Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory L Theis, D.D.S.
Dentist in Findlay, OH · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1578562773
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Gregory L Theis
Credential D.D.S.
Sex Male
Practice address 1816 Chapel Dr, Suite G, Findlay, OH, 45840
Phone (419) 422-8972
Fax (419) 422-8973
Enumeration date Jul 19, 2005
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees.
About the DDS 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
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 Theis?
Gregory Theis is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Bradley Gregory Oral and Maxillofacial Surgery (Dentist) · Findlay, OH NPI 1710911862 David Goodman General Practice Dentistry · Findlay, OH NPI 1104934991 Kyle Amspaugh Pediatric Dentistry · Findlay, OH NPI 1164639902 Infection Prevention & Treatment Center, LLC Infectious Disease Physician · Findlay, OH NPI 1699954313 Center for Oral & Maxillofacial Surgery Oral and Maxillofacial Surgery (Dentist) · Findlay, OH NPI 1033384268 Wassim El-Zubeidi Gastroenterology Physician · Findlay, OH NPI 1134521396
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.