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HealthTexas Primary Care Doctors
(Wurzbach Clinic)

Health Texas Building

About Us

In 2009, HealthTexas launched the Wurzbach Clinic in the South Texas Medical Center. This clinic is situated on the historic Wurzbach estate, previously owned by rancher William Wurzbach, whose brother, Congressman Harry Wurzbach, has a street named after him. On this campus, remnants of the old estate can still be found. Covering 8,217 square feet, the Wurzbach Clinic features 20 examination rooms and accommodates 8 healthcare providers. Additionally, this clinic serves as the clinical base for our President & CEO, Dr. Kristi Clark.

Our Primary Care Services

Our Primary Care services deliver Quality and Compassionate Care with Outstanding Service, Every Patient, Every Time. From routine check-ups to addressing complex health issues, primary care doctors prioritize excellence in medical care while fostering trust and empathy in every interaction.

24/7 Physician on Call

Patient Education

Patient Navigators

Same-Day Sick Appointments

Annual Wellness Exams


Wurzbach Primary Care Doctors

Ana Maria Calderon, MD at HealthTexas

Ana Maria Calderon

Internal Medicine
Kristi Clark, MD at HealthTexas

Kristi Clark

Internal Medicine
Timothy Kosmatka, MD at HealthTexas

Timothy Kosmatka

Family Medicine
Mae Sepulveda, MD at HealthTexas

Mae Sepulveda

Family Medicine
James Walter, MD

James Walter

Family Medicine
Stephanie Garza FNP-C at HealthTexas

Stephanie Garza

Advanced Practice Clinician
Trinity Williams, PA-C at HealthTexas

Trinity Williams

Advanced Practice Clinician

Frequently Asked Questions

Got questions? We’ve got answers! Check out our frequently asked questions or feel free to reach out to us. We’re here to help.

HealthTexas Primary Care Doctors has 18 clinics in the San Antonio Region. Our network of neighborhood clinics are conveniently located to serve you better.
You can easily find a clinic by using our “Find a Location” tab on our website. Simply hover over the locations drop down menu, select your city, and explore our locations near you.
Your appointment time is the actual time to see your provider. We ask you to arrive early to check-in, complete needed paperwork, triage your vitals, and review your medications and medical history. New patients – please arrive 30 minutes prior to your scheduled appointment time. Existing patients – please arrive 15 minutes prior to your scheduled appointment time.

Please call our Marketing Team at (210) 731-4864 or email us at

Yes, we have bilingual doctors and staff members available at all of our clinics. If you prefer to communicate in a specific language, please let us know, and we will do our best to accommodate your needs.

Only existing patients can schedule an appointment online through our Patient Portal. Simply click the “Patient Portal” tab on the top of the page.

Yes, HealthTexas accepts a wide range of insurance plans including Medicare and Medicare Advantage. We do not however accept Medicaid only or The Marketing Exchange (Obamacare). To verify if your insurance is accepted, please contact any clinic.

Clinic hours may vary by location. You can find the specific operating hours for each clinic on our location page or by contacting the clinic directly.

We value your feedback! You can share your experience during one of your visits at a clinic. Please ask to fill out a Google review in person or simply visit our clinic on Google and leave us a review! If you have any concerns please email and we will get back to you as soon as possible. Your input helps us improve our services for all our patients!