Quick answers
- Which hospitals does James R. Halverson work at?
- Medicare's official clinician data lists James R. Halverson at 2 hospitals: Community Memorial Hospital - Ojai and Community Memorial Hospital - Ventura. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James R. Halverson see patients?
- Medicare's clinician data lists 4 practice locations, including Ventura, CA, Ojai, CA and Camarillo, CA. Call before your visit to confirm the address.
- What is James R. Halverson's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does James R. Halverson accept Medicare assignment?
- Yes. Medicare's clinician data says James R. Halverson 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 James R. Halverson?
- (805) 647-7704, as listed in official Medicare / NPI Registry data.
- What is James R. Halverson's NPI number?
- 1720044787. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James R. Halverson works
Medicare's Facility Affiliation Data lists James R. Halverson 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
Practice locations
Addresses where James R. Halverson is enrolled with Medicare (CMS data updated 2026-10-02).
- 10885 Telegraph RdVentura, CA 93004 (805) 647‑7704
- 117 Pirie Rd, Suite DOjai, CA 93023 (805) 646‑7246
- 3555 Loma Vista Rd, Suite 110Ventura, CA 93003 (805) 653‑0303
- 888 W Ventura Blvd, Suite ACamarillo, CA 93010 (805) 383‑7701
Group practices
Medicare enrollment lists James R. Halverson as a member of this group (CMS data updated 2026-10-02).
- Primary Medical Group of Ventura County Inc41 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Ventura
Clinicians with the same Medicare primary specialty in Ventura, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Duke University School Of Medicine |
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720044787 |
| 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