Quick answers
- Which hospitals does Sanna E. Herwald work at?
- Medicare's official clinician data lists Sanna E. Herwald at 3 hospitals: Stanford Health Care, UnityPoint Health - Meriter and University of WI Hospitals & Clinics Authority. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sanna E. Herwald see patients?
- Medicare's clinician data lists 2 practice locations, including Stanford, CA and Madison, WI. Call before your visit to confirm the address.
- What is Sanna E. Herwald's specialty?
- Medicare lists Interventional Radiology as the primary specialty, and also Diagnostic Radiology.
- Does Sanna E. Herwald accept Medicare assignment?
- Yes. Medicare's clinician data says Sanna E. Herwald 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 Sanna E. Herwald?
- (650) 723-4000, as listed in official Medicare / NPI Registry data.
- What is Sanna E. Herwald's NPI number?
- 1710449111. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sanna E. Herwald works
Medicare's Facility Affiliation Data lists Sanna E. Herwald at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stanford Health CareStanford, CA · Acute Care Hospital · CCN 050441
- UnityPoint Health - MeriterMadison, WI · Acute Care Hospital · CCN 520089
- University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · CCN 520098
Practice locations
Addresses where Sanna E. Herwald is enrolled with Medicare (CMS data updated 2026-10-02).
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
- 600 Highland AveMadison, WI 53792 (608) 263‑6400
Group practices
Medicare enrollment lists Sanna E. Herwald as a member of these groups (CMS data updated 2026-10-02).
- Stanford Health Care3,122 clinicians in the group
- University of Wisconsin Medical Foundation Inc2,553 clinicians in the group
Specialties
- Interventional Radiologyprimary
- Diagnostic Radiologyalso
Other interventional radiologists in Stanford
Clinicians with the same Medicare primary specialty in Stanford, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1710449111 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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