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134 providers
Availability last updated 08/17/2026
Hammad Zaidi, MD, is an experienced family medicine physician at A&U Family Medicine in Sugar Land, Texas. He develops trust with patients and works hard to understand their unique situations and life events. He uses courteous, comprehensive, and respectful medical care when treating patients of all ages.
Dr. Zaidi completed his residency in family medicine at the Oklahoma University School of Medicine, Tulsa Campus. He is board-certified in family medicine and maintains his advanced credentials to stay up to date with the latest advances in medicine.
Patients with high blood pressure, high cholesterol, diabetes, congestive heart failure, asthma, allergies, obesity, and other chronic diseases can turn to Dr. Zaidi and his team for advanced, premium care.
He provides state-of-the-art diagnostic tests, joint injections, immunizations, hormone therapy, sick visits, and wellness exams. Patients feel comfortable with him, as Dr. Zaidi is approachable and personalizes treatment plans based on each patient’s unique needs. He offers travel medicine for patients who have difficulty getting to his office.
Dr. Zaidi is an Assistant Clinical Professor at Sam Houston State University College of Osteopathic Medicine and the University of Houston Tilman J. Fertitta Family School of Medicine. Additionally, he is affiliated with Houston Methodist Hospital, CHI St. Luke's Hospital, and Memorial Hermann Hospital.
In his free time, Dr. Zaidi enjoys spending time with his wife and two beautiful children. He feels privileged to serve the Sugar Land community and is available after hours for added patient convenience.
Dr. Zaidi is now a designated Civil Surgeon by USCIS. He currently accepts new patients and welcomes them to the practice.
Dr. Hammad Zaidi, MD
Family Physician
17034 University Blvd
#900
Sugar Land, TX 77479
Karoly Varga, MD
Surgeon
5615 Twin Rivers Ct
Sugar Land, TX 77479
Dayana Martinez Chao, APRN-CNP
Family Physician
3926 Ave H
Suite 15
Rosenberg, TX 77471
Walter Holmsten, MD
Family Physician
1730 B.F. Terry Blvd
Suite 302
Rosenberg, TX 77471
Jennifer Livingston, PA-C, is a skilled and compassionate physician assistant practicing at Calvary Medical Clinic, an internal medicine practice that has locations in Cleveland, Livingston, and Humble, Texas. She joined the practice’s elite team of providers in 2015. She has over 30 years of education, training, and medical experience.
After completing her initial studies at Illinois State University, she went on to receive her bachelor’s degree from Midwestern University and, ultimately, her master’s degree in family practice and emergency medicine. Ms. Livingston prestigiously graduated with distinctive honors for each degree that she earned.
Her initial medical career began in the underserved rural communities of Illinois and led her to become the overseeing physician assistant in the Rural Health Clinic of Carthage. She was instrumental in creating a pediatric program that gave small gifts to children upon admission to reassure and comfort them. That program is still in place today.
Later opportunities led her to Fort Hood, Texas, where she cared for military service members and their families as a primary care provider. She’s now settled in Livingston, Texas, where she continues providing medical care to local residents and families.
Ms. Livingston is NCCPA certified and a member of the American Academy of Physicians Assistants. She welcomes you to come by Calvary Medical Clinic for a visit.
To schedule an appointment with Ms. Livingston, or to make her your primary care provider, call Calvary Medical Clinic or request an appointment online today.
Jennifer Livingston, PA
Physician Assistant
309 Hwy 59 S Loop
Livingston, TX 77351
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.
Dr. Raoul Perez, MD
Family Physician
309 Hwy 59 S Loop
Livingston, TX 77351