Quick answers
- Which hospitals does Douglas A. Friesen work at?
- Medicare's official clinician data lists Douglas A. Friesen at 1 hospital: Sierra View Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas A. Friesen see patients?
- Medicare's clinician data lists 2 practice locations, including Porterville, CA and Fort Mohave, AZ. Call before your visit to confirm the address.
- What is Douglas A. Friesen's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Douglas A. Friesen accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas A. Friesen 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 Douglas A. Friesen?
- (559) 784-1110, as listed in official Medicare / NPI Registry data.
- What is Douglas A. Friesen's NPI number?
- 1124096987. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Douglas A. Friesen works
Medicare's Facility Affiliation Data lists Douglas A. Friesen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sierra View Medical CenterPorterville, CA · Acute Care Hospital · CCN 050261
Practice locations
Addresses where Douglas A. Friesen is enrolled with Medicare (CMS data updated 2026-10-02).
- 465 W Putnam AvePorterville, CA 93257 (559) 784‑1110
- 5330 S Hwy 95Fort Mohave, AZ 86426 (928) 788‑2273
Group practices
Medicare enrollment lists Douglas A. Friesen as a member of these groups (CMS data updated 2026-10-02).
- Valley Regional Anesthesia Associates Inc146 clinicians in the group
- Sda Services of Ca71 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Porterville
Clinicians with the same Medicare primary specialty in Porterville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124096987 |
| 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