Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jeffery Robert Byczek, PHARMD
Pharmacist in St Charles, IL · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1932702057
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Registry record
Entity type Individual (Type 1)
Name Dr. Jeffery Robert Byczek
Credential PHARMD
Sex Male
Practice address 1500 Lincoln Hwy, St Charles, IL, 60174
Phone (630) 517-4631
Fax (630) 883-4152
Enumeration date Nov 19, 2020
Last updated in NPPES Nov 19, 2020
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
Where does Jeffery Byczek practice?
The practice location on file with NPPES is in St Charles, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Jeffery Byczek?
The National Provider Identifier (NPI) for Jeffery Byczek is 1932702057, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-19.