Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CORE HEALTH SYSTEMS
NPI 1851235204
Clinic/Center - Federally Qualified Health Center (FQHC) in Jefferson, TX

Q: What is Core Health Systems's NPI number?

The NPI number for Core Health Systems is 1851235204. It was assigned to this organization in the NPPES registry on April 16, 2026.

Q: What is Core Health Systems's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Federally Qualified Health Center (FQHC), with taxonomy code 261QF0400X.

Active since April 16, 2026

1113 NORTH WALCOTT STREET STE B, JEFFERSON, TX 75657(903) 758-2471(903) 234-1639 Get Directions Write a Review

NPPES record last updated: October 19, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 3, 2026, Jun 2, 2026, Apr 16, 2026 (3 updates tracked since 2026).

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About Core Health Systems NPPES

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

CORE HEALTH SYSTEMS (NPI 1851235204) is a healthcare organization registered as a federally qualified health center (fqhc) in Jefferson, Texas and active in the NPI registry since April 2026. The organization lists Rosemary O Villarreal, Provider Enrollment/cred Specialist, as its authorized official.

NPPES Registry Identity

NPI1851235204

Entity TypeOrganization

Primary Taxonomy261QF0400X

Legal Business NameCORE HEALTH SYSTEMS

Location Address1113 NORTH WALCOTT STREET STE BJefferson, TX 75657-1041

Mailing Address107 Woodbine PlLongview, TX 75601-2912 · (903) 758-2471 · Fax (903) 234-1639

Phone(903) 758-2471

Fax(903) 234-1639

Organization SubpartNo

Authorized OfficialRosemary O VillarrealProvider Enrollment/cred Specialist · (903) 932-3779

Enumeration DateApril 16, 2026

Last NPPES UpdateOctober 19, 20263 updates tracked since enumeration

NPPES CertifiedOctober 19, 2026

✔ NPI 1851235204 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyClinic/Center · Federally Qualified Health Center (FQHC)Ambulatory Health Care Facilities

Taxonomy Code261QF0400X

Also ListedGeneral PracticeTaxonomy 208D00000X

Also ListedPhysician AssistantTaxonomy 363A00000X

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X

1113 NORTH WALCOTT STREET STE B, Jefferson, TX 75657

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Core Health Systems is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to Core Health Systems, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians, nearest first (2)

Jeffrey Mcwilliams, MD

Emergency Medicine

NPI 1104037639

1300 N 6TH ST UNIT A
Longview, TX 75601

(903) 232-8928

✔ PECOS✔ Accepts Medicare28 mi

Keith Kirbow, APRN, FNP-C, PMHNP-C

Nurse Practitioner

NPI 1376189308

1300 N 6TH ST
Longview, TX 75601

(903) 921-1813

✔ PECOS✔ Accepts Medicare28 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 Core Health Systems's NPI number?

The NPI number for Core Health Systems is 1851235204. It was assigned to this organization in the NPPES registry on April 16, 2026.

Where is Core Health Systems located?

Core Health Systems is located at 1113 North Walcott Street Ste B, Jefferson, TX 75657. The listed phone number is (903) 758-2471.

What is Core Health Systems's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Federally Qualified Health Center (FQHC), with taxonomy code 261QF0400X.

Is Core Health Systems enrolled in Medicare?

Yes. Core Health Systems is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Core Health Systems?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Core Health Systems, in Emergency Medicine and Nurse Practitioner. 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.

When was this NPI record last updated?

The NPPES record for Core Health Systems was last updated on October 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.