Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Olena Nikonovna Hays, PA

Physician Assistant in Citrus Heights, CA · enumerated 2008.

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

National Provider Identifier

1487831491

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Registry record

Entity type Individual (Type 1)

Name Olena Nikonovna Hays

Credential PA

Sex Female

Practice address 7777 Sunrise Blvd, Suite 2500, Citrus Heights, CA, 95610

Phone (916) 722-2227

Fax (877) 860-5422

Enumeration date Jan 22, 2008

Last updated in NPPES Dec 21, 2022

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA19547 (CA) Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA credential

Other identifiers

Identifier	Type	State	Issuer
P01453355-DV5277	Other	CA	RAILROAD MEDICARE
EFF: 2/20/2013	Medicaid	CA	-
PA19547	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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Olena Hays?

Olena Hays is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Steven Blizzard Physician Assistant · Citrus Heights, CA NPI 1497814115 Thomas Mahoney Family Medicine Physician · Citrus Heights, CA NPI 1184867814 Joseph M Molina MD Professional Corporation-Southern California Family Medicine Physician · Citrus Heights, CA NPI 1508279779 Joseph M Molina MD Professional Corporation Southern California Non-Pharmacy Dispensing Site · Citrus Heights, CA NPI 1154709301 Genelle Guevarra-Shams General Practice Dentistry · Citrus Heights, CA NPI 1790358422

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-21.