Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Kelsey Marie Ostrander, PHARMD

Pharmacist in Chesterfield, MO · enumerated 2020 · practices at Walgreen Co.

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

National Provider Identifier

1588275598

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Registry record

Entity type Individual (Type 1)

Name Dr. Kelsey Marie Ostrander

Credential PHARMD

Sex Female

Practice address 97 Long Rd, Chesterfield, MO, 63005

Phone (636) 519-7014

Fax (636) 519-7633

Enumeration date Aug 12, 2020

Last updated in NPPES Aug 12, 2020

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 2019043554 (MO) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD credential

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 Kelsey Ostrander's NPI record?

Cross-check NPI 1588275598 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1588275598 active?

Yes, as of the latest NPPES snapshot, NPI 1588275598 is active (record last updated 2020-08-12).

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Walgreen Co Pharmacy · Chesterfield, MO NPI 1275548216 Charles Montani Pharmacist · Chesterfield, MO NPI 1457635039 Stephanie Cook Pharmacist · Chesterfield, MO NPI 1982989422

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-12.