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Dr. Kimble joined UTMB Health Community Based Clinics in 2015. She is board-certified by the American Board of Pediatrics after completing her residency at UT Houston Health Science Center. She has a bachelor's degree from Hampton University.  She was in private practice shortly after residency and co-owned the practice for 10 years. She is a married professional with 4 children; 2 sets of twins identical boys and fraternal girls. Eventually she and her family made a change and moved to San Antonio where she worked as a general pediatrician, urgent care physician and then a hospitalist before moving back to the Houston area.

Dr. Kimble serves on the Student Health Advisory Committee and is a mentor to area youth. She is a member of the American Academy of Pediatrics, Harris County Medical Society, Texas Medical Association, and Houston Medical Forum.

She has a special interest outside of the love for the children she cares for in her clinic and chasing butterflies in their ears, she also enjoys her multiples families given her bond with them having her own sets of multiples. More recently she has had the unique opportunity to work on the reality show, Outdaughtered that can be viewed on TLC for the last few years.

Dr. Jennifer Caffey joined UTMB Pediatric Associates in 2009 after being in private practice for 5 years.  She completed her pediatric residency at UTMB in Galveston where she was Chief Resident.  She graduated from Texas A&M University with a Bachelor's of Science degree in Biomedical Science, and then earned her Doctor of Osteopathic Medicine degree from The University of North Texas Health Science Center at Fort Worth.  She is board certified by the American Board of Pediatrics and is a fellow of the American Academy of Pediatrics.

Dr. Caffey's practice focuses on caring for children of all ages.  She enjoys preventative medicine including maintenance of childhood immunizations, promoting safe environments for children, encouraging healthy eating and lifestyle habits, and advising families how to help promote normal development of their children's bodies and minds.  Dr. Caffey understands that a child's health is greatly improved with the active involvement of his or her family and encourages this by offering support to the entire family.  Her scope of practice includes patients from birth to 18 years old.  In addition to treating common childhood illnesses, she has experience caring for children with asthma, allergies, eczema, and numerous other illnesses.

Dr. Mariam Khan’s journey into medicine began with a passion for primary care, driven by the desire to build enduring relationships with patients from childhood through their golden years. While completing her medical degree at UTMB, she was initially drawn to pediatrics, and ultimately found her calling in UTMB’s Family Medicine residency program, influenced in part by her husband’s great experience within UTMB.

Dr. Khan's commitment to UTMB didn't end with her training; she chose to stay on as a practicing physician after completing her residency in 2023 and lives in the area. This decision was influenced by the camaraderie among UTMB graduates who have chosen to remain at the institution. She appreciates the stability and strong connections that come from this tight-knit community of medical professionals.

In her clinical practice, Dr. Khan's special interests lie in preventative health and evidence-based medicine, and during residency, was recognized for her dedication to compassionate care with the Arnold P. Gold Foundation Humanism and Excellence Teaching Award. She thrives on the daily challenges of her role and takes an approach involving motivational interviewing to empower her patients in managing various health issues, whether related to mental health or chronic conditions like diabetes. Her persistence and ability to connect with her patients shine through as she helps them navigate their health journey. Outside of her medical career, she cherishes family time, enjoys traveling, and has a passion for cooking.

Dr. Adri P. Smith joined UTMB Pediatric Community Based Clinics in 2006.  She completed her residency in Pediatrics at the University of Texas Medical Branch at Galveston in 2005 and received her medical degree from the University of Texas Medical School at San Antonio in 2002.  She completed her bachelor's degree in biomedical science at Texas A&M University in College Station in 1997.

Board certified by the American Board of Pediatrics, Dr. Smith has a special interest in adolescent preventative medicine, infant care, treating and preventing obesity in children and treating allergic rhinitis, atopic dermatitis and asthma.  She is a member of the American Academy of Pediatrics.  She also enjoys teaching medical students and residents and is bilingual in English and Spanish.

When she is not seeing patients, she enjoys spending time with her three children, husband, family and friends.

My name is Nyajuok Wur. I am originally from South Sudan, born in Ethiopia, raised in Minnesota and currently living in Houston, TX. My passion for medicine began at a young age and my desire to help others continues. I chose family medicine because of the variety as well as the opportunity to work with people from all ages and backgrounds.

Hobbies outside of medicine include reading mystery books, international travel, and singing.

Dr. Crystal Sierra joined UTMB Health in November 2010.  After completing her undergraduate studies at The University of Texas - Pan American in Edinburg, Texas, Dr. Sierra earned her medical degree from The University of Texas Medical Branch in Galveston in 2006. In 2009, she completed her Residency in Pediatrics at UTMB. Prior to working for UTMB, Dr. Sierra worked as a pediatrician in Clear Lake.

Dr. Sierra is board certified by The American Board of Pediatrics. She is also certified in Basic Life Support and Pediatric Advanced Life Support. She has her Texas medical license, and is a member of The American Academy of Pediatrics.

Dr. Sierra is married to Dr. James T. Sierra, a dentist in Friendswood, and they have two beautiful daughters, Gabriella and Francesca.  Dr. Sierra is fluent in Spanish and also enjoys reading and traveling with her family in her spare time.  She has enjoyed living in the area, and is excited to be giving back to the community!

Married for 36 years to Dr. Tommy Sim, an allergy/immunology specialist in Friendswood, TX. Dr. Sim is a proud mother of 3 children; Tom, diagnosed with Autism, graduated from University of Houston in HRM, currently employed at UTMB Health Clear Lake Campus hospital; Timmy, graduated from Baylor University with a BS in Biology, currently schooling in Computer Science at UHCL; and Theresa, graduated with a BS in Chemical Engineering from UT Austin. I feel empathetic to parents with children with disability. I feel a need to share my family's story about my eldest son with Autism and maybe can inspire somebody like him to strive and succeed.

I am grateful for the opportunities that came my way. I am honored for the trust that parents have given to me to take care of their children's health. I feel rewarded when I see my patients grow up healthy and become good citizens.

Her professional associations include the Texas Pediatric Society, Bay Area Pediatric Society and the Harris County Medical Society.

She believes that good listening leads to good care and appreciates the opinions of parents.

In her spare time, she enjoys playing the piano, reading and traveling with her family.

Dr. Manuela Murray received her medical degree from Instituto de Ciencias de la Salud Medical School in Medellin, Colombia in 2002. She completed her residency in Pediatrics at UTMB in 2008.

After finishing this training, she was promoted to the rank of Assistant Professor and currently serves as the Medical Director for Pediatric Urgent Care Centers and Ambulatory Operations. She is Co-Director for General Academic Pediatrics.

Her goal is to provide excellent patient care at every encounter and to make sure every patient and parent leaves the clinic with all their concerns addressed and questions answered.

Dr. Michael Binder received his MD from Texas Tech University Health Sciences Center in Lubbock, TX and completed his pediatrics internship and residency at the University of Texas Medical Branch in Galveston. Dr. Binder is Board Certified in Pediatrics by the American Board of Pediatrics. His clinical interests include all aspects of pediatrics and seeing his patients develop through the physical, emotional and social health through infancy through adolescence and young adulthood.