Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory A Nyffeler, DDS
Dentist in East Troy, WI · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1063554350
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory A Nyffeler
Credential DDS
Sex Male
Practice address 2481 Executive Dr, East Troy, WI, 53120
Phone (262) 642-5695
Fax (262) 642-5395
Enumeration date Feb 13, 2007
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
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 33489700 | Medicaid | WI | - |
| 391449280018 | Other | - | BLUE CROSS |
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
What specialty is Gregory Nyffeler?
Gregory Nyffeler 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.
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.
Other providers at this practice address
Browse all → East Troy Family Dental Center Sc Dental Clinic/Center · East Troy, WI NPI 1376607408 Tracy Davies Dentist · East Troy, WI NPI 1386772986 Maxwell Behrend General Practice Dentistry · East Troy, WI NPI 1578314084 Behrend Family Dentistry and Associates, S.C. General Practice Dentistry · East Troy, WI NPI 1346071859
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.