CROSS TIMBERS ENT - Key Persons


Brenda Duran

Job Titles:
  • Member of the Cross Timbers ENT Professionals - Meet Our Team
  • Practice Administrator
Brenda Duran is the practice administrator for Cross Timbers ENT. She is responsible for overseeing the daily operations and management of each office. Her specialty includes organizational growth, as well as evaluating the delivery of healthcare services to ensure patient satisfaction. She graduated from the University of Texas at Arlington and has over 14 years of experience in the medical field.

Dr. Allis Cho

Dr. Allis Cho is a board-certified ear, nose, and throat physician who specializes in treating disorders, such as sinus congestion and ear infections.

Dr. James Leffingwell

Dr. James Leffingwell is a board-certified ear, nose, and throat specialist in Tarrant County who provides outstanding patient-focused medical care.

Dr. Luke Shellenberger

Job Titles:
  • Certified Physician
  • Specialist
Dr. Luke Shellenberger is an ENT specialist at Cross Timbers ENT in North Texas who treats conditions that affect the ear, nose, and throat.

Dr. Opeoluwa Daniyan

Job Titles:
  • Certified Physician

Jennifer Paris

Job Titles:
  • Certified Physician Assistant
Jennifer Paris is a Certified Physician Assistant. She works alongside Dr. Shellenberger taking care of both pediatric and adult patients. She earned a Bachelor of Science Degree in cell and molecular biology from Louisiana Tech University and holds a Master of Physician Assistant Studies from The University of North Texas, Health Science Center in Fort Worth.

Jennifer Taylor

Job Titles:
  • Certified Allergy Specialist
Jennifer Taylor is one of our Certified Allergy Specialists. She has years of industry experience and has a great passion for what she does. Helping men, women, and children have an improved quality of life through professional allergy care is her specialty.

Kaitlyn Wood

Kaitlyn Wood is the Medical Aesthetician for Refining Beauty Med Spa at Cross Timbers ENT. She has studied and worked in the beauty industry since 2015. Her passion is to improve the appearance and health of skin, while boosting confidence and relaxation in patients. She believes that self-care is of upmost importance in our daily lives. In her free time, she enjoys creating art, meditating, and spending time with her animals.

Kristy Loftin-Moening

Job Titles:
  • Doctor of Audiology
Kristy Loftin-Moening is a Doctor of Audiology who specializes in the diagnosis and treatment of hearing loss. She earned a Bachelor's degree in allied health from the University of Central Arkansas and a Doctorate in Audiology from the University of Arkansas for Medical Sciences. She completed her clinical externship at Toledo Audiology with a focus on balance and vestibular disorders. She also holds an American Speech-Language-Hearing Association Certificate of Clinical Competency in Audiology (ASHA).

Linda Lopez - CHRO

Job Titles:
  • Human Resources Director
  • Member of the Cross Timbers ENT Professionals - Meet Our Team
Linda Lopez has several years of HR experience working in Spine & Orthopedics and Gastroenterology. Her background is in Employee Relations and Engagement, Benefits and Wellness Plans, Compensation and Salary Structure, Talent Management and Succession Planning. As a SHRM member she stays current in State and Federal Laws and Regulations. And holds a SHRM Certified Professional designation.

Margo Stewart

Job Titles:
  • Doctor of Audiology
Margo Stewart is a Doctor of Audiology who earned her Bachelor's degree in speech-language pathology/audiology and her Doctorate of Audiology from the University of North Texas. A native North Texan, Dr. Stewart's clinical experience consists of advanced audiologic, vestibular, and electrophysiologic assessment, as well as programming of traditional hearing aids, bone-anchored hearing aids, and cochlear implants. Dr. Stewart was born with hearing loss, which has led to a strong passion for helping individuals with hearing disorders improve their quality of life through hearing rehabilitation.

Meet Dr. Cho

Dr. Allis Cho is an ENT doctor who provides general and advanced medical care to North Texas families. She graduated from the University of Texas at Austin and attended medical school at UT Southwestern in Dallas. She then completed her otolaryngology residency at Louisiana State University Health Sciences Center in Shreveport. Dr. Cho is a member of the American Academy of Otolaryngology-Head and Neck Surgery and the Texas Medical Association

Meet Dr. Daniyan

Dr. Opeoluwa Daniyan is a board-certified physician at Cross Timbers ENT. She graduated from the University of Georgia with a major in microbiology and minor in Spanish and attended medical school at the Medical College of Georgia. She then completed her otolaryngology/head and neck surgery residency at Jackson Health System in Miami, FL.

Meet Dr. Leffingwell

James Leffingwell, M.D. is a seasoned ENT specialist and the founder of Cross Timbers ENT in North Texas. He is board-certified in otolaryngology by the American Board of Otolaryngology and has been in practice for over four decades. He completed his undergraduate education at Denison University and medical school at the University of Cincinnati College of Medicine. From there, he served his internship in general surgery and residency in otolaryngology at the University of Texas Medical Branch at Galveston. Today, he serves Midlothian, Mansfield, and Arlington, TX families with premier ear, nose, and throat care.

Meet Dr. Shellenberger

Dr. Luke Shellenberger is a board-certified physician with certifications in sleep medicine and otolaryngology. As the only ENT in Arlington, Mansfield, or Midlothian with privileges at Cook Children's Medical Center, Dr. Shellenberger specializes in identifying and treating medical conditions that impact the ear, nose, and throat. Dr. Shellenberger graduated medical school from Baylor College of Medicine and served his surgical residency at the University of Iowa.

Richard Eric Reynolds

Job Titles:
  • Doctor of Audiology
Richard Eric Reynolds is a Doctor of Audiology who has been in practice for over 30 years. He earned a Master's degree in speech and hearing science from Texas Tech University and a Doctorate in Audiology from the University of Florida. His area of focus is in hearing loss prevention, detection, diagnosis, treatment, and education. He finds the field of audiology very rewarding because he can improve the lives of others through quality hearing care.

Rosie Vu

Rosie studied and worked in the medical field in Vietnam before relocating to California in 2016. She served as a medical assistant in a pediatric clinic while completing her coursework at Orange Coast College in Costa Mesa, CA, toward certification as a Physician Assistant. She went on to earn her Master's degree in Physician Assistant studies from Augsburg University in Minneapolis, Minnesota. Beyond pediatrics, her additional areas of interest and clinical focus include ENT and family medicine. She speaks fluent Vietnamese and French. Rosie is a member of the American Academy of Physician Assistants and the Society of Physician Assistants in Otorhinolaryngology/ Head and Neck surgery. In her free time, she enjoys cooking, baking, gardening and spending quality time with her family..

Stephany Allman

Job Titles:
  • Clinical Allergy Technician
Stephany Allman is one of our Clinical Allergy Technicians and has been in ENT for over 15 years and is looking forward to serving our patients in her new role. Stephany's goal is to provide family-centered patient care to the many allergy sufferers in our community.

Tyler A. Shaw

Job Titles:
  • Certified Physician Assistant
Tyler Shaw is a Nationally Certified Physician Assistant and has specialized in Emergency Medicine and ENT since 2013. He received a Bachelor of Science in Biology from the University of Arkansas Fort Smith. He received a Master's in Physician Assistant Studies from UT Southwestern School of Health Professions. Tyler has served in the Arkansas Air National Guard since 2001 and is currently a Flight Physician Assistant. During his time off, Tyler enjoys spending time with his wife and three young children. He also enjoys working on his land in Waxahachie.