Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas S Sullivan, M.D.

Family Medicine Physician in Reston, VA · enumerated 2006.

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

National Provider Identifier

1295742419

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Registry record

Entity type Individual (Type 1)

Name Thomas S Sullivan

Credential M.D.

Sex Male

Practice address 12018 Sunrise Valley Dr, Suite 400, Reston, VA, 20191

Phone (571) 262-5200

Fax (571) 521-7249

Enumeration date Aug 1, 2006

Last updated in NPPES Mar 21, 2011

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 0101043001 (VA) Primary

207QH0002X Hospice and Palliative Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 0101043001 (VA) Secondary

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
010051185	Medicaid	VA	-

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 Sullivan?

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

Other providers at this practice address

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Mary Buchan Nurse Practitioner · Reston, VA NPI 1932491073 Sandra Nichols Health Maintenance Organization · Reston, VA NPI 1780967232 Optum Palliative and Hospice Care Chronic Disease Hospital · Reston, VA NPI 1073984142 Emily Ollis Family Nurse Practitioner · Reston, VA NPI 1366807539 Compassus Op of Virginia LLC Community Based Hospice Care Agency · Reston, VA NPI 1043754708 Linda Duty Nurse Practitioner · Reston, VA NPI 1548767874 Lindsay Keene Nurse Practitioner · Reston, VA NPI 1174015614 Lois Penn Family Nurse Practitioner · Reston, VA NPI 1861955031

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-21.