Quick answers
- Which hospitals does David Grenda work at?
- Medicare's official clinician data lists David Grenda at 3 hospitals: Mayo Clinic Health System Eau Claire Hospital, Mayo Clinic Health System-Franciscan Medical Center Inc and Mayo Clinic Health System-Red Cedar Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David Grenda see patients?
- Medicare's clinician data lists 2 practice locations, including Eau Claire, WI and La Crosse, WI. Call before your visit to confirm the address.
- What is David Grenda's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does David Grenda accept Medicare assignment?
- Yes. Medicare's clinician data says David Grenda 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 David Grenda?
- (715) 838-5222, as listed in official Medicare / NPI Registry data.
- What is David Grenda's NPI number?
- 1336344928. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David Grenda works
Medicare's Facility Affiliation Data lists David Grenda at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mayo Clinic Health System Eau Claire HospitalEau Claire, WI · Acute Care Hospital · CCN 520070
- Mayo Clinic Health System-Franciscan Medical Center IncLa Crosse, WI · Acute Care Hospital · CCN 520004
- Mayo Clinic Health System-Red Cedar IncMenomonie, WI · Critical Access Hospital · CCN 521340
Practice locations
Addresses where David Grenda is enrolled with Medicare (CMS data updated 2026-10-02).
- 1400 Bellinger StEau Claire, WI 54703 (715) 838‑5222
- 800 W Ave SLa Crosse, WI 54601 (608) 785‑0940
Group practices
Medicare enrollment lists David Grenda as a member of these groups (CMS data updated 2026-10-02).
- Mayo Clinic Health System-Northwest Wisconsin Region Inc802 clinicians in the group
- Mayo Clinic Health System-Southwest Wisconsin Region Inc534 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Eau Claire
Clinicians with the same Medicare primary specialty in Eau Claire, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336344928 |
| 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