NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark S Gesner, CRNA

Anesthesiology Physician in Low Moor, VA · enumerated 2006 · practices at Alleghany Anesthesia Associates.

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

National Provider Identifier

1982661401

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Registry record

Entity type Individual (Type 1)
Name Mark S Gesner
Credential CRNA
Sex Male
Practice address One Arch Lane, Low Moor, VA, 24457
Fax (540) 342-2193
Enumeration date Apr 27, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 0024116973 (VA) Primary
CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA credential

Other identifiers

Identifier Type State Issuer
431567 Other VA ANTHEM

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 Mark Gesner?
Mark Gesner is registered in NPPES with the primary taxonomy of Anesthesiology 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 2007-07-08.