Timothy G. Williamson, DDS
General Practice Dentistry · Oconomowoc, WI
Timothy G. Williamson, DDS is a general practice dentistry with a practice address in Oconomowoc, Wisconsin, and NPI 1124076658, issued on May 5, 2006. Check the license (Wisconsin 4704, as entered in NPPES) with the Wisconsin board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Timothy G. Williamson
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 4704 WI
Self-reported in NPPES; status is on the state search - Practice location
- 970 S Silver Lake St, Oconomowoc, WI 53066
- Phone
- (262) 567-7400
- Enumerated
- May 5, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 2,305 in Wisconsin → Look up another NPI →
Also registered at 970 S Silver Lake St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy G. Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 4704Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Timothy G. Williamson among 2,305 general practice dentistry records in Wisconsin
Timothy G. Williamson, DDS 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 not. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 67% newer
- In a Medicare fileNo · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2026 · 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).
12 general practice dentistry records list a practice address in Oconomowoc
They are 12 of the 506 NPPES records with a practice address in Oconomowoc, and 2,305 general practice dentistry records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,305 in Wisconsin → Every provider in Oconomowoc → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Christina Copoulos-SwansonOconomowoc, WI 530661972293298
- Jose Gonzalez, DDSOconomowoc, WI 530661508430091
- Kelly Groskopf, D.D.S.Oconomowoc, WI 530661962850701
- Mary Frances Jahnke, DDSOconomowoc, WI 530661902244163
- Katherine Knabe, DDSOconomowoc, WI 530661306426044
- William Longe, D.D.S.Oconomowoc, WI 530661013136381
- Kevin Nitz, DDSOconomowoc, WI 530661790534808
- Adam Quetsch, DDSOconomowoc, WI 530661891300455
Common questions
What is Timothy G. Williamson, DDS's NPI number?
Timothy G. Williamson, DDS's National Provider Identifier (NPI) is 1124076658, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy G. Williamson, DDS located?
The NPPES record lists a practice address at 970 S Silver Lake St, Oconomowoc, WI, 53066. Phone: (262) 567-7400. Providers update this record themselves, so call before visiting.
How can I verify Timothy G. Williamson, DDS's license?
NPPES lists Wisconsin license number 4704, 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. 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.