Find a Top Internist Near Me in Houston, TX – Book an Appointment Instantly

George Mammen, MD, FACC, is a talented cardiologist at Memorial Katy Cardiology Associates in Houston and Katy, Texas. 

Dr. Mammen grew up in Kerala, India, and earned his medical degree at Trivandrum Medical College in Thiruvananthapuram, India. Moving to the United States to continue his education, Dr. Mammen completed a residency in internal medicine at South Baltimore General Hospital in Maryland and a cardiology fellowship at St. Luke’s Episcopal Hospital, Texas Heart Institute in Houston.

Dr. Mammen is board-certified in internal medicine and cardiology. His clinical interests include interventional cardiology and cardiovascular disease, with a particular focus on invasive procedures such as angioplasty, stent implantation, and pacemakers. He is trained in all aspects of adult cardiology, with an emphasis on coronary artery disease and heart failure. He joined Memorial Katy Cardiology Associates in 1982. 

Dr. Mammen is active in hospital and physician affairs and has served as Chief of Cardiology at Memorial Hermann Memorial City Hospital and Medical Director of the ICU at Memorial Hermann Katy Hospital. When not at the office, Dr. Mammen’s personal interests include tennis and skiing. He likes to spend his spare time with his wife and three children.

John Sunew, MD, FACC, FSCAI, is a skilled cardiologist at Memorial Katy Cardiology Associates in Houston, Katy, Cypress and Fulshear, Texas.

Dr. Sunew is triple-board-certified in Interventional Cardiology, Cardiovascular Disease, and Nuclear Cardiology. He is listed among Top Doctors 2015 in H Texas Magazine and Houstonia Magazine. He was born in Connecticut and grew up in New York state. 

Dr. Sunew attended Amherst College in Amherst, Massachusetts, and went on to earn his medical degree at the State University of New York Health Science Center in Brooklyn, New York. He then completed his internal medicine residency and cardiology fellowship at The George Washington University Medical Center in Washington, DC. He fulfilled his interventional cardiology fellowship at Northwestern University in Chicago, Illinois.

Before moving to Katy, Texas, Dr. Sunew practiced interventional cardiology for ten years in northern Virginia. He held many leadership roles with the Inova Health System, including Medical Director of the Cardiac Catheterization Laboratory at Inova Alexandria Hospital and Chairman of the Inova Cardiology Quality Steering Committee. He was also Regional Leader for Northern Virginia in the Virginia Heart Attack Coalition. In addition, Dr. Sunew served as Assistant Professor for the Department of Internal Medicine, Virginia Commonwealth University School of Medicine Inova Campus. He was also involved in several clinical research trials and academic publications. 

Dr. Sunew can offer the latest and most innovative treatments in cardiology, interventional cardiology, and peripheral vascular disease. He provides expertise in complex coronary angioplasty procedures, peripheral arterial angioplasty, and transradial cardiac catheterization. His non-invasive skills include transesophageal echocardiography and nuclear cardiology.

Yasser Al-Khadra, MD, FACC, is a highly trained cardiologist at Memorial Katy Cardiology Associates in Houston, Katy, and Cypress, Texas.

Dr. Al-Khadra is board certified in internal medicine, cardiology, nuclear cardiology and cardiac computed tomography. He completed his General Cardiology fellowship at Southern Illinois University School of Medicine in Springfield, Illinois. Then, went on for his Interventional Cardiology training at Wayne State University in Detroit, Michigan. During his fellowships, he was trained to perform high risk coronary procedures and chronic total occlusions.

Dr. Al-Khadra is well versed in multiple imaging modalities including PET scans, nuclear cardiology, cardiac computed tomography and echocardiography. He is skilled in complex coronary interventions, peripheral vascular interventions, patent foramen oval occlusion and management of pulmonary embolisms and deep vein thrombosis.

Dr. Al-Khadra has served as the director of study design and statistical analysis for the Cardiovascular Research Network research group and is well published with over 40 publications. His areas of interest in research include preventive cardiology, coronary artery disease, chronic total occlusions and transcatheter aortic valve replacement. His research has been presented in national and international conferences and collected many awards over the years.

Also, Dr. Al-Khadra is a professional musician who enjoys writing and arranging music on top of playing multiple instruments, the guitar being his main.

Mubarak Khawaja, MD, is a board-certified internal medicine physician with training in pulmonary medicine, and has over 30 years of experience in acute and chronic health care management. He currently practices at CareOne Internal Medicine and Primary Care, and aims to provide compassionate, high-quality care for all patients in and around Houston and Katy, Texas.

