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Allergy/Immunology

Rene A. Leon, MD

Sees patients in Southlake, TX · Texas

Summary

Rene A. Leon, MD (Allergy/Immunology) is enrolled with Medicare at 1 practice location in Southlake, TX. NPI 1639255896. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(817) 421‑0770 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Rene A. Leon, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Allergy/ImmunologyPrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
37Years since medical school (graduated 1989)
MaleGender (as listed)
Texas Regional Asthma and Allergy CenterGroup practice

Quick answers

Where does Rene A. Leon see patients?
Medicare's clinician data lists 1 practice location in Southlake, TX. Call before your visit to confirm the address.
What is Rene A. Leon's specialty?
Medicare lists Allergy/Immunology as the primary specialty, and also Internal Medicine.
Does Rene A. Leon accept Medicare assignment?
Yes. Medicare's clinician data says Rene A. Leon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Rene A. Leon offer telehealth?
Medicare's clinician data says Rene A. Leon offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Rene A. Leon?
(817) 421-0770, as listed in official Medicare / NPI Registry data.
What is Rene A. Leon's NPI number?
1639255896. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Rene A. Leon is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Rene A. Leon as a member of this group (CMS data updated 2026-10-02).

  • Texas Regional Asthma and Allergy Center3 clinicians in the group

Specialties

Find other Allergy/Immunology doctors in Texas →

Other allergist and immunologists in Southlake

Clinicians with the same Medicare primary specialty in Southlake, TX — not a recommendation.

All allergist and immunologists in Southlake →

Clinician information

CredentialMD
Graduation year1989
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1639255896
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians