Quick answers
- Which hospitals does John Zwiener work at?
- Medicare's official clinician data lists John Zwiener at 1 hospital: Carlsbad Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Zwiener see patients?
- Medicare's clinician data lists 1 practice location in Carlsbad, NM. Call before your visit to confirm the address.
- What is John Zwiener's specialty?
- Medicare lists Pathology as the primary specialty.
- Does John Zwiener accept Medicare assignment?
- Yes. Medicare's clinician data says John Zwiener 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 John Zwiener?
- (505) 887-4133, as listed in official Medicare / NPI Registry data.
- What is John Zwiener's NPI number?
- 1518038496. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Zwiener works
Medicare's Facility Affiliation Data lists John Zwiener at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Carlsbad Medical CenterCarlsbad, NM · Acute Care Hospital · CCN 320063
Practice locations
Addresses where John Zwiener is enrolled with Medicare (CMS data updated 2026-10-02).
- 2430 W Pierce StCarlsbad, NM 88220 (505) 887‑4133
Specialties
- Pathologyprimary
Other pathologists in New Mexico
Clinicians with the same Medicare primary specialty in New Mexico — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518038496 |
| 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