Quick answers
- Which hospitals does Ellen M. Grimm work at?
- Medicare's official clinician data lists Ellen M. Grimm at 4 hospitals: Ascension Seton Hays, CHRISTUS Santa Rosa Hospital-San Marcos, St David's Medical Center and St David's South Austin Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ellen M. Grimm see patients?
- Medicare's clinician data lists 11 practice locations, including Austin, TX, San Marcos, TX and Lockhart, TX. Call before your visit to confirm the address.
- What is Ellen M. Grimm's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Ellen M. Grimm accept Medicare assignment?
- Yes. Medicare's clinician data says Ellen M. Grimm 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 Ellen M. Grimm offer telehealth?
- Medicare's clinician data says Ellen M. Grimm offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ellen M. Grimm?
- (512) 901-1111, as listed in official Medicare / NPI Registry data.
- What is Ellen M. Grimm's NPI number?
- 1275500100. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ellen M. Grimm works
Medicare's Facility Affiliation Data lists Ellen M. Grimm at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Seton HaysKyle, TX · Acute Care Hospital · CCN 670056
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · CCN 450272
- St David's Medical CenterAustin, TX · Acute Care Hospital · CCN 450431
- St David's South Austin Medical CenterAustin, TX · Acute Care Hospital · CCN 450713
Practice locations
Addresses where Ellen M. Grimm is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 11; the Medicare profile lists all.
- 12221 N Mopac Expy, Department of Laboratory ServicesAustin, TX 78758 (512) 901‑1111
- 1301 Wonder World Dr, Central Texas Medical CenterSan Marcos, TX 78666 (512) 753‑3566
- 1330 Wonder World Dr, Suite 101San Marcos, TX 78666 (512) 805‑0680
- 1340 Wonder World Dr, 4100 Fresenius Kidney Care San MarcosSan Marcos, TX 78666 (512) 878‑2420
- 1721 S Colorado StLockhart, TX 78644 (512) 398‑6357
Group practices
Medicare enrollment lists Ellen M. Grimm as a member of this group (CMS data updated 2026-10-02).
- The Austin Diagnostic Clinic PLLC86 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1992 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275500100 |
| 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