William K. Deschner, M.D.
Gastroenterology Physician · San Marcos, TX
William K. Deschner, M.D. is a gastroenterology physician with a practice address in San Marcos, Texas, and NPI 1023003563, issued on Sep 12, 2005. Check the license (Texas G4977, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- William K. Deschner
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G4977 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1305 Wonder World Dr, San Marcos, TX 78666
- Phone
- (512) 754-8676
- Enumerated
- Sep 12, 2005
- Record last updated
- Feb 16, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (512) 754-8680
- Medicare enrollment
- Enrolled (PECOS I20081125000794); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →
Also registered at 1305 Wonder World Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Alexander, CRNACertified Registered Nurse Anesthetist1396770590
- John Cluley, M.D.Gastroenterology Physician1790915858
- Edward Coles, M.D.Gastroenterology Physician1912991621
- Donna Dolan, MDInternal Medicine Physician1831134824
- Carol Garner, MSN,CS,FNPFamily Nurse Practitioner1295734036
- Joelle GironNurse Practitioner1548958093
Verify William K. Deschner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G4977Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% more Medicare Part D claims than the average gastroenterology physician in 2024
1,599 Medicare Part D claims for 656 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Omeprazole514 claims
- Pantoprazole Sodium213 claims
- Clenpiq182 claims
- Peg 3350-Electrolyte46 claims
- Peg-3350 And Electrolytes45 claims
- Budesonide Dr44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,192.63
106 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Texas Digestive Disease Consultants, PLLCSan Marcos, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William K. Deschner among 1,478 gastroenterology physician records in Texas
William K. Deschner, M.D. is one of 1,478 gastroenterology physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1983 · median 2003 among the 1,175 with a school on file
- Record last updated2017 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Texas
There are 1,478 gastroenterology physician records in Texas.
All 1,478 in Texas → Every provider in San Marcos → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Anita Bhagavathula, DOSan Marcos, TX 786661740777630
- John Cluley, M.D.San Marcos, TX 786661790915858
- Edward Coles, M.D.San Marcos, TX 786661912991621
- Thomas Kepczyk, M.D.San Marcos, TX 786661629062344
- Shannon Marek, M.D.San Marcos, TX 786661528282050
- Carlos Neghme, M.D.San Marcos, TX 786661215921937
- Minh Thu Nguyen, MDSan Marcos, TX 786661629633474
- Steven Pearce, M.D.San Marcos, TX 786661467735704
Common questions
What is William K. Deschner, M.D.'s NPI number?
William K. Deschner, M.D.'s National Provider Identifier (NPI) is 1023003563, issued on Sep 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William K. Deschner, M.D. located?
The NPPES record lists a practice address at 1305 Wonder World Dr, San Marcos, TX, 78666. Phone: (512) 754-8676. Providers update this record themselves, so call before visiting.
How can I verify William K. Deschner, M.D.'s license?
NPPES lists Texas license number G4977, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William K. Deschner, M.D. prescribe under Medicare Part D?
In 2024, William K. Deschner, M.D. had 1,599 Medicare Part D claims for 656 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is William K. Deschner, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.