Quick answers
- Which hospitals does Siniva L. Helliwell work at?
- Medicare's official clinician data lists Siniva L. Helliwell at 2 hospitals: Adventist Health Bakersfield and Adventist Health Tehachapi Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Siniva L. Helliwell see patients?
- Medicare's clinician data lists 1 practice location in Bakersfield, CA. Call before your visit to confirm the address.
- What is Siniva L. Helliwell's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Siniva L. Helliwell accept Medicare assignment?
- Yes. Medicare's clinician data says Siniva L. Helliwell 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 Siniva L. Helliwell?
- (661) 410-2942, as listed in official Medicare / NPI Registry data.
- What is Siniva L. Helliwell's NPI number?
- 1275561060. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Siniva L. Helliwell works
Medicare's Facility Affiliation Data lists Siniva L. Helliwell at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health BakersfieldBakersfield, CA · Acute Care Hospital · CCN 050455
- Adventist Health Tehachapi ValleyTehachapi, CA · Critical Access Hospital · CCN 051301
Practice locations
Addresses where Siniva L. Helliwell is enrolled with Medicare (CMS data updated 2026-10-02).
- 8501 Brimhall Rd, Suite 300Bakersfield, CA 93312 (661) 410‑2942
Group practices
Medicare enrollment lists Siniva L. Helliwell as a member of this group (CMS data updated 2026-10-02).
- Advanced Womens Health Center a Medical Corporation2 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Bakersfield
Clinicians with the same Medicare primary specialty in Bakersfield, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275561060 |
| 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