Quick answers
- Which hospitals does Carl K. Jonokuchi work at?
- Medicare's official clinician data lists Carl K. Jonokuchi at 4 hospitals: Adventist Health Simi Valley, Los Robles Hospital & Medical Center, Northridge Hospital Medical Center and St Johns Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Carl K. Jonokuchi see patients?
- Medicare's clinician data lists 3 practice locations, including Oxnard, CA, Camarillo, CA and Thousand Oaks, CA. Call before your visit to confirm the address.
- What is Carl K. Jonokuchi's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Carl K. Jonokuchi accept Medicare assignment?
- Yes. Medicare's clinician data says Carl K. Jonokuchi 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 Carl K. Jonokuchi offer telehealth?
- Medicare's clinician data says Carl K. Jonokuchi offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Carl K. Jonokuchi?
- (805) 485-7877, as listed in official Medicare / NPI Registry data.
- What is Carl K. Jonokuchi's NPI number?
- 1528027497. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Carl K. Jonokuchi works
Medicare's Facility Affiliation Data lists Carl K. Jonokuchi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · CCN 050236
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · CCN 050116
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · CCN 050082
Practice locations
Addresses where Carl K. Jonokuchi is enrolled with Medicare (CMS data updated 2026-10-02).
- 1700 N Rose Ave, Suite 350Oxnard, CA 93030 (805) 485‑7877
- 3901 Las Posas Rd, Suite 10Camarillo, CA 93010 (805) 918‑4476
- 550 Saint Charles Dr, Suite 200Thousand Oaks, CA 91360 (805) 497‑4545
Group practices
Medicare enrollment lists Carl K. Jonokuchi as a member of this group (CMS data updated 2026-10-02).
- Dignity Health Medical Foundation1,184 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1528027497 |
| 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