Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas Mark Johnson, M.D.

Retina Specialist (Ophthalmology) Physician in Fredericksburg, VA · enumerated 2006.

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

National Provider Identifier

1366498545

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Mark Johnson

Credential M.D.

Sex Male

Practice address 200 Executive Center Pkwy, Suite 102, Fredericksburg, VA, 22401

Phone (540) 654-5333

Fax (540) 654-5334

Enumeration date May 26, 2006

Last updated in NPPES Apr 9, 2019

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D0057684 (MD) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 0101231064 (VA) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD32823 (DC) Secondary

207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License MD32823 (DC) Secondary

207WX0107X Retina Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License D0057684 (MD) 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
027275400	Medicaid	DC	-
1366498545	Medicaid	VA	-
691200100	Medicaid	MD	-

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 Johnson?

Thomas Johnson is registered in NPPES with the primary taxonomy of Retina Specialist (Ophthalmology) 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 2019-04-09.