Photo of Dr. Ernest A. Haeusslein, MD, FACC, ABIM, Advanced Heart Failure & Transplant

A cardiologist in Round Rock, TX, Dr. Ernest Haeusslein is trained to care for your cardiovascular system & heart, treating conditions such as heart disease.


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Seton Heart Institute - Seton Williamson Medical Plaza  


Please Note: This link will direct you to a third-party website unaffiliated with (, where you're able to request or schedule an appointment online with Dr. Ernest Haeusslein.

Accepting New Patients?

Yes, Dr. Ernest A. Haeusslein is accepting new patients at this office.


(512) 324-4728


301 Seton Parkway, Suite 302, Round Rock, TX 78665

Office Details

Doctor Specialty Cardiology
Accepting New Patients? Yes
Practice Specialty Cardiology
Group Practice Seton Heart Institute
Health System Seton Healthcare Family
Languages Spoken English

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Insurance Accepted  

  • Aetna
  • Amerigroup
  • ARC Benefit Plan
  • ARIA
  • Averde Health
  • Beech Street
  • BlueCross
  • Care Improvement Plus
  • Care Improvement Plus - Medicare Advantage
  • Cigna
  • Cigna LocalPlus
  • Coventry Health Care
  • First Care
  • First Health
  • Galaxy Health Network
  • Health Payors Organization
  • HealthSmart Accel
  • HealthSmart Preferred Care
  • Hospice Austin
  • Humana
  • Humana - Medicare Advantage WELLMED Network
  • Humana HMOx
  • Humana- Medicare Advantage--Humana Network
  • IMO Med-Select Network
  • Integrated Medical Systems
  • MultiPlan
  • PHCS Health Plans
  • Sedwick/CMS Southwest Medical Provider Network
  • Sendero
  • Sendero IdealCare
  • Seton Health Plan
  • Superior Ambetter
  • Superior HealthPlan
  • Tricare
  • Triwest
  • United Healthcare
  • United Student Resources (UT Student Division)
  • USA Managed Care

About Dr. Haeusslein
Dr. Haeusslein



Dr. Ernest Haeusslein graduated from UCLA David Geffen School of Medicine before completing a residency in Cardiology at Johns Hopkins Hospital in Baltimore, MD. He then completed a fellowship in Cardiology at University of California San Francisco.

Dr. Haeusslein has one office in Texas where he specializes in Cardiology.

Dr. Haeusslein works with three doctors including Dr. Kristopher Heinzman and Dr. Christopher McCoy.


Education & Training  

Medical School


  • Johns Hopkins HospitalBaltimore, MD
    Residency in Cardiology


  • University of California San FranciscoSan Francisco, California
    Fellowship in Cardiology


Hospital Affiliations

  • Seton Family of Hospitals

Languages Spoken  

  • English
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