Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher Robert Armstrong, MD, MPH, FACPM

Aerospace Medicine Physician in Bethesda, MD · enumerated 2006.

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

National Provider Identifier

1982678512

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Robert Armstrong

Credential MD, MPH, FACPM

Sex Male

Practice address National Naval Medical Center, 8901 Wisconsin Ave, Bethesda, MD, 20889

Phone (301) 295-9562

Fax (301) 295-6773

Enumeration date Feb 13, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

2083A0100X Aerospace Medicine Physician Allopathic & Osteopathic Physicians · License MD035306 (DC) Secondary

2083A0100X Aerospace Medicine Physician Allopathic & Osteopathic Physicians · License 0101039817 (VA) Primary

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License MD035306 (DC) Secondary

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License 0101039817 (VA) 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

What specialty is Christopher Armstrong?

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

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.