Quick answers
- Which hospitals does Ronald J. Ostrom work at?
- Medicare's official clinician data lists Ronald J. Ostrom at 3 hospitals: Mercy Hospital, Northern Inyo Hospital and Southern Inyo Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald J. Ostrom see patients?
- Medicare's clinician data lists 5 practice locations, including Taft, CA, Bakersfield, CA and Lone Pine, CA. Call before your visit to confirm the address.
- What is Ronald J. Ostrom's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Ronald J. Ostrom accept Medicare assignment?
- Medicare's clinician data says Ronald J. Ostrom may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Ronald J. Ostrom?
- (661) 765-1935, as listed in official Medicare / NPI Registry data.
- What is Ronald J. Ostrom's NPI number?
- 1730169855. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ronald J. Ostrom works
Medicare's Facility Affiliation Data lists Ronald J. Ostrom at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy HospitalBakersfield, CA · Acute Care Hospital · CCN 050295
- Northern Inyo HospitalBishop, CA · Critical Access Hospital · CCN 051324
- Southern Inyo HospitalLone Pine, CA · Critical Access Hospital · CCN 051302
Practice locations
Addresses where Ronald J. Ostrom is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 E N StTaft, CA 93268 (661) 765‑1935
- 3015 Calloway Dr, Suite D6Bakersfield, CA 93312 (661) 834‑1544
- 501 E Locust StLone Pine, CA 93545 (760) 876‑5501
- 510 E Locust StLone Pine, CA 93545 (760) 876‑1146
- PO Box, Suite 1009Lone Pine, CA 93545
Group practices
Medicare enrollment lists Ronald J. Ostrom as a member of these groups (CMS data updated 2026-10-02).
- Southern Inyo Healthcare District22 clinicians in the group
- West Side Health Care District11 clinicians in the group
- Active Life Medical and Wellness2 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1730169855 |
| 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