Mark D. Clayton Lcsw PC
NPI 1346511953 · Clinical Social Worker · St George, UT
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark D. Clayton Lcsw PC is a Clinical Social Worker organization in St George, UT (NPI 1346511953).
Provider details
- NPI number
- 1346511953
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mark Clayton, President(435) 673-4870
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
Mailing address
Registry dates
- Enumerated
- 2012-01-13
- Last updated
- 2017-03-20
Frequently asked questions
- What is Mark D. Clayton Lcsw PC's NPI number?
- Mark D. Clayton Lcsw PC's National Provider Identifier (NPI) is 1346511953, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark D. Clayton Lcsw PC?
- Mark D. Clayton Lcsw PC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark D. Clayton Lcsw PC located?
- Mark D. Clayton Lcsw PC's practice location on file with NPPES is 166 N 300 W, St George, UT 84770-2770.
- What is Mark D. Clayton Lcsw PC's phone number?
- The practice phone number listed in the NPPES registry for Mark D. Clayton Lcsw PC is (435) 673-4870.
- Does Mark D. Clayton Lcsw PC accept Medicare?
- Mark D. Clayton Lcsw PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark D. Clayton Lcsw PC?
- The authorized official listed on Mark D. Clayton Lcsw PC's NPPES record is Mark Clayton, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark D. Clayton Lcsw PC's NPI active?
- Yes — Mark D. Clayton Lcsw PC's NPI (1346511953) is active in the NPPES registry as of the last update on 2017-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.