Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. TIMOTHY G. WILLIAMSON DDS
NPI 1124076658
Dentist - General Practice in Oconomowoc, WI

Q: What is Timothy Williamson's NPI number?

The NPI number for Timothy Williamson is 1124076658. It was assigned to this individual provider in the NPPES registry on May 5, 2006.

Q: What is Timothy Williamson's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Active since May 05, 2006

970 S SILVER LAKE ST, OCONOMOWOC, WI 53066(262) 567-7400 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Timothy G. Williamson Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TIMOTHY G. WILLIAMSON DDS (NPI 1124076658) is an individual general practice provider in Oconomowoc, Wisconsin, licensed in Wisconsin (4704) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1124076658

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. TIMOTHY G. WILLIAMSONCredential: DDS

Location Address970 S SILVER LAKE STOconomowoc, WI 53066-3802

Mailing Address36233 Silver Maple LnOconomowoc, WI 53066-9457 · (262) 560-9899

Phone(262) 567-7400

Sole ProprietorNo

Enumeration DateMay 5, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1124076658 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in WI · 4704

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

970 S SILVER LAKE ST, Oconomowoc, WI 53066

Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BONITA JEAN DEBBAN PH.D

Psychologist

970 S SILVER LAKE ST
OCONOMOWOC, WI 53066

Waukesha County (262) 567-7900

DR. CHRISTIAN ZEBRASKY D.C.

Chiropractor

970 S SILVER LAKE ST, SUITE 106
OCONOMOWOC, WI 53066

Waukesha County (262) 560-9400

A NEW DAY PSYCHOLOGICAL SERVICES LLC

Psychologist (Clinical)

970 S SILVER LAKE ST, SUITE 103
OCONOMOWOC, WI 53066

Waukesha County (262) 567-7900

MRS. DEBORAH J KLECKER LPC, MFT-IT, SAC-IT

Counselor (Professional)

970 S SILVER LAKE ST, SUITE #103
OCONOMOWOC, WI 53066

Waukesha County (262) 567-7377

DR. GREGORY MICHAEL MOYER M.D.

Pediatrics

970 S SILVER LAKE ST, STE. 102
OCONOMOWOC, WI 53066

Waukesha County (262) 569-7100

LAKE COUNTRY PAIN TREATMENT

Specialist

970 S SILVER LAKE ST, SUITE 106
OCONOMOWOC, WI 53066

Waukesha County (262) 560-9400

LAKE COUNTRY PEDIATRICS SC

Pediatrics

970 S SILVER LAKE ST, STE. 102
OCONOMOWOC, WI 53066

Waukesha County (262) 569-7100

COMPLETE CHIROPRACTIC AND REHAB CENTER LLC

Chiropractor

970 S SILVER LAKE ST, #106
OCONOMOWOC, WI 53066

Waukesha County (262) 560-9400

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Timothy Williamson's NPI number?

The NPI number for Timothy Williamson is 1124076658. It was assigned to this individual provider in the NPPES registry on May 5, 2006.

Where is Timothy Williamson located?

Timothy Williamson practices at 970 S Silver Lake St, Oconomowoc, WI 53066. The listed phone number is (262) 567-7400.

What is Timothy Williamson's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

What insurance does Timothy Williamson accept?

Health plans from BEST Life, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Dominion National and 5 other insurers list Timothy Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Timothy Williamson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.