Donald L. Willis, M.D.
Urology Physician · San Marcos, TX
Donald L. Willis, M.D. is a urology physician with a practice address in San Marcos, Texas, and NPI 1316940372, issued on May 24, 2005. Check the license (Texas G5783, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Donald L. Willis
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- G5783 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Redwood RD, San Marcos, TX 78666
- Phone
- (512) 396-4400
- Enumerated
- May 24, 2005
- Record last updated
- Jul 6, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (512) 396-4403
- Medicare enrollment
- Enrolled (PECOS I20100826000183); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1983
- Entity
- Type 1 · individual
8 nearest urology physician records → All 960 in Texas → Look up another NPI →
Also registered at 1601 Redwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Jennings, M.D.Orthopaedic Surgery Physician1205985942
Verify Donald L. Willis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G5783Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% more Medicare Part D claims than the average urology physician in 2024
1,830 Medicare Part D claims for 396 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 16 claims were for opioids.
Most prescribed
- Tamsulosin Hcl467 claims
- Finasteride301 claims
- Alfuzosin Hcl Er142 claims
- Oxybutynin Chloride Er101 claims
- Myrbetriq92 claims
- Ciprofloxacin Hcl82 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 MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $456.12
5 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 9,340 providers of this specialty with any payment received $3,800.04 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.
Donald L. Willis among 960 urology physician records in Texas
Donald L. Willis, M.D. is one of 960 urology physician records with a practice address in Texas. 82% 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, 82% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1983 · median 2004 among the 667 with a school on file
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in Texas
There are 960 urology physician records in Texas.
All 960 in Texas → Every provider in San Marcos → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Ashley Hadaway, M.D.Round Rock, TX 786651952662280
- Juan Herrera, MDRound Rock, TX 786651740605955
- Lucas Jacomides, MDRound Rock, TX 786651750381620
- Juzar Jamnagerwalla, MDRound Rock, TX 786651477969673
- Ilana Mendelow, MDRound Rock, TX 786651972860096
- Nathaniel Polnaszek, MDRound Rock, TX 786651932384872
- Monica Sridhar, MDRound Rock, TX 786651225692429
- Jeffrey Miller, M.D.Round Rock, TX 786641861474942
Common questions
What is Donald L. Willis, M.D.'s NPI number?
Donald L. Willis, M.D.'s National Provider Identifier (NPI) is 1316940372, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Donald L. Willis, M.D. located?
The NPPES record lists a practice address at 1601 Redwood RD, San Marcos, TX, 78666. Phone: (512) 396-4400. Providers update this record themselves, so call before visiting.
How can I verify Donald L. Willis, M.D.'s license?
NPPES lists Texas license number G5783, 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 Donald L. Willis, M.D. prescribe under Medicare Part D?
In 2024, Donald L. Willis, M.D. had 1,830 Medicare Part D claims for 396 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is Donald L. Willis, M.D.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. 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.