Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Olivia Faeth Hasselfeld, PA

Physician Assistant in O Fallon, MO · enumerated 2020 · practices at Progress West Healthcare Center.

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

National Provider Identifier

1194334094

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Registry record

Entity type Individual (Type 1)

Name Ms. Olivia Faeth Hasselfeld

Credential PA

Sex Female

Practice address 2 Progress Point Pkwy, Div Im Medical Oncology, O Fallon, MO, 63368

Phone (800) 647-2098

Fax (314) 362-3192

Enumeration date Jul 27, 2020

Last updated in NPPES Apr 17, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 2020026369 (MO) 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
220117552	Medicaid	MO	-

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

How do I verify Olivia Hasselfeld's NPI record?

Cross-check NPI 1194334094 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1194334094 active?

Yes, as of the latest NPPES snapshot, NPI 1194334094 is active (record last updated 2025-04-17).

Other providers at this practice address

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Ehab Morcos Anesthesiology Physician · O Fallon, MO NPI 1588645345 Chakrapol Lattanand Anesthesiology Physician · O Fallon, MO NPI 1033198551 Gerard Malnar Obstetrics & Gynecology Physician · O Fallon, MO NPI 1447223367 John Long Anesthesiology Physician · O Fallon, MO NPI 1063442648 Ajay Chalasani Anesthesiology Physician · O Fallon, MO NPI 1487760385 Dale Klein Anesthesiology Physician · O Fallon, MO NPI 1801990437 Victor Bailey Emergency Medicine Physician · O Fallon, MO NPI 1760518336 Christine Lovellette Nurse Practitioner · O Fallon, MO NPI 1437336617

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-17.