Quick answers
- Which hospitals does Robert A. Zajac work at?
- Medicare's official clinician data lists Robert A. Zajac at 5 hospitals: Baptist Medical Center, Connally Memorial Medical Center, Medina Regional Hospital, Methodist Hospital Stone Oak and Peterson Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert A. Zajac see patients?
- Medicare's clinician data lists 1 practice location in San Antonio, TX. Call before your visit to confirm the address.
- What is Robert A. Zajac's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Robert A. Zajac accept Medicare assignment?
- Yes. Medicare's clinician data says Robert A. Zajac 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.
- Does Robert A. Zajac offer telehealth?
- Medicare's clinician data says Robert A. Zajac offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Robert A. Zajac?
- (210) 481-2800, as listed in official Medicare / NPI Registry data.
- What is Robert A. Zajac's NPI number?
- 1013907963. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert A. Zajac works
Medicare's Facility Affiliation Data lists Robert A. Zajac at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baptist Medical CenterSan Antonio, TX · Acute Care Hospital · CCN 450058
- Connally Memorial Medical CenterFloresville, TX · Acute Care Hospital · CCN 450108
- Medina Regional HospitalHondo, TX · Critical Access Hospital · CCN 451330
- Methodist Hospital Stone OakSan Antonio, TX · Acute Care Hospital · CCN 670055
- Peterson Regional Medical CenterKerrville, TX · Acute Care Hospital · CCN 450007
Practice locations
Addresses where Robert A. Zajac is enrolled with Medicare (CMS data updated 2026-10-02).
- 150 E Sonterra Blvd, Suite 170San Antonio, TX 78258 (210) 481‑2800
Group practices
Medicare enrollment lists Robert A. Zajac as a member of this group (CMS data updated 2026-10-02).
- Robert a Zajac MD PA6 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Louisiana State University School Of Medicine In New Orleans |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1013907963 |
| 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