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GUILERMO A. REYES, MD
NPI 1952306649
Internal Medicine - Cardiovascular Disease in San Antonio, TX

Active since June 17, 2005CLIA 45D0998335 · Waiver
8093 ECKHERT RD, SAN ANTONIO, TX 78240(210) 949-1300(210) 949-1475 Get Directions Write a Review

NPPES record last updated: May 18, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Guilermo A. Reyes, Md NPPES

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

GUILERMO A. REYES, MD (NPI 1952306649) is a healthcare organization registered as a cardiovascular disease in San Antonio, Texas and active in the NPI registry since June 2005. The organization holds a CLIA Waiver certificate valid through April 11, 2028 and lists Roberto Alonso Reyes, Office Administrator, as its authorized official.

NPPES Registry Identity

NPI1952306649
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameCARDIOLOGY OF SAN ANTONIO PA
Location Address8093 ECKHERT RDSan Antonio, TX 78240-2637
Mailing Address8093 Eckhert RdSan Antonio, TX 78240-2637 · (210) 949-1300 · Fax (210) 949-1475
Phone(210) 949-1300
Fax(210) 949-1475
Organization SubpartNo
Authorized OfficialRoberto Alonso ReyesOffice Administrator · (210) 949-1300
Enumeration DateJune 17, 2005
Last NPPES UpdateMay 18, 2012
✔ NPI 1952306649 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in TX · J1563
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
8093 ECKHERT RD, San Antonio, TX 78240
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Other Names 1

Other NameGuilermo A. Reyes, Md

Other Identifiers 3

Medicare UPING51699TX
Medicaid080113601TX
Medicare PIN00190NTX

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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.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)

Guilermo A. Reyes, Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Guilermo A. Reyes, MD, which bills Medicare for the services this clinician delivers.

Clinician (1)

Guillermo Reyes, M.D.
Cardiovascular Disease (Cardiology)
NPI 1164544656
8093 ECKHERT RD
San Antonio, TX 78240
(210) 949-1300
✔ PECOS✔ Accepts Medicare0.1 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

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 45D0998335

Cardiology Of San Antonio PA · San Antonio, TX
Active · expires Apr 11, 2028
CLIA Number45D0998335
Laboratory TypePhysician Office
Certificate Effective DateApril 12, 2026
Certificate Expiration DateApril 11, 2028
Laboratory DirectorGuillermo A. Reyes
Laboratory Phone(210) 949-1300
Laboratory LocationCardiology Of San Antonio PA8093 Eckhert Road, San Antonio, TX 78240
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only 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 Cardiology Of San Antonio PA's NPI number?

The NPI number for Cardiology Of San Antonio PA is 1952306649. It was assigned to this organization in the NPPES registry on June 17, 2005. The provider is also known as Guilermo A. Reyes, MD.

Where is Cardiology Of San Antonio PA located?

Cardiology Of San Antonio PA is located at 8093 Eckhert Rd, San Antonio, TX 78240. The listed phone number is (210) 949-1300.

What is Cardiology Of San Antonio PA's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Cardiology Of San Antonio PA enrolled in Medicare?

Yes. Cardiology Of San Antonio PA is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Cardiology Of San Antonio PA?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Cardiovascular Disease (Cardiology)) reassigns their Medicare billing to Cardiology Of San Antonio PA. 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.

Does Cardiology Of San Antonio PA hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D0998335) is associated with this NPI, valid through April 11, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Cardiology Of San Antonio PA accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Cardiology Of San Antonio PA 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 Cardiology Of San Antonio PA was last updated on May 18, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.