Quick answers
- Which hospitals does Robert W. Ziering work at?
- Medicare's official clinician data lists Robert W. Ziering at 1 hospital: Tri-City Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert W. Ziering see patients?
- Medicare's clinician data lists 3 practice locations, including Vista, CA, Chula Vista, CA and La Jolla, CA. Call before your visit to confirm the address.
- What is Robert W. Ziering's specialty?
- Medicare lists Allergy/Immunology as the primary specialty.
- Does Robert W. Ziering accept Medicare assignment?
- Yes. Medicare's clinician data says Robert W. Ziering 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 Robert W. Ziering?
- (760) 941-4444, as listed in official Medicare / NPI Registry data.
- What is Robert W. Ziering's NPI number?
- 1215933148. 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 W. Ziering works
Medicare's Facility Affiliation Data lists Robert W. Ziering at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Tri-City Medical CenterOceanside, CA · Acute Care Hospital · CCN 050128
Practice locations
Addresses where Robert W. Ziering is enrolled with Medicare (CMS data updated 2026-10-02).
- 2067 W Vista Way, Suite 140Vista, CA 92083 (760) 941‑4444
- 910 Hale Pl, Suite 110Chula Vista, CA 91914 (619) 704‑7577
- 9850 Genesee Ave, Suite 710La Jolla, CA 92037 (858) 260‑2977
Group practices
Medicare enrollment lists Robert W. Ziering as a member of these groups (CMS data updated 2026-10-02).
- Modena Allergy and Asthma Inc.26 clinicians in the group
- Modena Allergy and Asthma II Inc.7 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1974 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215933148 |
| 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