Mark J. Williamson, D.D.S.
General Practice Dentistry · Clio, MI
Mark J. Williamson, D.D.S. is a general practice dentistry with a practice address in Clio, Michigan, and NPI 1851341945, issued on May 11, 2006. Check the license (Michigan 2901013535, as entered in NPPES) with the Michigan board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark J. Williamson
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 2901013535 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4279 W Vienna RD, Clio, MI 48420
- Phone
- (810) 659-1721
- Enumerated
- May 11, 2006
- Record last updated
- Dec 19, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (810) 659-0897
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 4,088 in Michigan → Look up another NPI →
Also registered at 4279 W Vienna RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chad Witkow, D.D.S.General Practice Dentistry1316099179
- Ronald Wright, D.D.S.General Practice Dentistry1326098278
Verify Mark J. Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 2901013535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark J. Williamson among 4,088 general practice dentistry records in Michigan
Mark J. Williamson, D.D.S. is one of 4,088 general practice dentistry records with a practice address in Michigan. 61% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 63% newer
- In a Medicare fileNo · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2019 · 74% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 general practice dentistry records list a practice address in Clio
They are 8 of the 186 NPPES records with a practice address in Clio, and 4,088 general practice dentistry records in Michigan. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 4,088 in Michigan → Every provider in Clio → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Kenneth Ackley, DDSClio, MI 484201891795639
- Timothy Miller, DDSClio, MI 484201609055151
- Paul Racine, D.D.SClio, MI 484201457351298
- Frank Radtke, D.D.S.Clio, MI 484201902924822
- Nermine Shehata, DMDClio, MI 484201760749592
- Chad Witkow, D.D.S.Clio, MI 484201316099179
- Ronald Wright, D.D.S.Clio, MI 484201326098278
- Stanley Lorang, DDSColumbiaville, MI 484211548459415
Common questions
What is Mark J. Williamson, D.D.S.'s NPI number?
Mark J. Williamson, D.D.S.'s National Provider Identifier (NPI) is 1851341945, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Williamson, D.D.S. located?
The NPPES record lists a practice address at 4279 W Vienna RD, Clio, MI, 48420. Phone: (810) 659-1721. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Williamson, D.D.S.'s license?
NPPES lists Michigan license number 2901013535, as entered by the provider. Search the Michigan 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.