Dr. Robert Zajac, MD


Infectious Disease Medicine | Male

Responsive Infectious Diseases 150 E Sonterra Blvd Ste 170 San Antonio, TX 78258 Get Directions
Dr. Robert Zajac, MD

Dr. Robert Zajac, MD is an infectious disease medicine doctor who practices in San Antonio, TX. He is 62 years old and has been practicing for 36 years. Dr. Zajac is affiliated with Baptist Medical Center.

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Dr. Zajac's Experience

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Visiting Dr. Zajac

Dr. Zajac accepts 12 insurance carriers

Dr. Zajac is now accepting new patients

Affiliated Hospitals

Hospital Quality
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Dr. Zajac's Reviews

Likelihood of recommending Dr. Zajac to family and friends
based on 41 total reviews (12 with comments)
Dr. Zajac's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    31 to 45 minutes
Patient Comments (12)
in San Antonio, TX |
Dr. Zajac was great, unfortunately his office staff is rude, condescending and I will never go back. They give out misinformation about lab work and when explained that they were wrong they blamed me and then hung up on me. This was not the first time the had me in tears.
in Garden Ridge, TX |
Dr. Zajac's nurses and office staff are friendly and accommodating. Dr. Zajac is thorough, listens to his patients, and answers your questions, which takes time. Dr. Zajac is not afraid to differ to another doctor with more expertise. Sometimes he runs late, but it is because he is thorough will all of his patients and deals with whatever complications/emergency situations that come up. You know he'd give you the extra time without hesitation if you needed it.
San antonio |
Office workers were rude, hateful, obnoxious, incompetent.
San Antonio, TX |
I have been seeing Dr. Zajac for monthly injections since early 2004 and Ann since she started with his office well over 10 years ago. They are both competent, friendly, professional, and genuinely care about my health. Ann is so kind and is able to work me in for an urgent visit when the need arises and never, ever once complains. I owe my health in good part to them and would highly recommend them to anybody else.
in San Antonio,TX |
Dr Zajac was called in by my husband and my daughter. I was taken to the ER and do not have Recall of my first days in the hospital. My condition was MRSA pneumonia. Dr Zajac was there every day. Dr Zajac created a treatment plan which saved my life.
in San Antonio, TX |
Our experience with Dr. Zajac was not very good!...Although he was a consult from Tricare Prime he seemed indifferent with us, and casually blurted out serious conditions without any sensitivity to the patient....We consisitently had to wait over an hour past our scheduled appt time! Their office staff at times had no clue of what the Dr's recommendations....Please beware as a Tricare patient we got the feeling that the Dr. just wanted us to return so Tricare could be billed....beware
Pleasanton, TX |
Waited over an hr pass my scheduled appointment to see the Dr.
San Antonio, TX |
Very nice gentlemen but he seems more like a Homeopathic DO than a MD. Just had no confidence in his treatment plan or lack thereof. Admittedly there was some complications but there was no Plan B. Last visit waited 1 1/2 hours.
in San Antonio, TX |
The Doctor was advised that a treatment decision was imperative, listened to the symptoms, was unable to respond, but promised to advise within 24 hours. A month later, in spite of written encouragement, which he chose to ignore, he never did comment, but instead insisted upon maintaining his prepaid fee, which was raised by 75% from the initial quotation, due to an error. In summary, a futile waste of time for which overbilled.
in New York, NY |
Very knowledgable, thorough explanation of condition and treatment. Strong leaning toward natural supplements to bolster medical treatment. Listens well, empathetic
in San Antonio, TX |
What a long wait! 2 hours! N I just needed a refill on my medication ....he spends 5 mins n the office w u!
in San Antonio, TX |
They rarely answer the phone and don't respond to questions. Seems to have less time for patients and doesn't develop rapport.
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Dr. Zajac's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Infectious Disease Medicine
  •  Board certified in Infectious Disease and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
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  • Media & Publications

    Dr. Zajac has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for Texas.

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  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Zajac's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Infectious Disease
  • Internal Medicine

Conditions Treated

Dr. Zajac does not have any conditions listed. If you are Dr. Zajac and would like to add conditions you treat, please update your free profile.


  • Medical School
    La State Univ Sch Of Med In New Orleans

    Graduated in 1981

  • Residency Hospital
    Wilford Hall Med Center Aetc

Languages Spoken

  • English

Memberships &
Professional Affiliations

Dr. Zajac does not have any memberships or affiliations listed. If you are Dr. Zajac and would like to add memberships or affiliations, please update your free profile.


  • Infectious Disease Medicine
  • Internal Medicine

Procedures Performed

Dr. Zajac does not have any procedures listed. If you are Dr. Zajac and would like to add procedures you perform, please update your free profile.