Dr. William K. Deschner, M.D.
Gastroenterology (Gastroenterology Physician)
- Medicare participating
At a glance
- Medical school
- Baylor College of Medicine (1983)
- Years since graduation
- 43
- In the NPI registry since
- 2005
- Medicare patients seen, 2024
- 707
Licensed in Texas since 1983, according to the Texas Medical Board. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1983Medical school: Baylor College of Medicine
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Gastroenterology Physician primary
TX license G4977 (first issued 1983; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Christus Santa Rosa Hospital-San Marcos San Marcos, TX
- Guadalupe Regional Medical Center Seguin, TX
- Resolute Health Hospital New Braunfels, TX
- Memorial Hospital Gonzales, TX
- Ascension Seton Edgar B Davis Luling, TX
Medical groups
- Texas Digestive Disease Consultants, PLLC (608 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 707
- Services billed
- 6,499
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Injection, vedolizumab, 1 mg | 5,100 | 12 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 167 | 167 |
| Biopsy of large bowel using a flexible endoscope | 156 | 156 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 126 | 124 |
| Established patient office or other outpatient visit, 20-29 minutes | 122 | 118 |
| Established patient office or other outpatient visit, 30-39 minutes | 102 | 97 |
| New patient office or other outpatient visit, 45-59 minutes | 63 | 63 |
| Insertion of guide wire with dilation of esophagus using a flexible endoscope | 61 | 60 |
| Colorectal cancer screening; colonoscopy on individual at high risk | 47 | 47 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 29 | 29 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Omeprazole Other prescribers in San Marcos, TX | 514 |
| Pantoprazole Sodium Other prescribers in San Marcos, TX | 213 |
| Clenpiq (sod picosulf/mag ox/citric ac) | 182 |
| Peg 3350-Electrolyte (sodium chloride/nahco3/kcl/peg) | 46 |
| Peg-3350 And Electrolytes (peg3350/sod sulf,bicarb,cl/kcl) Other prescribers in San Marcos, TX | 45 |
| Budesonide Dr (budesonide) Other prescribers in San Marcos, TX | 44 |
| Mesalamine Other prescribers in San Marcos, TX | 43 |
| Gavilyte-G (peg3350/sod sulf,bicarb,cl/kcl) Other prescribers in San Marcos, TX | 41 |
| Ursodiol Other prescribers in San Marcos, TX | 39 |
| Zenpep (lipase/protease/amylase) Other prescribers in San Marcos, TX | 34 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 16 companies reported 78 payments worth $1,613 in total to this clinician.
| AbbVie Inc. | $585 |
|---|---|
| Gilead Sciences, Inc. | $221 |
| Atricure, Inc. | $138 |
| Qol Medical, LLC | $124 |
| Echosens North America, Inc. | $113 |
| Regeneron Healthcare Solutions, Inc. | $71.11 |
| Lilly USA, LLC | $66.49 |
| Madrigal Pharmaceuticals | $58.53 |
| Food and Beverage | $1,613 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.