Medicare Enrolled

Dr. Ellen Grimm, MD

Nephrology · San Marcos, TX
Practice pattern: Clinical Cardiology — Primarily office-based clinical cardiology
Low-engagement
1330 WONDER WORLD DR, San Marcos, TX 78666
5128050680
In practice since 2006 (20 years)
NPI: 1275500100 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Grimm from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Grimm? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Grimm

Dr. Ellen Grimm is a nephrology specialist in San Marcos, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Grimm performed 861 Medicare services across 357 unique beneficiaries.

Between the years covered by Open Payments, Dr. Grimm received a total of $1,256 from 15 pharmaceutical and/or device companies across 35 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in nephrology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Grimm is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 20 years in practice ▲ 861 Medicare services $1,256 industry payments

Medicare Practice Summary

Medicare Utilization ↗
861
Medicare services
Bottom 38% in TX for nephrology
Lower Medicare volume may reflect subspecialty focus, hospital-based work, or a higher share of non-Medicare patients.
357
Unique beneficiaries
$158
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~43 Medicare services per year of practice

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Dialysis services, 4 or more physician visits per month (20 years or older) 242 $275 $864
Office visit, established patient (30-39 min) 166 $87 $206
Hospital follow-up visit, moderate complexity 148 $62 $141
Dialysis services, 2-3 physician visits per month (20 years or older) 127 $232 $711
Hospital follow-up visit, high complexity 78 $91 $202
Hemodialysis, single evaluation 30 $57 $227
Office visit, established patient (20-29 min) 26 $51 $139
Office visit, established patient, complex (40-54 min) 22 $136 $278
Initial hospital admission, high complexity 22 $134 $393
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.

Industry Payment Transparency

Open Payments through 2024 ↗
$1,256
Total received (2018-2024)
Avg $209/year across 6 years
Bottom 47% in TX for nephrology
15
Companies
35
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →

Payment profile

Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.

Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$1,152 (91.7%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$104 (8.3%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$282
2023
$194
2022
$511
2021
$98
2019
$115
2018
$56

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$182
Fresenius USA Marketing, Inc.
$166
Boston Scientific Corporation
$157
Aurinia Pharma U.S., Inc.
$139
Horizon Therapeutics plc
$137
Vifor Pharma, Inc.
$130
Amgen Inc.
$120
Medtronic, Inc.
$68
Bayer HealthCare Pharmaceuticals Inc.
$41
Outset Medical Inc
$25
Ardelyx, Inc.
$23
NxStage Medical, Inc.
$20
GlaxoSmithKline, LLC.
$16
Shield Therapeutics Inc
$16
Lundbeck LLC
$14
Top 3 companies account for 40.3% of total payments
Associated products mentioned in payments ›
ACCRUFER · BENLYSTA · CRIT-LINE · ELLIPSYS VASCULAR ACCESS SYSTEM · EVUSHELD · FARXIGA · General - Vascular Intervention · IBSRELA · KRYSTEXXA · Kerendia · LOKELMA · LUPKYNIS · NORTHERA · NXSTAGE SYSTEM ONE · PUREFLOW SL · Parsabiv · SYSTEM ONE · Tavneos · Velphoro · WATCHMAN
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →

Most payments (92%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.

Equivalent to $146 per 100 Medicare services performed
Looking for a nephrology specialist in San Marcos?
Compare nephrologists in the San Marcos area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Nephrologists within 10 mi
7
Per 100K population
2.7
County median income
$85,827
Nearest hospital
CHRISTUS SANTA ROSA HOSPITAL-SAN MARCOS
0.0 mi

Data Sources

Provider Registry ✓ NPPES Weekly updates
Medicare Enrollment ✓ PECOS Monthly updates
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments ✓ Open Payments CY 2024
Disciplinary History — Not public N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →

Summary

Dr. Grimm is a clinical cardiology specialist, with moderate Medicare volume, with low-engagement industry engagement, with 20 years of NPI registration.

This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →

Frequently Asked Questions

Is Dr. Grimm experienced with dialysis services, 4 or more physician visits per month (20 years or older)?
Based on Medicare claims data, Dr. Grimm performed 242 dialysis services, 4 or more physician visits per month (20 years or older) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Grimm receive payments from pharmaceutical companies?
Yes. Dr. Grimm received a total of $1,256 from 15 companies across 35 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Grimm's costs compare to other nephrologists in San Marcos?
Dr. Grimm's average Medicare payment per service is $158. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Grimm) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →

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About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →