William K. Deschner, M.D.
NPI 1023003563ActiveIndividual· Internal Medicine, Gastroenterology· San Marcos, TX
Internal Medicine, Gastroenterology (M.D.) in San Marcos, Texas, trained at Baylor College of Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $898,359 for 1,599 claims, against $221,498 paid for services in 2024. Abbvie Inc. was the largest of 16 companies reporting payments in 2025, $1,613 in all, mostly food and beverage.
Overview
| NPI | 1023003563 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 12, 2005 |
| Last updated in NPPES | Feb 16, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G4977 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 707 |
|---|---|
| Services billed | 6,499 across 48 procedure codes |
| Paid by Medicare | $221,498 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,599 · 3,051 30-day fills |
|---|---|
| Patients | 656 |
| Total drug cost | $898,359 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Texas Digestive Disease Consultants, PLLCFlower Mound, TX · 608 clinicians
Hospital affiliations
- Ascension Seton Edgar B DavisLuling, TX
- Christus Santa Rosa Hospital-San MarcosSan Marcos, TX
- Guadalupe Regional Medical CenterSeguin, TX
- Memorial HospitalGonzales, TX
- Resolute Health HospitalNew Braunfels, TX
Industry payments (Open Payments)
- 2025$1,613 · 78 payments from 16 companies
- 2024$2,193 · 106 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $585.20 | 40 |
| Gilead Sciences, Inc. | $220.63 | 12 |
| Atricure, Inc. | $137.72 | 1 |
| Qol Medical, LLC | $124.11 | 4 |
| Echosens North America, Inc. | $112.90 | 1 |
What the 2025 payments were for
- Food and Beverage$1,613 · 78 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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