SOUTH TEXAS INTERNAL MEDICINE ASSOCIATES, P.A.
NPI 1366626533
Internal Medicine - Rheumatology in San Antonio, TX

Q: What is South Texas Internal Medicine Associates, P.A.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Active since December 24, 2007

1303 MCCULLOUGH AVE STE 300, SAN ANTONIO, TX 78212(210) 225-2551(210) 225-3896 Get Directions Write a Review

NPPES record last updated: August 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 24, 2026, Jun 2, 2025, Nov 15, 2024 and 1 more (4 updates tracked since 2021).

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About South Texas Internal Medicine Associates, P.a. NPPES

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

SOUTH TEXAS INTERNAL MEDICINE ASSOCIATES, P.A. (NPI 1366626533) is a healthcare organization registered as a rheumatology in San Antonio, Texas and active in the NPI registry since December 2007. The organization lists Brian E Winn, Owner, as its authorized official.

NPPES Registry Identity

NPI1366626533

Entity TypeOrganization

Primary Taxonomy207RR0500X

Legal Business NameSOUTH TEXAS INTERNAL MEDICINE ASSOCIATES, P.A.

Location Address1303 MCCULLOUGH AVE STE 300San Antonio, TX 78212-5605

Mailing Address1303 Mccullough Ave Ste 300San Antonio, TX 78212-5605 · (210) 225-2551 · Fax (210) 225-3896

Phone(210) 225-2551

Fax(210) 225-3896

Organization SubpartNo

Authorized OfficialBrian E WinnOwner · (210) 225-2551

Enumeration DateDecember 24, 2007

Last NPPES UpdateAugust 24, 20264 updates tracked since enumeration

NPPES CertifiedAugust 24, 2026

✔ NPI 1366626533 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code207RR0500X

Definition

An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

1303 MCCULLOUGH AVE STE 300, San Antonio, TX 78212

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Other Identifiers 7

Medicaid035668501TX

Other1629067251Individual Npi

Medicaid035668502TX

Other1134157522Individual Npi

Medicaid220118801TX

OtherP00871878TX · Rail Road Medicare

OtherP00871880TX · Rail Road Medicare

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

South Texas Internal Medicine Associates, P.a. 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 South Texas Internal Medicine Associates, P.A., which bills Medicare for the services this clinician delivers.

Clinician (1)

Brian Winn, M.D.

Internal Medicine

NPI 1629067251

1303 MCCULLOUGH AVE STE 300
San Antonio, TX 78212

(210) 225-2551

✔ PECOS✔ Accepts MedicareSame address

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 South Texas Internal Medicine Associates, P.A.'s NPI number?

The NPI number for South Texas Internal Medicine Associates, P.A. is 1366626533. It was assigned to this organization in the NPPES registry on December 24, 2007.

Where is South Texas Internal Medicine Associates, P.A. located?

South Texas Internal Medicine Associates, P.A. is located at 1303 Mccullough Ave Ste 300, San Antonio, TX 78212. The listed phone number is (210) 225-2551.

What is South Texas Internal Medicine Associates, P.A.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is South Texas Internal Medicine Associates, P.A. enrolled in Medicare?

Yes. South Texas Internal Medicine Associates, P.A. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through South Texas Internal Medicine Associates, P.A.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to South Texas Internal Medicine Associates, P.A.. 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 South Texas Internal Medicine Associates, P.A. was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.