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      • Providing great health care is our goal.
        • About WellMed
        • Your care team
        • Virtual video visits
        • Clinical program services
        • Specialists for Health
        • Transitional care
        • Services and specialties
        • Extended hours clinics

        • Become a WellMed patient

          Our goal is simple, to provide the best care so you can live your best life.

          Request an appointment
    • Patient resources
      • Take a look at what makes WellMed great.
        • Patient portal
        • Patient forms
        • Bill pay
        • Wellmed Charitable Foundation
        • Insurance plans accepted
        • Our network
        • Economic Security Assistance

        • Become a WellMed patient

          Our goal is simple, to provide the best care so you can live your best life.

          Request an appointment
    • Events & media

        • Events

          We bring events to help you connect with your community because your health matters.

          Find events near you

        • Media

          Age healthy now blog
        • Docs in a Pod
        • In the news
        • Our stories

          • Understanding gout

            Sept. 9, 2026

          • How to raise HDL cholesterol

            Sept. 8, 2026

          • What every man needs to know about prostate cancer

            Sept. 2, 2026

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South Texas Ancillary Services LTD Store Front

South Texas Ancillary Services LTD

720 Pleasanton Rd
San Antonio, TX  78214
Driving Directions

View our clinicians
Call 1-210-921-3800 to schedule

Languages spoken

English
Print Email
1-210-921-3800

Languages spoken

English
Print Email
Print Email
South Texas Ancillary Services LTD

South Texas Ancillary Services LTD
Call location1-210-921-3800
Get directions 720 Pleasanton Rd
San Antonio,  TX 78214
Fax number1-210-334-2861
Call location1-210-921-3800
Get directions 720 Pleasanton Rd
San Antonio,  TX 78214
Fax number1-210-334-2861

Office Hours

Sunday Closed
Monday 8:00 a.m. to 5:00 p.m.
Tuesday 8:00 a.m. to 5:00 p.m.
Wednesday 8:00 a.m. to 5:00 p.m.
Thursday 8:00 a.m. to 5:00 p.m.
Friday 8:00 a.m. to 5:00 p.m.
Saturday Closed

Our clinicians

Ana Miriam Ballester-Fiallo, MD practices Rheumatology in San Antonio
Ana Miriam Ballester-Fiallo, MD
Rheumatology
Call 1-210-921-3800 View profile
Eduardo Marques Zilli, MD practices Neurology in San Antonio
Eduardo Marques Zilli, MD
Neurology
Call 1-210-921-3800 View profile
Charles L. Stanley, PA practices Physician Assistant in San Antonio
Charles L. Stanley, PA
Physician assistant
Call 1-210-921-3800 View profile

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WellMed is committed to delivering high-quality, value-based care through coordinated, physician-led teams focused on prevention and patient-centered support.

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