Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Sitt Sak Vatthanatham, PHARMD
Pharmacist in Fort Smith, AR · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669075859
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Registry record
Entity type Individual (Type 1)
Name Dr. Sitt Sak Vatthanatham
Credential PHARMD
Sex Male
Practice address 2100 N 62nd St, Fort Smith, AR, 72904
Phone (479) 782-0606
Fax (479) 783-2206
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
Is NPI 1669075859 active?
Yes, as of the latest NPPES snapshot, NPI 1669075859 is active (record last updated 2020-11-19).
How do I verify Sitt Vatthanatham's NPI record?
Cross-check NPI 1669075859 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
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-19.