At Cross Timbers Ear, Nose and Throat we recognize that your choice of physician is driven both by the doctor's competency and personality. With ear, nose and throat problems, you need an otolaryngologist who is experienced, understanding and supportive. You get this caring attitude from all the staff at Cross Timbers Ear, Nose and Throat every day. Our staff works together as a team to be sure we are responsive to your needs and keep you informed about your health issues. We look forward to getting to know you.

James F Leffingwell, M.D.

Founder of Cross Timbers ENT, Dr. James Leffingwell is a board-certified ENT specialist with more than 20 years experience. After receiving his medical degree from the University of Cincinnati College of Medicine in Ohio, he moved to Texas to complete an internship in general surgery and a residency in otolaryngology at the University of Texas medical Branch at Galveston.

Dr. Leffingwell is board-certified in otolaryngology and completed post-graduate work in endoscopic sinus surgery. His career interests include endoscopic surgery, nasal reconstruction, and problems associated with sinus problems, including snoring and sleep disorders.

A native of Ohio, Leffingwell graduated with highest honors from Denison University in Granville, Ohio, in 1977.

Luke Shellenberger, M.D.

Luke Shellenberger, M.D., completed his otolaryngology-head and neck surgery residency at the University of Iowa, where he trained at the University of Iowa Hospitals and Clinics and the Children’s Hospital of Iowa.  He received the 2005 Alfreda Van Wart Award for clinical resident research, as well as the 2003 Resident Teaching Award.  Prior to surgical residency training, Dr. Shellenberger obtained his M.D. from Baylor College of Medicine, where he was an Alpha Omega Alpha honors graduate and was the Exceptional Graduate in Otolaryngology-Head and Neck Surgery for 2001.

A native of College Station, Dr. Shellenberger attended Baylor University, where he graduated Summa Cum Laude in 1997.

Dr. Shellenberger’s professional interests include pediatric and general otolaryngology, especially in the surgical treatment of hearing loss, head and neck and thyroid cancers, and facial reconstruction.  He is active in several professional societies, including the American Academy of Otolaryngology, the Texas Medical Association, Board Certified in Sleep Medicine, and the Tarrant County Medical Society. He has been invited to present papers at several national academy meetings, and has published research articles in a number of national journals.  His research interests include advances in the treatment of vocal cord paralysis and management of pain after tonsillectomy.

Beyond his practice in Mansfield and Arlington, Dr. Shellenberger enjoys spending time with his two daughters, Caroline and Audrey and his son, Alex.

Allis H. Cho, M.D.

Dr. Allis Cho graduated from the University of Texas at Austin in 2002 and attended medical school at UT Southwestern in Dallas. She then completed her otolaryngology residency at Louisiana State University Health Sciences Center in Shreveport. Although a native of Los Angeles, Dr. Cho decided to return to Texas to start her practice.

In addition to general otolaryngology, her specialty interests include otology, allergy and sinus disease, facial plastics, and laryngology. Dr. Cho is a member of American Academy of Otolaryngology – Head & Neck Surgery and Texas Medical Association.

When not at work she enjoys reading, tennis, photography and traveling.

Allison Hampton Farrell, Au.D., CCC-A, FAAA 
Doctor of Audiology

Allison Farrell, Au.D., is a clinical audiologist at Cross Timbers Ear, Nose & Throat. Dr. Farrell graduated from The University of Texas at Austin with a Bachelor of Science in Communication Sciences and Disorders, and she received her Doctorate in Audiology from the University of Texas at Dallas.

Dr. Farrell is a fellow of the American Academy of Audiology and member of the American Speech-Language-Hearing Association, the American Auditory Society, and the Texas Academy of Audiology. She is licensed to practice Audiology in the state of Texas and holds the Certificate of Clinical Competency through the American Speech-Language-Hearing Association.

Dr. Farrell performs comprehensive diagnostic hearing evaluations as well as comprehensive hearing aid evaluations, fitting, and verification. Prior to joining Cross Timbers ENT, her extensive clinical experience included a variety of diagnostic testing, as well as hearing aid and cochlear implant services. She has been with Cross Timbers ENT since June 2008.