Margaret Eileen Cook, MD
NPI 1932174299ActiveIndividual· Internal Medicine, Nephrology· Austin, TX
Internal Medicine, Nephrology (MD) in Austin, Texas, trained at University of Oklahoma College of Medicine (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $443,503 for 2,285 claims, against $134,731 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 14 companies reporting payments in 2025, $982.14 in all, mostly food and beverage.
Overview
| NPI | 1932174299 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 21, 2006 |
| Last updated in NPPES | Jan 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | K6827 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 285 |
|---|---|
| Services billed | 2,854 across 65 procedure codes |
| Paid by Medicare | $134,731 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,285 · 4,812 30-day fills |
|---|---|
| Patients | 271 |
| Total drug cost | $443,503 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- The Austin Diagnostic Clinic PLLCCedar Park, TX · 86 clinicians
Hospital affiliations
- North Austin Medical CenterAustin, TX
- Round Rock Medical CenterRound Rock, TX
- St David's Medical CenterAustin, TX
Other facilities
- Nna - NorthDialysis facility · Austin, TX
Industry payments (Open Payments)
- 2025$982.14 · 39 payments from 14 companies
- 2024$1,100 · 52 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $272.11 | 12 |
| Novartis Pharmaceuticals Corporation | $163.25 | 6 |
| Fresenius USA Marketing, Inc. | $126.94 | 3 |
| Amgen Inc. | $101.32 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $52.54 | 2 |
What the 2025 payments were for
- Food and Beverage$982.14 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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