ELLEN M. GRIMM (MD) – Nephrology Physician, NPI 1275500100
Nephrology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
1,168 NEPHROLOGY in TX
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Provider Addresses for ELLEN M. GRIMM (MD)
12221 N MOPAC EXPY
AUSTIN, TX 787582401
Phone: (512) 805-0680
Fax: (512) 805-0682
Type: Mailing
West Wonder World Drive, San Marcos, Hays County, Texas, 78666, United States
SAN MARCOS, TX 786667566
Phone: (512) 805-0680
Fax: (512) 805-0682
Type: Location
Mopac Expressway, Austin, Travis County, Texas, 78739, United States
AUSTIN, TX 787582483
Phone: (512) 805-0680
Fax: (512) 805-0682
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 13 Open Payments records for all available years, with a total value of $476.
Total Amount is formed as General ($476) + Research ($0) + Ownership ($0) = $476.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Fresenius USA Marketing, Inc. ($124).
Total Amount
$476
General + Research + Ownership
Payments
13
Total payment records
General Amount
$476
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Fresenius USA Marketing, Inc. | $124 |
| Aurinia Pharma U.S., Inc. | $120 |
| AstraZeneca Pharmaceuticals LP | $100 |
| Medtronic, Inc. | $68 |
| Outset Medical Inc | $25 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-01-30
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20090130000095 | I | Nephrology | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 242 | 37 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 166 | 92 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 148 | 66 | $0 |
| 90961 | Dialysis services, 2-3 physician visits per month (20 years or older) | 127 | 35 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 78 | 50 | $0 |
Insurance plans in this area (ZIP 78758)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | TX | |
| - | TX | |
| - | TX | |
| - | TX | |
| Nurse Practitioner | TX | |
| - | TX | |
| - | TX | |
| Nurse Practitioner | TX | |
| Family Practice | TX | |
| Family Practice | TX |
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