicine physicians in Santa Cruz · All emergency medicine physicians in California