NOTICE: Dr. Leffingwell will see patients only in Midlothian, and Dr. Opeoluwa Daniyan has joined our practice. Dr. Leffingwell’s established patients in Mansfield or Arlington can transition to Dr. Daniyan upon request.

James Leffingwell, M.D.

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.

specialties and expertise

Dr. Leffingwell's areas of focus include diagnosing and treating sinus problems, nasal conditions, snoring, and sleeping disorders. He is well-versed in performing endoscopic surgery and nasal reconstruction. Additionally, Dr. Leffingwell is skilled to perform cosmetic procedures, including minimally invasive treatments, laser hair removal, skin rejuvenation, and body contouring.

professional memberships

Dr. Leffingwell is associated with the following medical organizations:

  • Texas Medical Association
  • Tarrant County Medical Society
  • American Academy of Otolaryngology-Head and Neck Surgery

Refining Beauty

Visit my Refining Beauty website where we specialize in BeautiFill®, Harmony XL Pro, Opus®, and Soprano ICE™ Alma technology to provide the utmost precision and lasting outcomes for our cosmetic services.

Learn More


"Great service"



"Drs Leffingwell and Wu are very kind, attentive and seriously solved our issues fast. Thank you!"



"Dr. Leffingwell is a really amazing doctor along with the staff, especially Skye. They're very quick when it comes to getting you what you need. Dr. Leffingwell actually did my surgery because I was diagnosed with a rare form of Papillary Thyroid Carcinoma and I've had no issues with the healing process. You won't regret having him and his staff take care of you and if you're getting surgery done with him, you're in really great hands! The experience has been amazing throughout and very smooth sailing"



"For my ENT problem: everyone from the front desk to Dr. James Leffingwell— his PA, the techs who do scans, and those who do follow up — all are friendly, efficient, thorough, and mostly patient. One thing I noticed was the doctor did not ask if I had any questions. Although I know it works both ways, I like when doctors want to know."



"I was going on weeks of coughing and feeling horrible, with no answers in site. i got referred to Cross Timbers ENT and was seen that day. The front desk was very accommodating and Dr Leffingwell explained it all so I could understand what was going on. Both Skye and Dr Leffingwell went over and above with kindness and compassion. If you need and ENT, this is the place to go. Thank you Cross Timbers!!!!"