Quick answers
- Which hospitals does Sandra J. Frohling work at?
- Medicare's official clinician data lists Sandra J. Frohling at 5 hospitals: Marshfield Medical Center - Eau Claire, Mayo Clinic Health System Chippewa Valley, Mayo Clinic Health System Eau Claire Hospital, Mayo Clinic Health System-Northland and Mayo Clinic Health System-Red Cedar Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sandra J. Frohling see patients?
- Medicare's clinician data lists 1 practice location in Eau Claire, WI. Call before your visit to confirm the address.
- What is Sandra J. Frohling's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Sandra J. Frohling accept Medicare assignment?
- Yes. Medicare's clinician data says Sandra J. Frohling 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.
- Does Sandra J. Frohling offer telehealth?
- Medicare's clinician data says Sandra J. Frohling offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sandra J. Frohling?
- (715) 838-5222, as listed in official Medicare / NPI Registry data.
- What is Sandra J. Frohling's NPI number?
- 1164532313. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sandra J. Frohling works
Medicare's Facility Affiliation Data lists Sandra J. Frohling at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Marshfield Medical Center - Eau ClaireEau Claire, WI · Acute Care Hospital · CCN 520210
- Mayo Clinic Health System Chippewa ValleyBloomer, WI · Critical Access Hospital · CCN 521314
- Mayo Clinic Health System Eau Claire HospitalEau Claire, WI · Acute Care Hospital · CCN 520070
- Mayo Clinic Health System-NorthlandBarron, WI · Critical Access Hospital · CCN 521315
- Mayo Clinic Health System-Red Cedar IncMenomonie, WI · Critical Access Hospital · CCN 521340
Practice locations
Addresses where Sandra J. Frohling is enrolled with Medicare (CMS data updated 2026-10-02).
- 733 W Clairemont AveEau Claire, WI 54701 (715) 838‑5222
Group practices
Medicare enrollment lists Sandra J. Frohling as a member of this group (CMS data updated 2026-10-02).
- Mayo Clinic Health System-Northwest Wisconsin Region Inc802 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Eau Claire
Clinicians with the same Medicare primary specialty in Eau Claire, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1164532313 |
| 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