Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alisa S Williams, MD
Psychiatry Physician in Troy, VA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1295783165
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Registry record
Entity type Individual (Type 1)
Name Alisa S Williams
Credential MD
Sex Female
Practice address 144 Prison Lane, Mental Health, Troy, VA, 22974
Phone (434) 984-3700
Enumeration date May 4, 2006
Last updated in NPPES Jul 19, 2012
Taxonomy & licenses
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 0101239051 (VA) Primary
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
Where does Alisa Williams practice?
The practice location on file with NPPES is in Troy, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alisa Williams?
The National Provider Identifier (NPI) for Alisa Williams is 1295783165, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-19.