Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jeffrey G Hamper, PHARMD
Pharmacist in Darien, IL · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841570769
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Registry record
Entity type Individual (Type 1)
Name Dr. Jeffrey G Hamper
Credential PHARMD
Sex Male
Practice address 7329 S Cass Ave, Darien, IL, 60561
Phone (630) 852-0070
Fax (630) 852-8320
Enumeration date Aug 23, 2011
Last updated in NPPES Aug 23, 2011
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 1841570769 active?
Yes, as of the latest NPPES snapshot, NPI 1841570769 is active (record last updated 2011-08-23).
How do I verify Jeffrey Hamper's NPI record?
Cross-check NPI 1841570769 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 2011-08-23.