Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allan F. Thornton, M.D.

Radiation Oncology Physician in Hampton, VA · enumerated 2005.

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

National Provider Identifier

1649256579

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Registry record

Entity type Individual (Type 1)

Name Dr. Allan F. Thornton

Credential M.D.

Sex Male

Practice address 40 Enterprise Pkwy, Hampton, VA, 23666

Phone (757) 251-6800

Fax (757) 251-6920

Enumeration date Dec 22, 2005

Last updated in NPPES Feb 17, 2015

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 01055682A (IN) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
200443990	Medicaid	IN	-

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

Where does Allan Thornton practice?

The practice location on file with NPPES is in Hampton, VA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Allan Thornton?

The National Provider Identifier (NPI) for Allan Thornton is 1649256579, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-17.