Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jack Derby, OD
Optometrist in Marion, IN · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841671948
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Registry record
Entity type Individual (Type 1)
Name Dr. Jack Derby
Credential OD
Sex Male
Practice address 506 S Washington St, Marion, IN, 46953
Phone (765) 662-6648
Fax (765) 662-6250
Enumeration date Jun 15, 2015
Last updated in NPPES Jun 15, 2015
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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
What is the NPI number for Jack Derby?
The National Provider Identifier (NPI) for Jack Derby is 1841671948, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jack Derby practice?
The practice location on file with NPPES is in Marion, IN. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-15.