Quick answers
- Which hospitals does Jeffrey S. Kopstein work at?
- Medicare's official clinician data lists Jeffrey S. Kopstein at 2 hospitals: 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 Jeffrey S. Kopstein see patients?
- Medicare's clinician data lists 3 practice locations, including Oxnard, CA and Camarillo, CA. Call before your visit to confirm the address.
- What is Jeffrey S. Kopstein's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Jeffrey S. Kopstein accept Medicare assignment?
- Yes. Medicare's clinician data says Jeffrey S. Kopstein 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 Jeffrey S. Kopstein offer telehealth?
- Medicare's clinician data says Jeffrey S. Kopstein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jeffrey S. Kopstein?
- (805) 988-2500, as listed in official Medicare / NPI Registry data.
- What is Jeffrey S. Kopstein's NPI number?
- 1487041158. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jeffrey S. Kopstein works
Medicare's Facility Affiliation Data lists Jeffrey S. Kopstein 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 - VenturaVentura, CA · Acute Care Hospital · CCN 050394
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · CCN 050082
Practice locations
Addresses where Jeffrey S. Kopstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 1600 N Rose AveOxnard, CA 93030 (805) 988‑2500
- 2100 Solar Dr, Suite 202Oxnard, CA 93036 (805) 431‑1118
- 2309 Antonio AveCamarillo, CA 93010 (805) 389‑5800
Group practices
Medicare enrollment lists Jeffrey S. Kopstein as a member of this group (CMS data updated 2026-10-02).
- Inpatient Specialists of California PC385 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1487041158 |
| 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