WILLIAMS MEDICAL CLINIC
NPI 1821143256
Clinic/Center - Rural Health in Holly Springs, MS
About Williams Medical Clinic NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAMS MEDICAL CLINIC (NPI 1821143256) is a healthcare organization registered as a rural health in Holly Springs, Mississippi and active in the NPI registry since January 2007. The organization holds a CLIA Waiver certificate valid through July 6, 2028 and lists Kenneth Williams, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Williams Medical Clinic is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
23Medicare enrollment records show 23 clinicians reassign Medicare billing to Williams Medical Clinic, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 5 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 9
Nearest to this location (20)
See all 23Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 25D0705689
Williams Medical Clinic · Holly Springs, MSFrequently 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 Alliance Healthcare System Inc's NPI number?
The NPI number for Alliance Healthcare System Inc is 1821143256. It was assigned to this organization in the NPPES registry on January 24, 2007. The provider is doing business as Williams Medical Clinic.
Where is Alliance Healthcare System Inc located?
Alliance Healthcare System Inc is located at 1938 Crescent Meadows Dr, Holly Springs, MS 38635. The listed phone number is (662) 252-1599.
What is Alliance Healthcare System Inc's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Rural Health, with taxonomy code 261QR1300X.
Is Alliance Healthcare System Inc enrolled in Medicare?
Yes. Alliance Healthcare System Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Alliance Healthcare System Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 23 clinicians in 9 Medicare specialties reassign their Medicare billing to Alliance Healthcare System Inc. 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. The largest specialties are Nurse Practitioner (6), Emergency Medicine (5) and Internal Medicine (3). Of these, 1 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Alliance Healthcare System Inc hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 25D0705689) is associated with this NPI, valid through July 6, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Alliance Healthcare System Inc accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 1 other insurer list Alliance Healthcare System Inc 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 Alliance Healthcare System Inc was last updated on February 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Williams Medical Clinic · NPI 1821143256
Rural Health organization in Holly Springs, Mississippi. Organization record, active in the CMS NPPES registry since January 24, 2007.
## Identity
- **NPI:** 1821143256 (Entity type: Organization)
- **Enumerated:** January 24, 2007
- **Primary specialty:** Clinic/Center - Rural Health · taxonomy 261QR1300X
- **Legal business name:** Alliance Healthcare System Inc
- **Organization subpart:** No
- **Authorized official:** Kenneth Williams, OWNER
## Practice location
- **Address:** 1938 CRESCENT MEADOWS DR, Holly Springs, MS 38635-7419
- **Phone:** (662) 252-1599 · **Fax:** (662) 252-1986
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 23 clinicians in 9 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (6), Emergency Medicine (5), Internal Medicine (3); 1 practice at this address and 5 within 10 miles; [full list](https://npiprofile.com/npi/1821143256/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 25, 2015
- **Other identifiers:** Medicare PIN C03243 (MS); Medicaid 09013693 (MS); Medicare PIN 258529 (MS); and 1 more
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1821143256) · Data from the CMS NPPES public registry.