Quick answers
- Where does Diane A. Thomasen see patients?
- Medicare's clinician data lists 5 practice locations, including Brownsville, CA and Yuba City, CA. Call before your visit to confirm the address.
- What is Diane A. Thomasen's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Diane A. Thomasen accept Medicare assignment?
- Yes. Medicare's clinician data says Diane A. Thomasen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Diane A. Thomasen?
- (530) 675-2457, as listed in official Medicare / NPI Registry data.
- What is Diane A. Thomasen's NPI number?
- 1114935269. 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 Diane A. Thomasen is enrolled with Medicare (CMS data updated 2026-10-02).
- 16911 Willow Glen RdBrownsville, CA 95919 (530) 675‑2457
- 460 Plumas BlvdYuba City, CA 95991 (530) 741‑1400
- 460 Plumas Blvd, Suite 202Yuba City, CA 95991 (530) 749‑5500
- 480 Plumas BlvdYuba City, CA 95991 (530) 749‑3500
- 480 Plumas Blvd, Suite 204Yuba City, CA 95991 (530) 749‑3307
Group practices
Medicare enrollment lists Diane A. Thomasen as a member of this group (CMS data updated 2026-10-02).
- Sutter Valley Medical Foundation2,500 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Brownsville
Clinicians with the same Medicare primary specialty in Brownsville, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Medical school | University Of California, Davis School Of Medicine |
| Graduation year | 1977 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114935269 |
| 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 2026-10-02, retrieved 2026-10-29
- 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