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  Webster Location

  530  Orchard Street

  Webster, Texas 77598

  Phone  :  (281) 338-4004

      Fax  :  (281) 332-6524

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Dr. Mary Mercado is a native Houstonian. She graduated Magna Cum Laude from the University of Texas at San Antonio.

She obtained her M.D. with honors from Baylor College of Medicine and completed her Internal Medicine Residency where she was the Chief Medical Resident. Her three years of specialization training for Cardiovascular Disease was done in San Antonio at The University of Texas Health Science Center.

Dr. Mercado is Board Certified for Internal Medicine and Cardiovascular Disease. She also has specialty training in Nuclear Cardiology.

She has admitting privileges at Clear Lake Regional Medical Center, Methodist St John’s Hospital, and Bay Area Regional Medical Center.

In addition to practicing non-invasive cardiology, Dr. Mercado is experienced in invasive cardiology, implantable pacemakers, and implantable loop recorders. She became affiliated with Southeast Houston Cardiology in June 2008.

8:30  A.M.   till  5:00 P.M.


9:00 A.M.   till 12:00 P.M.


8:30 A.M.   till  5:00 P.M.


8:30  A.M.   till  5:00 P.M.


Mary Mercado, MD

Invasive Cardiology, Pacemaker implantation, Implantable Loop Recorders, Echocardiography, Transesophageal Echocardiography, and Stress Echocardiography.