James R. Amstadt, D.D.S.
General Practice Dentistry · Sun Prairie, WI
James R. Amstadt, D.D.S. is a general practice dentistry with a practice address in Sun Prairie, Wisconsin, and NPI 1982636353, issued on Jul 7, 2006. Check the license (Wisconsin 2433, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- James R. Amstadt
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 2433 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1260 W Main St, Sun Prairie, WI 53590
- Phone
- (608) 834-8603
- Enumerated
- Jul 7, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (608) 834-2981
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 2,305 in Wisconsin → Look up another NPI →
Also registered at 1260 W Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Lotowski, DMDDentist1548697659
Verify James R. Amstadt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2433Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $4,175.42
2 payments; by number, the most common kind was compensation for serving as faculty or as a speaker for a medical education program; the largest payer was Envista Holdings Corporation. The 41,669 providers of this specialty with any payment received $597.01 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
James R. Amstadt among 2,305 general practice dentistry records in Wisconsin
James R. Amstadt, D.D.S. is one of 2,305 general practice dentistry records with a practice address in Wisconsin. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 67% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 general practice dentistry records list a practice address in Sun Prairie
They are 16 of the 485 NPPES records with a practice address in Sun Prairie, and 2,305 general practice dentistry records in Wisconsin.
All 2,305 in Wisconsin → Every provider in Sun Prairie → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Robert Carpenter, DDSSun Prairie, WI 535901902901275
- Margaret Fisher, DDSSun Prairie, WI 535901558655704
- Andrew Goblirsch, DDSSun Prairie, WI 535901538882295
- Peter HillSun Prairie, WI 535901578582953
- Kasheena Hollis, DMDSun Prairie, WI 535901417260712
- Robert Limke, DDSSun Prairie, WI 535901730108184
- Raymond Maddox, DDSSun Prairie, WI 535901205139821
- Tanner McKenna, D.D.S.Sun Prairie, WI 535901033111513
Common questions
What is James R. Amstadt, D.D.S.'s NPI number?
James R. Amstadt, D.D.S.'s National Provider Identifier (NPI) is 1982636353, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James R. Amstadt, D.D.S. located?
The NPPES record lists a practice address at 1260 W Main St, Sun Prairie, WI, 53590. Phone: (608) 834-8603. Providers update this record themselves, so call before visiting.
How can I verify James R. Amstadt, D.D.S.'s license?
NPPES lists Wisconsin license number 2433, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity 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.