Amy Haverty received her Bachelors of Science in Nursing from Marquette University in Milwaukee, Wisconsin in 1994. She spent five years as an RN on active duty with the Army. While in the Army, Amy worked in the Neonatal Intensive Care Unit, the Pediatrics Unit, and the Combat Support Hospital. In 1999, Amy joined UTMB Pediatric Associates in Galveston, working as Nursing Manager. She joined UTMB Pediatric Associates Alvin in 2007, after earning her Master's of Science in Nursing from UTMB, specializing in pediatrics. Amy currently cares for patients at the Friendswood Pediatric and Adult Care Clinic.

Amy is board certified as a Pediatric Nurse Practitioner. Her special interests include child nutrition and immunizations. Amy volunteers with local scouting organizations, providing medical services and training.

Roxanna Sanchez began her nursing career with her Bachelor's of Science in Nursing from the University of Texas Medical Branch (UTMB) graduating in 2008. Upon graduation, Roxanna went to work at the Texas Medical Center as an operating room and perioperative nurse working with children and adults. Roxanna's dedication towards her patients and passion for aiding in the healthcare of others lead her to pursue her Master's degree of Nursing. She wanted to be more closely involved in her patients' care and began her degree as a Family Nurse Practitioner and graduated from UTMB in 2012. She currently helps prepare future nurse practitioner students by being their mentor during clinical rotations.

Roxanna is board certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners, is bilingual and also a member of the International Nursing Honors Society, Sigma Theta Tau. She is a member of the Galveston Coalition of Advanced Practice Nurses.

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!

Alma Chavez began her career as a licensed vocational nurse and worked with the indigent at Harris County Hospital District for 5 years. Striving to advance her skills, she received her Bachelor's of Science in Nursing from the University of Texas Health Science Center at Houston in 1999. It was then that she continued to work with the indigent spending eleven years as a specialty trained RN, providing well child exams to children of all ages. Her passion for patient care then drove her to earn her Master's of Science in Nursing from UTMB, specializing in family practice.

Alma is board certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners and joined the family of caregivers at UTMB Health Pediatrics, Texas City in 2012.

Dr. Raquel Mena received her medical degree graduating cum laude from the Universidad Nacional Pedro Henriquez Urena in Santo Domingo, Dominican Republic. She completed her pediatric residency at the University of Texas Medical Branch, Galveston.

Dr. Mena's philosophy of practice is to provide parents as much information as possible to promote healthy dietary and safety habits. She welcomes questions from parents.

She is fluent in both Spanish and French. Dr. Mena resides in the Clear Lake area. In her free time, Dr. Mena enjoys reading and traveling.

Dr. Thint has been residing in Clear Lake/Friendswood area since 1994. She began her medical profession after completing her medical school in her home town, Yangon, Myanmar, in 1984. After moving to the United States, she completed her pediatric residency program at St. Agnes Hospital in Baltimore, MD (1992) and Pediatric Infectious Diseases Fellowship with the Children's National Medical Center and the Food and Drug Administration in Washington, DC (1994). Her first job was Assistant Clinical Professor position at University of Texas Medical Branch (UTMB) (1994-1996). She was responsible for teaching and research as well as taking care of both inpatients and outpatients. Her areas of interest and research were in middle ear infections.

Dr. Thint continued to see pediatric patients after she joined MacGregor Medical Group, a large multi-specialty group and continued pediatric clinical research from 1996-2002. The next adventure was a position as a pediatric hospitalist for four local hospitals in the Clear Lake/Pasadena area (Bayshore Medical Center, Clear Lake Regional Hospital, SE Memorial Hospital and Mainland Medical Center) from 2002-2007. She then joined Texas Children's Pediatrics for over 10 years (2007-2017) as a general pediatrician.

She has now come full circle and is very excited to be with UTMB again to care for your children. She is a board certified pediatrician and a mom. And she believes that listening to you is very important and that team work with you is very essential. This way she can strive to successfully keep your children at their highest quality of physical, emotional and social health.

Amy Laird- Payne was born and raised in the Brazosport Area. She is a 1996 graduate of Brazoswood High school. She received her Master's Degree in Physician Assistant Studies with an emphasis in Medical Education from The University of North Texas Health Science Center at Fort Worth in 2003.

Amy joined the UTMB Lake Jackson Pediatric Clinic in March 2018. She has worked in Pediatric Medicine as a Certified Physician Assistant in the Brazosport Area for the past 15 years and has been certified by the NCCPA since 2003.

Amy is passionate about empowering people to pursue their dreams and obtain great health. She enjoys spending time with her family and performing volunteer work in the community. She lives in the Brazosport Area with her husband and 3 children.

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.

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. Matthew J. Hay joined UTMB Pediatric Associates in 1997. Board-certified by the American Board of Pediatrics, Dr. Hay completed his residency in pediatrics and received his doctorate in medicine from the University of Texas Medical Branch in Galveston. Dr. Hay holds a bachelor's degree from Stephen F. Austin State University. He is also the Medical Director of the UTMB Health Primary and Specialty Care Clinic in Texas City.

Dr. Hay has been named the Galveston Daily News Reader's Choice Best Pediatrician of Galveston County in 2015, 2016, 2017, and 2019. Dr. Hay is currently a member of the Galveston Independent School District Board of Trustees, currently serving in his third three-year term, as well as serving as the President for six of those years. He served on the Texas Youth Commission Advisory Board after being appointed by then Texas Governor Rick Perry. He has developed a special interest in children with Attention Deficit Hyperactivity Disorder and other behavioral or school-related problems.

When he isn't seeing patients, Dr. Hay coaches the Texas A&M Galveston Lady Aggies soccer team.

 Provider is LGBTQIA+ Responsive