Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory Lewis Hornung, DMD
Dentist in Mason, OH · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1932113321
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory Lewis Hornung
Credential DMD
Sex Male
Practice address 4834 Socialville Foster Rd, Suite 40, Mason, OH, 45040
Phone (513) 228-7801
Fax (513) 228-7802
Enumeration date Jul 28, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees.
About the DMD 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.
Frequently asked questions
Where does Gregory Hornung practice?
The practice location on file with NPPES is in Mason, OH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gregory Hornung?
The National Provider Identifier (NPI) for Gregory Hornung is 1932113321, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → David Aichholz Obstetrics & Gynecology Physician · Mason, OH NPI 1881678787 Angeli Underiner Pediatrics Physician · Mason, OH NPI 1467422279 John Doscher Pediatrics Physician · Mason, OH NPI 1598735318 Paul Korn Pediatrics Physician · Mason, OH NPI 1811967466 Mitchell Internal Medicine, Inc. Internal Medicine Physician · Mason, OH NPI 1114957834 Gregory Davis General Practice Dentistry · Mason, OH NPI 1316960438 Landen Lake Pediatrics Primary Care Clinic/Center · Mason, OH NPI 1023029444 Keoni Nguyen Dermatology Physician · Mason, OH NPI 1831388198
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.