Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Donald L. Willis, MD

Individual provider Urology Physician · NPI 1316940372

Donald L. Willis, MD is an Urology in San Marcos, Texas. Graduated from University of Texas Medical Branch at Galveston in 1983, 43 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
43
Trained at
University of Texas Medical Branch at Galveston
Licensed in
TX
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1601 Redwood Rd Ste A
San Marcos, TX 78666-1423
Phone: (512) 396-4400
Fax: (512) 396-4403
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Urology Physician (primary) Taxonomy 208800000X · Licence G5783 (TX)

Record details

NPI number1316940372
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 24, 2005
Last updated in NPPESJuly 6, 2010
Mailing address1601 Redwood Rd, Ste A, San Marcos, TX 78666-1423

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyUROLOGY
Medical schoolUNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON
Graduated 1983 (43 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare