Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Robert William Duncan, D.C.
Chiropractor in Bluffton, IN · enumerated 2006.
Data current as of Jul 11, 2026 · sourced from CMS NPPES
National Provider Identifier
1588671705
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Registry record
Entity type Individual (Type 1)
Name Dr. Robert William Duncan
Credential D.C.
Sex Male
Practice address 1085 N Main St Ste A, Bluffton, IN, 46714
Phone (260) 353-1400
Enumeration date Aug 1, 2006
Last updated in NPPES Apr 4, 2025
Taxonomy & licenses
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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 Robert Duncan practice?
The practice location on file with NPPES is in Bluffton, IN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Robert Duncan?
The National Provider Identifier (NPI) for Robert Duncan is 1588671705, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-04-04.