IndividualActive
Mark Williamson, D.D.S.
NPI 1851341945 · General Practice Dentistry · Clio, MI
Mark Williamson, D.D.S. is a General Practice Dentistry provider in Clio, MI (NPI 1851341945).
Provider details
- NPI number
- 1851341945
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2901013535 (MI)
Specialties & taxonomies
Dental Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
4279 W Vienna Rd
Clio, MI 48420-9440
Phone: (810) 659-1721
Fax: (810) 659-0897
Street-level locationGet directions
Mailing address
Po Box 210
Flushing, MI 48433-0210
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2019-12-19
- Certified
- 2019-12-19
Frequently asked questions
- What is Mark Williamson's NPI number?
- Mark Williamson's National Provider Identifier (NPI) is 1851341945, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Williamson's specialty?
- Mark Williamson is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Mark Williamson located?
- Mark Williamson's practice location on file with NPPES is 4279 W Vienna Rd, Clio, MI 48420-9440.
- What is Mark Williamson's phone number?
- The practice phone number listed in the NPPES registry for Mark Williamson is (810) 659-1721.
- Is Mark Williamson's NPI active?
- Yes — Mark Williamson's NPI (1851341945) is active in the NPPES registry as of the last update on 2019-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.