Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Holly Lynn Ahnen, PHARMD
Pharmacist in Duluth, MN · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598128241
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Registry record
Entity type Individual (Type 1)
Name Holly Lynn Ahnen
Credential PHARMD
Sex Female
Practice address 215 N Central Ave, Duluth, MN, 55807
Phone (218) 624-9305
Fax (218) 624-0447
Enumeration date Mar 31, 2016
Last updated in NPPES Mar 31, 2016
Taxonomy & licenses
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.
Frequently asked questions
Is NPI 1598128241 active?
Yes, as of the latest NPPES snapshot, NPI 1598128241 is active (record last updated 2016-03-31).
How do I verify Holly Ahnen's NPI record?
Cross-check NPI 1598128241 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-31.