Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Siniva Lynne Helliwell, M.D.

Gynecology Physician in Bakersfield, CA · enumerated 2006 · practices at Advanced Womens Health Center, A Medical Corporation.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1275561060

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Registry record

Entity type Individual (Type 1)

Name Mrs. Siniva Lynne Helliwell

Credential M.D.

Sex Female

Practice address 8501 Brimhall Rd Ste 300, Bakersfield, CA, 93312

Phone (661) 410-2942

Fax (661) 410-0135

Enumeration date Jun 29, 2006

Last updated in NPPES Nov 9, 2015

Taxonomy & licenses

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License A82543 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A825430	Medicaid	CA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Siniva Helliwell?

The National Provider Identifier (NPI) for Siniva Helliwell is 1275561060, a Type 1 (individual) record in the CMS NPPES registry.

Where does Siniva Helliwell practice?

The practice location on file with NPPES is in Bakersfield, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Jason Helliwell Obstetrics & Gynecology Physician · Bakersfield, CA NPI 1790768653 David Christian Family Medicine Physician · Bakersfield, CA NPI 1154353951 Advanced Womens Health Center, A Medical Corporation Obstetrics & Gynecology Physician · Bakersfield, CA NPI 1801962345 Pamela Whiteley Physician Assistant · Bakersfield, CA NPI 1962838540 May Bonnin Women's Health Nurse Practitioner · Bakersfield, CA NPI 1295204204 Emmely Mongcal Family Nurse Practitioner · Bakersfield, CA NPI 1063391092

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-09.