Dr. Khawaja received his medical degree from Liaquat University of Medical & Health Sciences in Sindh, Pakistan, in 1987. In 1994, he completed his residency in internal medicine at Mercy Catholic Medical Center in Philadelphia, Pennsylvania, through the Medical College of Pennsylvania, now known as Drexel University College of Medicine, where he also served as chief resident in 1995. General Hospital in Pittsburgh, Pennsylvania, also through Allegheny University of Health Sciences (now part of Drexel University College of Medicine) in 1997.

After his training, Dr. Khawaja served as a Clinical Assistant Professor for the Department of Family Medicine at the University of New Mexico for seven years. He then relocated to Katy, Texas, in 2006. Dr. Khawaja is affiliated with Memorial Hermann Katy Hospital and Methodist West Houston Hospital. He is a member of the Texas Medical Association, the Harris County Medical Society, and the American College of Physicians. To better serve more patients in his community, Dr. Khawaja is fluent in Spanish, Hindi, Urdu, and Gujarati.

Dr. Khawaja currently lives in Sugar Land, Texas, with his wife Sakina, and their two children. In his spare time, he enjoys philanthropy and traveling.

Asim Khawaja, MD, is a board-certified internal medicine physician practicing at CareOne Internal Medicine and Primary Care. Dr. Khawaja offers high-quality, patient-centered care to those in and around Houston and Katy, Texas.

Dr. Khawaja completed his medical degree at Ross University School of Medicine in Bridgetown, Barbados, in 2012. In 2015, he completed his residency program in internal medicine at Allegheny University Hospital in Pittsburg, Pennsylvania, through the Allegheny University of Health Sciences, now affiliated with Drexel University College of Medicine. After finishing his residency, he worked as a traveling physician for two years, and recently relocated back to the Houston area to join the team at CareOne. In addition to serving patients at CareOne, Dr. Khawaja is affiliated with Memorial Hermann Katy Hospital and Houston Methodist West Hospital.

When he’s not practicing medicine, Dr. Khawaja is a motorsports enthusiast, an avid skier, and enjoys spending time with his friends and family.

 About Elite IVF 

Elite IVF is an infertility and reproductive medicine practice with locations in The Woodlands, Odessa, Houston and Fulshear, Texas, Nashville, Tennessee, and Fairhope, Alabama. Led by infertility expert Botros Rizk, MD, MA, FACOG, FACS, HCLD, FRCOG, FRCS, the practice helps people achieve their dreams of becoming parents with advanced fertility treatments and concierge services. 

At Elite IVF, patients can experience unmatched attention and care. Dr. Rizk and his team provide individualized care, targeting patients’ specific problems with cutting-edge treatment techniques. They often use the DaVinci® robotic system to perform safe infertility treatments and procedures with minimal risks and high success rates. 

The Elite IVF team is dedicated to helping patients find correct diagnoses and successful treatments. They frequently treat patients for polycystic ovary syndrome, noncancerous growths like fibroids and polyps, recurrent pregnancy loss, and other forms of infertility. They often recommend in vitro fertilization, a highly successful alternative to traditional conception. 

The Elite IVF team also helps patients with egg and sperm donation and surrogacy. If patients can’t naturally get pregnant with their own gametes and those of their partners, the team helps them decide whether or not to use donor zygotes. 

If you or your partner are struggling to get pregnant, schedule a consultation at Elite IVF by phone or book online today.

Tomas G. Rios, MD, is a board-certified internal medicine specialist serving patients at Rios Healthcare Associates in Houston, Texas. He maintains the highest levels of accreditation and pursues continuing medical education to stay at the forefront of the latest trends in the medical field. 

Dr. Rios received his medical degree (MD) from Saint Louis University in Saint Louis, Missouri, in 2010 with a distinction in research. He completed residency training in internal medicine at the University of Texas Health Science Center Houston (UT Health) in Houston, Texas. He then completed an additional year of training in cardiovascular medicine at UT Health. 

During his time at UT Health, Dr. Rios gained invaluable experience with rotations at the University of Texas MD Anderson Cancer Center, the Texas Heart Institute/Baylor St Luke's  Medical Center, Memorial Hermann Health System, and Harris Health Lyndon B. Johnson Hospital in Houston, Texas.

In 2015, Dr. Rios started practicing as a hospitalist at Baylor St Luke's Medical Center. A quaternary care hospital, he gained additional experience in caring for the most critically ill patients requiring a multi-disciplinary approach to achieve the best outcomes.

In 2018, frustrated with the depersonalized nature of the current healthcare system, Dr. Rios sought to change the healthcare landscape. He imagined an industry where patients came first - above money and politics. Thus, he created Rios Healthcare Associates. Rios Healthcare Associates is where you can go for healthcare and know that your needs are the first priority.