Quick answers
- Which hospitals does Mark B. Ashby work at?
- Medicare's official clinician data lists Mark B. Ashby at 3 hospitals: Chino Valley Medical Center, Desert Valley Hospital and Sierra View Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark B. Ashby see patients?
- Medicare's clinician data lists 2 practice locations, including Porterville, CA and Inglewood, CA. Call before your visit to confirm the address.
- What is Mark B. Ashby's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mark B. Ashby accept Medicare assignment?
- Yes. Medicare's clinician data says Mark B. Ashby 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 Mark B. Ashby offer telehealth?
- Medicare's clinician data says Mark B. Ashby offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark B. Ashby?
- (559) 784-1110, as listed in official Medicare / NPI Registry data.
- What is Mark B. Ashby's NPI number?
- 1093060386. 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 B. Ashby works
Medicare's Facility Affiliation Data lists Mark B. Ashby at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chino Valley Medical CenterChino, CA · Acute Care Hospital · CCN 050586
- Desert Valley HospitalVictorville, CA · Acute Care Hospital · CCN 050709
- Sierra View Medical CenterPorterville, CA · Acute Care Hospital · CCN 050261
Practice locations
Addresses where Mark B. Ashby is enrolled with Medicare (CMS data updated 2026-10-02).
- 465 W Putnam AvePorterville, CA 93257 (559) 784‑1110
- 645 Aerick St, Suite 3Inglewood, CA 90301 (310) 431‑4926
Group practices
Medicare enrollment lists Mark B. Ashby as a member of these groups (CMS data updated 2026-10-02).
- Central Valley Emergency Medicine26 clinicians in the group
- Ca Physician Assistant Cooperative Healthcare PC2 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Porterville
Clinicians with the same Medicare primary specialty in Porterville, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1093060386 |
| 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