Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas John Mancini, MD

Internal Medicine Physician in Ashburn, VA · enumerated 2005.

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

National Provider Identifier

1568456275

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Registry record

Entity type Individual (Type 1)

Name Thomas John Mancini

Credential MD

Sex Male

Practice address 21170 Ashby Ponds Blvd, Ashburn, VA, 20147

Phone (571) 291-6131

Enumeration date Sep 8, 2005

Last updated in NPPES Dec 7, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0101044028 (VA) 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
010131308	Medicaid	VA	-
P00199970	Other	VA	RR MEDICARE

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.

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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 Thomas Mancini?

Thomas Mancini is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-07.