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MARK D. CLAYTON LCSW PC
NPI 1346511953
Social Worker - Clinical in St George, UT

Active since January 13, 2012
166 N 300 W, STE 2, ST GEORGE, UT 84770(435) 673-4870 Get Directions Write a Review

NPPES record last updated: March 20, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mark D. Clayton Lcsw Pc NPPES

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

MARK D. CLAYTON LCSW PC (NPI 1346511953) is a healthcare organization registered as a clinical in St George, Utah and active in the NPI registry since January 2012. The organization lists Mark Clayton, President, as its authorized official.

NPPES Registry Identity

NPI1346511953
Entity TypeOrganization
Primary Taxonomy1041C0700X
Legal Business NameMARK D. CLAYTON LCSW PC
Location Address166 N 300 W, STE 2St George, UT 84770-2770
Mailing AddressPo Box 3219St George, UT 84771-3219 · (435) 673-4870
Phone(435) 673-4870
Organization SubpartNo
Authorized OfficialMark ClaytonPresident · (435) 673-4870
Enumeration DateJanuary 13, 2012
Last NPPES UpdateMarch 20, 2017
✔ NPI 1346511953 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
166 N 300 W, St George, UT 84770
Open in Google Maps ↗

Other Identifiers 1

Medicare OSCAR/certificationU000075576UT

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare, University of Utah Health Plans.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark D. Clayton Lcsw Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateUtahEnrollment IDO20120313000312Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark D. Clayton Lcsw PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Mark Clayton, LCSW
Clinical Social Worker
NPI 1376611384
166 N 300 W STE 2
Saint George, UT 84770
(435) 673-4870
✔ PECOS✔ Accepts Medicare0.6 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Mark D. Clayton Lcsw PC's NPI number?

The NPI number for Mark D. Clayton Lcsw PC is 1346511953. It was assigned to this organization in the NPPES registry on January 13, 2012.

Where is Mark D. Clayton Lcsw PC located?

Mark D. Clayton Lcsw PC is located at 166 N 300 W Ste 2, St George, UT 84770. The listed phone number is (435) 673-4870.

What is Mark D. Clayton Lcsw PC's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Mark D. Clayton Lcsw PC enrolled in Medicare?

Yes. Mark D. Clayton Lcsw PC is registered in the Medicare PECOS enrollment system.

When is Mark D. Clayton Lcsw PC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Utah, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Mark D. Clayton Lcsw PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Mark D. Clayton Lcsw PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Mark D. Clayton Lcsw PC accept?

Health plans from Molina Healthcare and University of Utah Health Plans list Mark D. Clayton Lcsw PC 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 Mark D. Clayton Lcsw PC was last updated on March 20, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.