NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John Duncan Sr., RPH

Pharmacist in San Antonio, TX · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1083638936

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. John Duncan Sr.
Credential RPH
Sex Male
Practice address 3110 Nogalitos, Suite 107, San Antonio, TX, 78225
Enumeration date Jul 26, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 20417 (TX) Primary
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Duncan?
The National Provider Identifier (NPI) for John Duncan is 1083638936, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Duncan practice?
The practice location on file with NPPES is in San Antonio, TX. 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 2007-07-08.