Quick answers
- Which hospitals does Donald Willis work at?
- Medicare's official clinician data lists Donald Willis at 1 hospital: CHRISTUS Santa Rosa Hospital-San Marcos. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Donald Willis see patients?
- Medicare's clinician data lists 2 practice locations, including San Marcos, TX. Call before your visit to confirm the address.
- What is Donald Willis's specialty?
- Medicare lists Urology as the primary specialty.
- Does Donald Willis accept Medicare assignment?
- Yes. Medicare's clinician data says Donald Willis accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Donald Willis?
- (512) 396-4400, as listed in official Medicare / NPI Registry data.
- What is Donald Willis's NPI number?
- 1316940372. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Donald Willis works
Medicare's Facility Affiliation Data lists Donald Willis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · CCN 450272
Practice locations
Addresses where Donald Willis is enrolled with Medicare (CMS data updated 2026-10-02).
- 1601 A Redwood RdSan Marcos, TX 78666
- 1601 Redwood Rd ASan Marcos, TX 78666 (512) 396‑4400
Specialties
- Urologyprimary
Other urologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316940372 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians