Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory R. Semon, D.O.

Surgery Physician in Dayton, OH · enumerated 2009.

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

National Provider Identifier

1134366149

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory R. Semon

Credential D.O.

Sex Male

Practice address 30 E Apple St Ste 6258, Dayton, OH, 45409

Phone (937) 208-5055

Enumeration date Jan 13, 2009

Last updated in NPPES Aug 20, 2025

Taxonomy & licenses

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 34.011898 (OH) Secondary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License 34.011898 (OH) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 34.011898 (OH) 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.

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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 Gregory Semon?

Gregory Semon 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 2025-08-20.