What is Mark Williams's NPI number?

Mark Williams's National Provider Identifier (NPI) is 1699847103, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Williams's specialty?

Mark Williams is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).

Where is Mark Williams located?

Mark Williams's practice location on file with NPPES is 315 North Elm, Centralia, IL 62801.

What is Mark Williams's phone number?

The practice phone number listed in the NPPES registry for Mark Williams is (618) 532-7600.

Is Mark Williams's NPI active?

Yes — Mark Williams's NPI (1699847103) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

Mark Williams, DC

NPI 1699847103 · Chiropractor · Centralia, IL

Mark Williams, DC is a Chiropractor provider in Centralia, IL (NPI 1699847103).

Provider details

NPI number: 1699847103
Entity type: Individual
Primary specialty: ChiropractorChiropractic Providers
Credential: DC
Sex: Male
Sole proprietor: No

Practice location

315 North Elm

Centralia, IL 62801

Phone: (618) 532-7600

Fax: (618) 532-8667

Street-level locationGet directions

More IL providers

Mailing address

Po Box 496

Centralia, IL 62801

Specialties & taxonomies

ChiropractorPrimary111N00000X
Chiropractic Providers

Profile Score

Detailed profile(84/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
83% 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.

Enumerated: 2006-11-14
Last updated: 2007-07-08

Frequently asked questions

What is Mark Williams's NPI number?: Mark Williams's National Provider Identifier (NPI) is 1699847103, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Williams's specialty?: Mark Williams is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
Where is Mark Williams located?: Mark Williams's practice location on file with NPPES is 315 North Elm, Centralia, IL 62801.
What is Mark Williams's phone number?: The practice phone number listed in the NPPES registry for Mark Williams is (618) 532-7600.
Is Mark Williams's NPI active?: Yes — Mark Williams's NPI (1699847103) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions