Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Lehi Stack, M.D.

Nuclear Medicine Physician in Annandale, VA · enumerated 2006.

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

National Provider Identifier

1821011487

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Registry record

Entity type Individual (Type 1)

Name Aaron Lehi Stack

Credential M.D.

Sex Male

Practice address 3289 Woodburn Road, Suite 060, Annandale, VA, 22003

Phone (703) 698-0666

Fax (703) 573-6120

Enumeration date Jul 25, 2006

Last updated in NPPES Aug 5, 2024

Taxonomy & licenses

207U00000X Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License 0101236162 (VA) Primary

207U00000X Nuclear Medicine Physician Allopathic & Osteopathic Physicians · License D0060486 (MD) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD30367 (DC) Secondary

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

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 NPI 1821011487 active?

Yes, as of the latest NPPES snapshot, NPI 1821011487 is active (record last updated 2024-08-05).

How do I verify Aaron Stack's NPI record?

Cross-check NPI 1821011487 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-05.