Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Daniel Stephan Lyon, DO

Hospitalist Physician in Duluth, MN · enumerated 2020.

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

National Provider Identifier

1821614272

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Registry record

Entity type Individual (Type 1)

Name Dr. Daniel Stephan Lyon

Credential DO

Sex Male

Practice address 400 E 3rd St, Duluth, MN, 55805

Phone (218) 786-8364

Enumeration date Jun 22, 2020

Last updated in NPPES Aug 30, 2024

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 76709 (MN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Daniel Lyon?

Daniel Lyon is registered in NPPES with the primary taxonomy of Hospitalist 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 2024-08-30.