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SHANNON CLINIC
NPI 1003762899
Clinic/Center - Rural Health in Big Spring, TX

Active since March 05, 2026CLIA Certified · 8 labs
2503 S GREGG ST STE C, BIG SPRING, TX 79720(432) 606-5178(432) 606-5066 Get Directions Write a Review

NPPES record last updated: March 6, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Shannon Clinic NPPES

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

SHANNON CLINIC (NPI 1003762899) is a healthcare organization registered as a rural health in Big Spring, Texas and active in the NPI registry since March 2026. The organization holds 8 active CLIA laboratory certificates and lists Ricardo Villarreal, Cao, as its authorized official.

NPPES Registry Identity

NPI1003762899
Entity TypeOrganization
Primary Taxonomy261QR1300X
Legal Business NameSHANNON CLINIC
Location Address2503 S GREGG ST STE CBig Spring, TX 79720-6583
Mailing AddressPo Box 22000San Angelo, TX 76902-7200 · (325) 747-1511
Phone(432) 606-5178
Fax(432) 606-5066
Organization SubpartYes
Authorized OfficialRicardo VillarrealCao · (325) 481-2200
Enumeration DateMarch 5, 2026
Last NPPES UpdateMarch 6, 2026
NPPES CertifiedMarch 6, 2026
✔ NPI 1003762899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Rural HealthAmbulatory Health Care Facilities
Taxonomy Code261QR1300X
2503 S GREGG ST STE C, Big Spring, TX 79720
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CLIA Laboratory Certificates CMS CLIA 8

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 45D2330971

Shannon Clinic Big Spring · Big Spring, TX
Active · expires Sep 23, 2027
CLIA Number45D2330971
Laboratory TypePhysician Office
Certificate Effective DateSeptember 24, 2025
Certificate Expiration DateSeptember 23, 2027
Laboratory DirectorMarcie Lusk
Laboratory Phone(432) 606-5178
Laboratory LocationShannon Clinic Big Spring2503 Gregg St Unit C, Big Spring, TX 79720
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 45D2111741

Shannon Clinic · Big Spring, TX
Active · expires Apr 12, 2028
CLIA Number45D2111741
Laboratory TypePhysician Office
Certificate Effective DateApril 13, 2026
Certificate Expiration DateApril 12, 2028
Laboratory DirectorScott Barclay
Laboratory Phone(432) 714-4650
Laboratory LocationShannon Clinic910 S Main St, Big Spring, TX 79720
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory to perform only waived tests.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 45D2336643

Shannon Clinic Big Spring Mob · Big Spring, TX
Active · expires Jan 6, 2028
CLIA Number45D2336643
Laboratory TypePhysician Office
Certificate Effective DateJanuary 7, 2026
Certificate Expiration DateJanuary 6, 2028
Laboratory DirectorMarcie Lusk
Laboratory Phone(432) 714-4600
Laboratory LocationShannon Clinic Big Spring Mob1501 W 11th Pl, Big Spring, TX 79720
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Certificate of Waiver 45D1018927

Shannon Clinic · Big Spring, TX
Active · expires Nov 4, 2027
CLIA Number45D1018927
Laboratory TypePhysician Office
Certificate Effective DateNovember 5, 2025
Certificate Expiration DateNovember 4, 2027
Laboratory DirectorScott Barclay
Laboratory Phone(432) 264-7180
Laboratory LocationShannon Clinic1501 W 11th Pl Ste 200, Big Spring, TX 79720
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 45D2240988

Shannon Clinic · Big Spring, TX
Active · expires Oct 24, 2027
CLIA Number45D2240988
Laboratory TypePhysician Office
Certificate Effective DateOctober 25, 2025
Certificate Expiration DateOctober 24, 2027
Laboratory DirectorScott Barclay
Laboratory Phone(432) 268-5310
Laboratory LocationShannon Clinic1501 W 11th Pl Ste 305, Big Spring, TX 79720
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 45D2092147

Shannon Clinic · Big Spring, TX
Active · expires Feb 25, 2027
CLIA Number45D2092147
Laboratory TypePhysician Office
Certificate Effective DateFebruary 26, 2025
Certificate Expiration DateFebruary 25, 2027
Laboratory DirectorScott Barclay
Laboratory Phone(432) 264-6361
Laboratory LocationShannon Clinic1501 W 11th Pl Ste 206, Big Spring, TX 79720
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARCIE DIANNE LUSK DNP, APRN, FNP-C
Nurse Practitioner (Family)
2503 S GREGG ST STE C
BIG SPRING, TX 79720
Howard County (432) 606-5178

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 Shannon Clinic's NPI number?

The NPI number for Shannon Clinic is 1003762899. It was assigned to this organization in the NPPES registry on March 5, 2026.

Where is Shannon Clinic located?

Shannon Clinic is located at 2503 S Gregg St Ste C, Big Spring, TX 79720. The listed phone number is (432) 606-5178.

What is Shannon Clinic's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Rural Health, with taxonomy code 261QR1300X.

Does Shannon Clinic hold CLIA laboratory certificates?

Yes. 8 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Shannon Clinic was last updated on March 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.