Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Reginald Kai Mason, MD
Surgery Physician in Alton, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699739607
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Registry record
Entity type Individual (Type 1)
Name Dr. Reginald Kai Mason
Credential MD
Sex Male
Practice address 2 Saint Anthonys Way Ste 105, Alton, IL, 62002
Phone (618) 465-2761
Fax (618) 465-4750
Enumeration date Apr 14, 2006
Last updated in NPPES Oct 20, 2025
Taxonomy & licenses
208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 0101236379 (VA) Secondary
208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 2021-03370 (NC) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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 1699739607 active?
Yes, as of the latest NPPES snapshot, NPI 1699739607 is active (record last updated 2025-10-20).
How do I verify Reginald Mason's NPI record?
Cross-check NPI 1699739607 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
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-20.