Gregory A. Nyffeler, DDS
Dentist · East Troy, WI
Gregory A. Nyffeler, DDS is a dentist with a practice address in East Troy, Wisconsin, and NPI 1063554350, issued on Feb 13, 2007. Check the license (Wisconsin 3697, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Nyffeler
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 3697 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2481 Executive Dr, East Troy, WI 53120
- Phone
- (262) 642-5695
- Enumerated
- Feb 13, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (262) 642-5395
- Medicaid ID
- 33489700 WI
- Entity
- Type 1 · individual
8 nearest dentist records → All 1,750 in Wisconsin → Look up another NPI →
Also registered at 2481 Executive Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maxwell Behrend, DDSGeneral Practice Dentistry1578314084
- Tracy Davies, DDSDentist1386772986
Verify Gregory A. Nyffeler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3697Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average dentist in 2024
73 Medicare Part D claims for 42 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin39 claims
- Amoxicillin-Clavulanate Potass12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gregory A. Nyffeler among 1,750 dentist records in Wisconsin
Gregory A. Nyffeler, DDS is one of 1,750 dentist records with a practice address in Wisconsin. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 22% of them.
- NPI issued2007 · 22% of these records are older, 62% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 dentist records list a practice address in East Troy
They are 2 of the 62 NPPES records with a practice address in East Troy, and 1,750 dentist records in Wisconsin.
All 1,750 in Wisconsin → Every provider in East Troy → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Tracy Davies, DDSEast Troy, WI 531201386772986
- Ronald Hull, DDSElkhorn, WI 531211649386012
- Paul Kreul, DDSElkhorn, WI 531211609035328
- Maria RoqueElkhorn, WI 531211780363432
- Craig Thomas, DDSElkhorn, WI 531211609076884
- Jordan AnnisElm Grove, WI 531221548873292
- Richard LabinskiDousman, WI 531181861636508
- Susan Meinerz, D.D.S.Elm Grove, WI 531221013052364
Common questions
What is Gregory A. Nyffeler, DDS's NPI number?
Gregory A. Nyffeler, DDS's National Provider Identifier (NPI) is 1063554350, issued on Feb 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Nyffeler, DDS located?
The NPPES record lists a practice address at 2481 Executive Dr, East Troy, WI, 53120. Phone: (262) 642-5695. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Nyffeler, DDS's license?
NPPES lists Wisconsin license number 3697, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory A. Nyffeler, DDS prescribe under Medicare Part D?
In 2024, Gregory A. Nyffeler, DDS had 73 Medicare Part D claims for 42 beneficiaries; the average among dentist prescribers was 86. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.