Ms. John joined the Department of Family Medicine in 2017.

Ms. John earned a Bachelor of Science in Nursing from Leelabai Thackersey College of Nursing at SNDT Women's University in Churchgate, Mumbai, India. She also earned earned a Bachelor of Science in Nursing, as well as a Master of Science in Nursing, from the Prairie View A&M College of Nursing in Houston, Texas.

She is certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners (AANP) and is licensed by the Texas Board of Nursing.

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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

Dr. Ben-Okoli's special interests include prevention, health maintenance, integrative medicine, counseling and adult medicine. He is dedicated to patient empowerment and patient education which are essential to helping patients achieve their medical, mental and social health goals. He is looking forward to developing lifelong relationships with his patients and their families.

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. 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. Corzo was born and raised in Barquisimeto- Venezuela. She received her Doctorate of Medicine from University Centro-occidental Lisandro Alvarado (UCLA) in Venezuela and completed a residency with the UTMB Health Family Medicine Residency in September 2017. During her training, she was exposed to broad clinical pathologies with the opportunity to learn and to have "full hands-on" training. Dr. Corzo found that her best teachers were and still are her patients from whom she learns from every single day. During her free time she enjoys going out and spending time with her family. Dr. Corzo is certified by The American Board of Family Medicine and is a member of the American Academy of Family Physicians.

Maria Escamilla is a certified nurse practitioner. She graduated with her Masters of Science in Nursing from UTMB and her clinical interests include occupational medicine and family practice medicine.

Jessica Miller grew up as a Coast Guard daughter and moved around a lot as a child. When her father retired while she was in high school, she set her roots in the community. Jessica attended Texas A&M University and obtained a bachelor's degree in biology in 2006, then attended nursing school at UTMB, graduating in 2009. Jessica first worked as a nurse in the hospital setting for two years and obtained her master's degree, graduating with honors in 2012.

Jessica works in urgent care and family practice as a Nurse Practitioner, as well as working in the ER for more experience. She enjoys providing care in the family practice setting and getting to know her patients and being able to see their continuity of care. Jessica has three children and enjoys spending time with her family when not working. As a child, Jessica did a lot of competitive horseback riding and continues to have a love for horses. She also enjoys exercising and spending time in the sun.