Quick answers
- Which hospitals does Sydney S. Guo work at?
- Medicare's official clinician data lists Sydney S. Guo at 3 hospitals: Community Memorial Hospital - Ojai, Community Memorial Hospital - Ventura and St Johns Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sydney S. Guo see patients?
- Medicare's clinician data lists 3 practice locations, including Oxnard, CA, Ventura, CA and Santa Barbara, CA. Call before your visit to confirm the address.
- What is Sydney S. Guo's specialty?
- Medicare lists Vascular Surgery as the primary specialty.
- Does Sydney S. Guo accept Medicare assignment?
- Yes. Medicare's clinician data says Sydney S. Guo 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 Sydney S. Guo's NPI number?
- 1619922291. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sydney S. Guo works
Medicare's Facility Affiliation Data lists Sydney S. Guo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Community Memorial Hospital - OjaiOjai, CA · Critical Access Hospital · CCN 051334
- Community Memorial Hospital - VenturaVentura, CA · Acute Care Hospital · CCN 050394
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · CCN 050082
Practice locations
Addresses where Sydney S. Guo is enrolled with Medicare (CMS data updated 2026-10-02).
- 2051 N Solar DrOxnard, CA 93036
- 2605 Loma Vista RdVentura, CA 93003
- 2621 De La Vina StSanta Barbara, CA 93105
Group practices
Medicare enrollment lists Sydney S. Guo as a member of this group (CMS data updated 2026-10-02).
- Kevin M Casey MD Apmc4 clinicians in the group
Specialties
- Vascular Surgeryprimary
Other vascular surgeons in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619922291 |
| 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