Walter C. Prehn M.D. A Professional Corporation
NPI 1306143169ActiveOrganization· Internal Medicine· Sonoma, CA
Internal Medicine in Sonoma, California, registered in NPPES in February 2011. The authorized official on file is Walter Craig Prehn, M.D., President.
Overview
| NPI | 1306143169 |
|---|---|
| Status | Active |
| Entity type | Organization |
| NPI issued | Feb 14, 2011 |
| Last updated in NPPES | Oct 5, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G25454 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
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