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TEXAS REGIONAL ASTHMA & ALLERGY CENTER
NPI 1568545739
Allergy & Immunology - Allergy in Southlake, TX

Active since October 23, 2006CLIA Certified · 2 labs
900 E SOUTHLAKE BLVD, STE 300, SOUTHLAKE, TX 76092(817) 421-0770(817) 421-4759 Get Directions Write a Review

NPPES record last updated: January 9, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 2, 2023, Nov 3, 2022, Jul 21, 2022 and 4 more (7 updates tracked since 2021).

About Texas Regional Asthma & Allergy Center NPPES

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

TEXAS REGIONAL ASTHMA & ALLERGY CENTER (NPI 1568545739) is a healthcare organization registered as an allergy in Southlake, Texas and active in the NPI registry since October 2006. The organization holds 2 active CLIA laboratory certificates, maintains a secondary practice location in Fort Worth, and lists Rene Albert Leon, Md, as its authorized official.

NPPES Registry Identity

NPI1568545739
Entity TypeOrganization
Primary Taxonomy207KA0200X
Legal Business NameTEXAS REGIONAL ASTHMA & ALLERGY CENTER
Location Address900 E SOUTHLAKE BLVD, STE 300Southlake, TX 76092-6375
Mailing Address900 E Southlake Blvd, Ste 300Southlake, TX 76092-6375 · (817) 421-0770 · Fax (817) 421-4759
Phone(817) 421-0770
Fax(817) 421-4759
Organization SubpartNo
Authorized OfficialRene Albert LeonMd · (817) 421-0770
Enumeration DateOctober 23, 2006
Last NPPES UpdateJanuary 9, 20247 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2024
✔ NPI 1568545739 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & Immunology · AllergyAllopathic & Osteopathic Physicians
Taxonomy Code207KA0200X
Definition
A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee
900 E SOUTHLAKE BLVD, Southlake, TX 76092
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Secondary Practice Location 1

Location 13349 Golden Triangle BlvdFort Worth, TX 76177-7165 · Phone (817) 421-0770 · Fax (817) 562-5008

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Texas Regional Asthma & Allergy Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to Texas Regional Asthma & Allergy Center, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 3 within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

Rene Leon, M.D.
Allergy/Immunology
NPI 1639255896
900 E SOUTHLAKE BLVD STE 300
Southlake, TX 76092
(817) 421-0770
✔ PECOS✔ Accepts MedicareSame address
Alireza Shakouri, MD
Allergy/Immunology
NPI 1366652208
900 E SOUTHLAKE BLVD STE 300
Southlake, TX 76092
(817) 421-0770
✔ PECOS✔ Accepts MedicareSame address
Ernesto Ruiz Huidobro, MD
Allergy/Immunology
NPI 1790730273
900 E SOUTHLAKE BLVD STE 300
Southlake, TX 76092
(817) 421-0770
✔ PECOS✔ Accepts Medicare1.6 mi

Source: 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 2

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 for Provider-Performed Microscopy Procedures (PPMP) 45D0932615

Texas Regional Asthma & Allergy Center, LLP · Southlake, TX
Active · expires Aug 24, 2027
CLIA Number45D0932615
Laboratory TypePhysician Office
Certificate Effective DateAugust 25, 2025
Certificate Expiration DateAugust 24, 2027
Laboratory DirectorRene A. Leon
Laboratory Phone(817) 421-0770
Laboratory LocationTexas Regional Asthma & Allergy Center, LLP900 E Southlake Blvd Suite 300, Southlake, TX 76092
CLIA data matches this NPI record on: Address Name Phone
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 for Provider-Performed Microscopy Procedures (PPMP) 45D2173400

Texas Regional Asthma & Allergy Center · Fort Worth, TX
Active · expires Oct 10, 2027
CLIA Number45D2173400
Laboratory TypePhysician Office
Certificate Effective DateOctober 11, 2025
Certificate Expiration DateOctober 10, 2027
Laboratory DirectorRene Alberto Leon
Laboratory Phone(817) 421-0770
Laboratory LocationTexas Regional Asthma & Allergy Center3349 Golden Triange Blvd, Fort Worth, TX 76177
CLIA data matches this NPI record on: Name Phone
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.

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 Texas Regional Asthma & Allergy Center's NPI number?

The NPI number for Texas Regional Asthma & Allergy Center is 1568545739. It was assigned to this organization in the NPPES registry on October 23, 2006.

Where is Texas Regional Asthma & Allergy Center located?

Texas Regional Asthma & Allergy Center is located at 900 E Southlake Blvd Ste 300, Southlake, TX 76092. The listed phone number is (817) 421-0770.

What is Texas Regional Asthma & Allergy Center's specialty?

The primary specialty registered for this NPI is Allergy & Immunology, specializing in Allergy, with taxonomy code 207KA0200X.

Is Texas Regional Asthma & Allergy Center enrolled in Medicare?

Yes. Texas Regional Asthma & Allergy Center is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Texas Regional Asthma & Allergy Center?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Allergy/Immunology, reassign their Medicare billing to Texas Regional Asthma & Allergy Center. 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. Of these, 2 practice at this address and 3 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Texas Regional Asthma & Allergy Center hold CLIA laboratory certificates?

Yes. 2 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 Texas Regional Asthma & Allergy Center was last updated on January 9, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.