Quick answers
- Which hospitals does Nathaniel A. Ponstein work at?
- Medicare's official clinician data lists Nathaniel A. Ponstein at 1 hospital: Sequoia Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathaniel A. Ponstein see patients?
- Medicare's clinician data lists 4 practice locations, including San Mateo, CA, Redwood City, CA and Stanford, CA. Call before your visit to confirm the address.
- What is Nathaniel A. Ponstein's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Nathaniel A. Ponstein accept Medicare assignment?
- Yes. Medicare's clinician data says Nathaniel A. Ponstein 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 Nathaniel A. Ponstein?
- (650) 343-4200, as listed in official Medicare / NPI Registry data.
- What is Nathaniel A. Ponstein's NPI number?
- 1114123775. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathaniel A. Ponstein works
Medicare's Facility Affiliation Data lists Nathaniel A. Ponstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sequoia HospitalRedwood City, CA · Acute Care Hospital · CCN 050197
Practice locations
Addresses where Nathaniel A. Ponstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 123 S San Mateo DrSan Mateo, CA 94401 (650) 343‑4200
- 170 Alameda De Las PulgasRedwood City, CA 94062 (650) 369‑5811
- 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
- 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
Group practices
Medicare enrollment lists Nathaniel A. Ponstein as a member of this group (CMS data updated 2026-10-02).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in San Mateo
Clinicians with the same Medicare primary specialty in San Mateo, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114123775 |
| 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