Quick answers
- Which hospitals does Carlos Zem work at?
- Medicare's official clinician data lists Carlos Zem at 3 hospitals: Baptist Medical Center, Methodist Hospital and Methodist Hospital Stone Oak. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Carlos Zem see patients?
- Medicare's clinician data lists 1 practice location in San Antonio, TX. Call before your visit to confirm the address.
- What is Carlos Zem's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Carlos Zem accept Medicare assignment?
- Yes. Medicare's clinician data says Carlos Zem 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 Carlos Zem offer telehealth?
- Medicare's clinician data says Carlos Zem offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Carlos Zem?
- (210) 226-2001, as listed in official Medicare / NPI Registry data.
- What is Carlos Zem's NPI number?
- 1437237914. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Carlos Zem works
Medicare's Facility Affiliation Data lists Carlos Zem 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
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · CCN 450388
- Methodist Hospital Stone OakSan Antonio, TX · Acute Care Hospital · CCN 670055
Practice locations
Addresses where Carlos Zem is enrolled with Medicare (CMS data updated 2026-10-02).
- 1123 N Main Ave, Suite 120San Antonio, TX 78212 (210) 226‑2001
Group practices
Medicare enrollment lists Carlos Zem as a member of this group (CMS data updated 2026-10-02).
- Renal Associates, P.A.40 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437237914 |
| 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