Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leonard Hart Armstrong, MD

Surgery Physician in Saint Paul, MN · enumerated 2008.

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

National Provider Identifier

1538314695

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Registry record

Entity type Individual (Type 1)

Name Dr. Leonard Hart Armstrong

Credential MD

Sex Male

Practice address 401 Phalen Blvd, Saint Paul, MN, 55130

Phone (651) 254-7980

Fax (651) 254-7969

Enumeration date Nov 17, 2008

Last updated in NPPES Jan 28, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 51319 (MN) Primary

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 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 Leonard Armstrong?

Leonard Armstrong is registered in NPPES with the primary taxonomy of Surgery 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 2025-01-28.