Quick answers
- Does William A. Vanhorn accept Medicare assignment?
- Yes. Medicare's clinician data says William A. Vanhorn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is William A. Vanhorn's NPI number?
- 1588620058. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William A. Vanhorn is enrolled with Medicare (CMS data updated October 2, 2026).
- 2767 Olive HwyOroville, CA 95966
- PO Box, Suite 5040Oroville, CA 95966
Specialties
- Psychiatryprimary
Other psychiatrists in Oroville
Clinicians with the same Medicare primary specialty in Oroville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of South Alabama College Of Medicine |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588620058 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians