Quick answers
- Which hospitals does Mark R. Fowler work at?
- Medicare's official clinician data lists Mark R. Fowler at 4 hospitals: Community Memorial Hospital - Ojai, Community Memorial Hospital - Ventura, St Johns Regional Medical Center and Ventura County Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark R. Fowler see patients?
- Medicare's clinician data lists 2 practice locations, including Ojai, CA and Ventura, CA. Call before your visit to confirm the address.
- What is Mark R. Fowler's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Mark R. Fowler accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Fowler 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 Mark R. Fowler?
- (760) 522-2849, as listed in official Medicare / NPI Registry data.
- What is Mark R. Fowler's NPI number?
- 1508393257. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark R. Fowler works
Medicare's Facility Affiliation Data lists Mark R. Fowler 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
- Ventura County Medical CenterVentura, CA · Acute Care Hospital · CCN 050159
Practice locations
Addresses where Mark R. Fowler is enrolled with Medicare (CMS data updated 2026-10-02).
- 1306 Maricopa HwyOjai, CA 93023 (760) 522‑2849
- 147 N Brent StVentura, CA 93003 (760) 522‑2849
Group practices
Medicare enrollment lists Mark R. Fowler as a member of this group (CMS data updated 2026-10-02).
- Dr Brad Barrows Inc3 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508393257 |
| 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