Stephen Granger, DO is originally from Lafayette, Louisiana. He received his bachelor’s degree at the University of Louisiana at Lafayette in biology with a minor in chemistry. Following this, he attended medical school at William Carey University College of Osteopathic Medicine in Hattiesburg, MS. He completed residency at Oklahoma State University Medical Center in Tulsa, OK, and was appointed as Chief Resident for the 2020-2021 residency year.

Dr. Granger strives to provide patient-centered healthcare tailored to his patients’ needs. He pursued family medicine because he wanted to care for patients from all walks of life, ranging from birth to late adulthood. He believes that disease prevention is the most important aspect of medicine.

Dr. Granger’s hobbies include exercising, cooking, spending time with family, playing with his dog, and traveling. He is excited to join UTMB and would be happy to see you for all your healthcare needs.

Rosana Draper, PhD, MSN, FNP-BC is a graduate of University of Texas Medical Branch - Galveston, where she obtained her MSN as well as her PhD. Rosana specializes as an experienced board certified nurse practitioner. Her clinical interests include family medicine, healthy lifestyles and diabetes care.

I am excited to be back in the Galveston County area! I am originally from Dickinson, Texas, and my family still resides there. I received my Bachelor of Science Degree in Biochemistry with a minor in German Lingual Studies from Southwestern University in Georgetown, Texas, and my Doctorate of Osteopathic Medicine from The Texas College of Osteopathic Medicine in Fort Worth. I completed my rural family medicine training at Waco Family Medicine where I worked at a Federally Qualified Health Center for the medically underserved. I am currently board certified in Family Medicine.

My interests within medicine include taking care of infants through older adults. I also really enjoy preventative medicine and making sure that my patients have a well balanced life physically and spiritually. My interests outside of medicine include singing, cooking, and enjoying time with my family.

 Provider is LGBTQIA+ Responsive

Ms. Guzman joined the Department of Family Medicine in 2020.

Ms. Guzman earned a Bachelor of Science in Health Education and Community Health from the Texas A&M University in College Station, Texas and a Master in Physician Assistant Studies from UTMB Health in Galveston.

She is certified by the National Commission on Certification of Physician Assistants (NCCPA) and is licensed by the Texas Medical Board.

Clinical Areas of interest in pediatric medicine, adult medicine, geriatric medicine, prevention medicine, health maintenance and special interest in women’s health. I aim to provide personal, comprehensive, and continuing care for the entire family.

I enjoy spending quality time with friends and family, reading, traveling and Pilates class.

Dr. Kalia was born and raised in Texas, is a Texas A&M University Alumni, and is here to serve her community. She likes to come up with individualized realistic health plans and medical treatments with her patients. She truly enjoys the variety of medical conditions she gets to treat as a primary care physician, as well as the bonds she creates with her patients. Currently, she is an assistant clinical professor for UTMB who enjoys teaching also.

Medicine is her hobby. Outside of medicine, she enjoys spending time with her family which includes laughing at her husband's dad jokes and son's humor, cooking, audio-books, movies, volunteering, and research. Her grandmother, parents, and siblings all reside in League City.

Dr. Katherine Billingsley joined family medicine with special interest in full spectrum care as well as global health and tropical travel medicine. Dr. Billingsley studied global health in medical school and completed a Master's in Public Health followed by a Certificate in Tropical Medicine and Hygiene by the ASTMH. She has traveled to several countries for research and medical mission trips.

She enjoys her primary care practice, focusing on the whole patient as well as the prevention of disease, getting to know the whole family with members of all ages, and working with mothers and their children. She has a personal interest in caring for foster and adoptive families and their children, as she and her husband have fostered children as well.

Dr. Billingsley continues to travel to Kenya with UTMB to work at a rural mission hospital there, teaching students and residents about primary care and global health. She and her husband, Travis, loves to travel, hike, play Frisbee, swim, and connect with friends over a good board game.

Dr. Stacy Leung is an outstanding physician holding dual board certifications in Family Medicine and Sports Medicine. She successfully completed her residency in Family Medicine at UTMB and pursued a specialized Sports Medicine fellowship at UTHealth in Houston, as well as an MBA with an emphasis in healthcare. Dr. Leung's clinical expertise spans primary care, musculoskeletal health, sports medicine, and international healthcare.

A native of the Clear Lake area, Dr. Leung feels privileged to contribute to the well-being of the community where she was raised. She approaches her patients with a compassionate and respectful bedside manner, investing time to understand her patients' concerns, and ensuring active patient involvement in the treatment plan. Beyond her medical practice, she actively engages in her local church, assuming various leadership roles and serving as the medical missions coordinator. Her commitment to global health is evident through her participation in mission trips to Mexico, Guatemala, Peru, Brazil, Uganda, and Kenya.

Dr. Caryl Guillermo received her medical degree from the University of the East Ramon Magsaysay in the Philippines. She completed her residency in Family Practice at the Wichita Falls Family Practice Residency Program, an affiliate of UT-Southwestern in Dallas. Dr. Guillermo is following in the footsteps of her father, Dr. Benjamin Guillermo, who has been a practicing physician in the Clear Lake-area for over 15 years. Dr. Guillermo is board certified with the American Board of Family Medicine. She is a member of the American Academy of Family Practice and American Medical Association. Dr. Guillermo's practice philosophy is to help her patients by listening and caring for them physically, emotionally, and spiritually. She believes in empowering her patients through active participation in their treatment plan and overall health. She loves taking care of entire families and has a special interest in women's health and well-being.

When Dr. Guillermo is not at work taking care of her patients, she enjoys spending time with her family. Dr. Guillermo is a member of Bay Harbour United Methodist Church in League City. Her hobbies include reading, shopping, bowling, and tennis.

Ms. Peralta joined the UTMB Health Department of Family Medicine in 2015.

Ms. Peralta earned a Bachelor of Science in Nursing and a Master of Science in Nursing from the University of Texas Medical Branch at Galveston. She graduated with honors from the Sigma Theta Tau International Honor Society.

Ms. Peralta is certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners and is licensed by the Texas Board of Nursing.