Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathleen T Siemsen, RPH
Pharmacist in Antioch, IL · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1982985487
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Registry record
Entity type Individual (Type 1)
Name Kathleen T Siemsen
Credential RPH
Sex Female
Practice address 1130 Main St, Antioch, IL, 60002
Phone (847) 395-0337
Fax (847) 395-2733
Enumeration date Aug 29, 2011
Last updated in NPPES Aug 29, 2011
Taxonomy & licenses
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy.
About the RPH 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.
Frequently asked questions
Is NPI 1982985487 active?
Yes, as of the latest NPPES snapshot, NPI 1982985487 is active (record last updated 2011-08-29).
How do I verify Kathleen Siemsen's NPI record?
Cross-check NPI 1982985487 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-29.