Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John G. Williams, M.D.
Specialist in Charlottesville, VA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437127107
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Registry record
Entity type Individual (Type 1)
Name Dr. John G. Williams
Credential M.D.
Sex Male
Practice address 195 Riverbend Drive, Suite 2, Charlottesville, VA, 22911
Phone (434) 293-5008
Fax (434) 293-2004
Enumeration date Mar 9, 2006
Last updated in NPPES Feb 3, 2010
Taxonomy & licenses
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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is John Williams?
John Williams is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-03.