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Doctor and Patient



Board Certified, American Board of Internal Medicine Certified in Advanced Cardiac Life Support, Advanced Trauma Life Support, and Pediatric Advanced Life Support Certified Medical Review Officer, Member of American Academy of Urgent Care Medicine, Member of Urgent Care Association of America.

Dr. Ogunro attended medical school in his native Nigeria and subsequently completed a residency in Internal medicine at the Columbia College of Providers and Surgeons at Harlem Hospital in New York in 1997. Dr. Ogunro always had a passion for Emergency medicine and after a year of private practice, in 1998 began working as an Emergency room provider. He has been practicing Emergency Medicine ever since working at several area hospitals including Methodist Willowbrook and Tomball Regional. He is a member of the Harris County Medical Society and Texas Medical Association Dr. Ogunro lives in Houston with his wife Elama and their two children, Joseph and Faith, and is active in Northwest Community events.


Board Certified, American Board of Internal Medicine, Certified in Advanced Cardiac Life Support, and Pediatric Advanced Life Support, Member American College of Providers

Dr. Okonji earned her medical degree from the Baylor College of Medicine in 2001 and subsequently stayed there completing her residency in 2004. She has since practiced medicine as a hospitalist at St Lukes Episcopal Hospital, and worked in private practice at CEB Medical Assoc for 5 years in addition to working in the Emergency room prior to joining Excel Urgent Care. Dr. Okonji is a member of the Texas Medical Association and Harris County Medical Society.



Board certified American Board of Family Medicine, Board certified American Board of Preventive Medicine- Occupational Medicine, Member American Academy of Family Physicians, Member American College of Occupational and Environmental Medicine.

Dr. Hekerem earned his medical degree from the University of Port Harcourt Nigeria in 2003. He completed his family medicine residency in 2012 at the Southwest Oklahoma Family Practice Residency in Lawton Oklahoma. He completed a fellowship in occupational medicine in 2014 at the University of Texas School of Public Health where he also obtained a Master of Public Health degree.

Dr. Hekerem since graduation from residency has practiced medicine in the emergency room, several outpatient clinics and occupational medicine clinics. Outside of work, Dr. Hekerem enjoys watching soccer, listening to music and spending time with his children.


Dr. Jorge R. Valencia, MD earned his medical degree from the Military University in Bogota, Colombia and finish his family practice residency in Wichita Falls, Texas in 1999. He has been board certified in Family Medicine for 19 years. He has experience in teaching, hospital medicine, private practice and for the last 10 years he has worked in urgent care and emergency medicine. He was working for 8 years at the Cypress Fairbanks Urgent Care Center prior to joint Excel Urgent Care. He has been a hospitalist for Cypress Fairbanks Medical Center since 2015. He is member of the American Medical Association, Texas Medical Association, Harris County Medical Society and the American Academy of Family Physicians. He is fluent in English and Spanish.


Diane Hughes is a distinguished Family Nurse Practitioner whose academic and professional journey is a testimate to her dedication to excellence in healthcare. Dian is a proud alumnus of the University of Texas-Houston where she achieved her Master's Certification as a Family Nurse Practioner and further honed her skills with a Post Master's Certification in Emergency Room trauma.

Her role as an ENP nurse is elevated by a decade-long tenure as Emergency Room Charge Nurse, where leadership and medical acuent were her trademarks. Diane's commitment to her patients is mirrored by her proficiency in Advanced Cardiac Life Support, ensuring the highest standard of care in critical situations. Outside of urgent care, Diane enjoys time with her spouse, gardening, swimming, and is an active member of the Second Baptist Church in Cypress.


Latoya Abernathy is an alumna of California State University San Bernardino, where she earned her Bachelor of Science in Kinesiology in 2003. She furthered her education at Charles R. Drew University in Los Angeles, obtaining her degree in Physician Assistant Studies in 2009. With a diverse background in primary care, sports medicine/orthopedics, and dermatology, LaToya brings a wealth of experience to her practice. Outside of her professional life, she has a passion for global travel, immersing herself in different cultures, savoring new cuisines, and cherishing moments with her family and friends.


Laura Shepherd is a proud graduate of the University of Texas Health Sciences Center in Houston. She is deeply committed to raising health awareness within the community, focusing on a variety of health-related issues. Residing in Richmond, TX with her spouse, Laura cherishes her leisure time, often spent in the embrace of nature with her family or exploring new destinations through travel. 


Amy Mann, Minnesota native and long-term Katy, Texas resident, is an experienced nurse with a background in geology and secondary science education. Her nursing career, which includes specialties in various clinical areas, began after the birth of her child and led to her ADN from Lone Star College in 2007. Amy later achieved her Family Nurse Practitioner master's degree from UT Health Houston Cizik School of Nursing, inspired by a friend. She has worked in family practice and urgent care, focusing on comprehensive, compassionate care for all ages and continuously seeks to expand her professional expertise.


Marissa Pangan is a dedicated Nurse Practitioner whose academic journey led her from a Bachelor of Science in Nursing to a Master of Science in Nursing, achieving her degrees from St. Paul University in 1994 and 1996. She further honed her skills, graduating from the Nurse Practitioner program at Houston Christian University in 2020.

Her extensive nursing experience spans a variety of clinical settings, with a significant 13-year tenure in the Emergency Department before she transitioned to the Nurse Practitioner role. Beyond her professional achievements, Marissa enjoys the tranquility of gardening and the vitality of running, pursuits that reflect her commitment to a balanced and healthy lifestyle.


Amelia Shelby-Nwokeji, MD, is a Board-certified Family Physician with more than 15 years of experience in emergency medicine and urgent care. Originally from Cleveland, Ohio, she completed her undergraduate degree at Columbia University in New York, NY, before attending medical school at Howard University College of Medicine.  Her family medicine training was completed at Georgetown University in Washington DC.  She settled in the Houston area in 2005 with her husband, urologist Cordell Nwokeji, MD, and their 3 children. When not caring for patients, Dr. Nwokeji loves traveling, cooking and spending time with her church, family and friends.

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