William Lee Shaffer, M.D.
NPI 1972506913ActiveIndividual· Internal Medicine, Nephrology· Corpus Christi, TX
Internal Medicine, Nephrology (M.D.) in Corpus Christi, Texas, trained at University of Texas Medical Branch at Galveston (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $1,138,119 for 3,437 claims, against $125,822 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 7 companies reporting payments in 2025, $308.54 in all, mostly food and beverage.
Overview
| NPI | 1972506913 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 23, 2005 |
| Last updated in NPPES | Apr 22, 2020 |
| Certified by provider | Apr 22, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G0101 | 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 | 271 |
|---|---|
| Services billed | 1,024 across 15 procedure codes |
| Paid by Medicare | $125,822 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,437 · 5,609 30-day fills |
|---|---|
| Patients | 382 |
| Total drug cost | $1,138,119 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Kidney Specialists of South Texas, P.A.Corpus Christi, TX · 9 clinicians
Hospital affiliation
- Christus Spohn Hospital Corpus ChristiCorpus Christi, TX
Other facilities
- Davita Coastal at HomeDialysis facility · Corpus Christi, TX
- Davita Greenwood Holly Renal CenterDialysis facility · Corpus Christi, TX
- Davita Morgan Avenue DialysisDialysis facility · Corpus Christi, TX
- Davita Riverside Renal CenterDialysis facility · Robstown, TX
- Davita Southside DialysisDialysis facility · Corpus Christi, TX
Industry payments (Open Payments)
- 2025$308.54 · 14 payments from 7 companies
- 2024$330.63 · 17 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $85.73 | 4 |
| Amgen Inc. | $75.66 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $59.69 | 3 |
| Medtronic, Inc. | $27.92 | 1 |
| Glaxosmithkline, LLC. | $21.43 | 1 |
What the 2025 payments were for
- Food and Beverage$308.54 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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