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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.

Malini Kumar, MD, is a family medicine physician and the director of Houston Testosterone Club and Wellness Center, an aesthetics and wellness center located in Houston, Texas.

Dr. Kumar received training at the LSU School of Medicine and has practiced medicine in the Greater Houston area for nearly 20 years.

Dr. Kumar has a unique interest in aesthetic medicine, but she's also deeply invested in the physical, emotional, and hormonal health of her patients.

After owning and operating her own med spa for three years, Dr. Kumar has now joined Houston Testosterone Club and Wellness Center to provide ultrasound skin tightening and hormone treatments to individuals living in and around Houston. 

Dr. Kumar believes that each patient should receive a personalized treatment plan to optimize their outward appearance and overall health. Dr. Kumar is a member of several professional organizations, including the Harris County Medical Society, the American Medical Association, the Texas Medical Association, and the American Academy of Family Practice. She is board certified by the National Board of Physicians and Surgeons.

To schedule an appointment with Dr. Kumar or learn more about the treatments available at Houston Testosterone Club and Wellness Center, call the office or book an appointment online today. 

Elina Shakya, MD, is a skilled, board-eligible endocrinologist at Endocrine and Psychiatry Center in Katy and Houston, Texas. 

Dr. Shakya earned her medical degree at the Nepal Medical College and Teaching Hospital in Gokarneshwor before relocating to the United States for her residency and fellowship. She studied at the prestigious Cleveland Clinic in Ohio for her residency. For her fellowship, Dr. Shakya worked under skilled physicians and medical professionals at Oshsner/Louisiana State University Health Shreveport. 

Certified by the American Board of Internal Medicine, Dr. Shakya has practiced as a primary care physician since 2011 and brings her expertise in endocrinology, diabetes care, and metabolism to the patients at Endocrine and Psychiatry Center. 

Dr. Shakya is proficient in English, Nepali, Hindu, and Urdu to better serve her patients. She maintains membership in the Endocrine Society, the American Association of Clinical Endocrinologists, and the American Board of Internal Medicine. 

Call the office nearest to you today to book an appointment with Dr. Shakya. 

Dr. Caroline Mbogua, the newest addition to the Katy Wellness Center Family. 

Dr. Caroline Mbogua is a board-certified internal medicine physician with 20+years of experience in diagnosing and treating a wide range of medical conditions.

Dr. Caroline Mbogua has dedicated her career to providing comprehensive care to patients.

Whether you’re bringing your child for their first check-up or scheduling a Pap smear, our compassionate team is here to support you every step of the way.

Dr. Dilawar Ajani is a dedicated and experienced internist based in Houston, Texas, committed to providing comprehensive, patient-centered care to adults at every stage of life. With a strong background in internal medicine, Dr. Ajani focuses on preventive care, early diagnosis, and effective management of both acute and chronic conditions. His clinical approach emphasizes listening closely to patients, understanding their unique health concerns, and developing personalized treatment plans that promote long-term wellness.

Dr. Ajani has extensive experience managing complex medical conditions such as diabetes, hypertension, and cardiovascular disease, while also prioritizing routine health maintenance and preventive screenings. Known for his compassionate bedside manner and attention to detail, he strives to build lasting relationships with his patients, empowering them to take an active role in their health.

Serving the greater Houston area, Dr. Ajani is dedicated to delivering high-quality, evidence-based care in a supportive and welcoming environment. His goal is to help patients achieve optimal health, improve their quality of life, and feel confident in their care every step of the way.

Raoul Perez, MD, is a primary care physician. He joined the elite team of providers at Calvary Medical Clinic in 2021, bringing his many years of knowledge and experience to the Livingston, Texas, office. 

Dr. Perez began his education and training in 1968. After earning his medical degree, he started practicing medicine in the upper northwestern United States and Canada. Upon relocating to Texas in the early 1980s, Dr. Perez obtained valuable experience as the emergency room physician at McAllen Methodist Hospital before opening a primary care practice and settling into his forever home in Livingston, Texas. He quickly became a pillar of the community, joining a three-physician team of providers while consecutively serving as the medical director for the Alabama-Coushatta Reservation.

In 2008, Dr. Perez joined Livingston Memorial Hospital as their clinical practicing primary care physician. As the hospital organization consolidated with Baylor and then with CHI St. Luke’s, Dr. Perez stayed on in his role as their clinic PCP, all the while continuing with his previous commitment at the Reservation.

Dr. Perez has been a member of the Texas Medical Association and has held his Texas Medical License since 1979. He holds his AHA BLS certification. He has been a San Jacinto County Medical Society member since 1979 and a staff physician at the hospital in Livingston, Texas, since 1982. Dr. Perez is fluent in three languages, Spanish, English, and French.

Call the office or reach out online to schedule an appointment with Dr. Perez.

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.

Nicolin Neal, MD, is a board-certified internal medicine practitioner and an integral part of the team at Rios Healthcare Associates. By providing highly personalized primary care services to residents of Houston, Texas, and the surrounding region, Dr. Neal enhances the health and wellness of those in her care.

Education has always shaped Dr. Neal’s life. She earned her medical degree from Saint Louis University School of Medicine in Missouri. Dr. Neal went on to refine her knowledge and skills through training in internal medicine at the University of Texas at Houston and a fellowship in geriatric medicine at Baylor College of Medicine in Waco, Texas.

In her professional life, Dr. Neal has focused extensively on geriatric care. She’s presented research at the American Delirium Society National Conferences and has authored a chapter in Ethical Considerations and Challenges in Geriatrics, a textbook used to train medical professionals. She has also worked to educate medical colleagues in geriatric care.

Patients love working with Dr. Neal because of her warm and welcoming nature. She takes the time to get to know those in her care, listening to their concerns and exploring the ways their social, emotional, and mental health interact with their overall health and wellness. 

Through her work at Rios Healthcare Associates, Dr. Neal has the opportunity to create lasting change for her patients. She finds her work deeply rewarding and loves meeting new patients and welcoming them into the practice family.

Ali El-Halwagi, MD, MPH, is double board certified in Internal Medicine and Rheumatology. He is dedicated to delivering compassionate, personalized care to every patient he serves. Dr. El-Halwagi graduated summa cum laude from Texas A&M University with a Bachelor of Science in Chemical Engineering. He then relocated to Houston to attend Baylor College of Medicine, where he earned his medical degree with honors. In addition, he holds a Master of Public Health from the University of Texas, reflecting his commitment to understanding and addressing the diverse needs of the community.

Dr. El-Halwagi completed his residency in Internal Medicine at Baylor College of Medicine, where he also served as chief resident. During this time, he gained valuable experience as a hospitalist at Ben Taub General Hospital and Baylor St. Luke’s Medical Center. He went on to complete his fellowship in Rheumatology at Baylor College of Medicine.

Throughout his training, Dr. El-Halwagi has been recognized with multiple honors for his humanistic approach to medicine, dedication to teaching, and excellence in patient care. He is a member of the Alpha Omega Alpha Honor Medical Society and the Gold Humanism Honor Society. He remains actively engaged with the American College of Rheumatology, participating in networking, conference planning, and ongoing professional development.

Dr. El-Halwagi is passionate about improving patient outcomes and building lasting relationships with his patients. Outside of medicine, he enjoys spending time with his family and traveling.