NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Allison Renee Washenko

Pharmacist in O Fallon, IL · enumerated 2020 · practices at Walmart Inc..

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

National Provider Identifier

1821698432

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Registry record

Entity type Individual (Type 1)
Name Allison Renee Washenko
Sex Female
Practice address O Fallon, IL, 62269
Phone (618) 632-9381
Enumeration date Nov 1, 2020
Last updated in NPPES Jun 9, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 2020024553 (MO) Secondary
183500000X Pharmacist Pharmacy Service Providers · License 051.303197 (IL) Primary

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

What is the NPI number for Allison Washenko?
The National Provider Identifier (NPI) for Allison Washenko is 1821698432, a Type 1 (individual) record in the CMS NPPES registry.
Where does Allison Washenko practice?
The practice location on file with NPPES is in O Fallon, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-09.