Hi Guest!

Great question. Ever since the medical S8262 code discontinuation several years ago (which was a code that was commonly used to represent appliances/orthotics being used to treat TMJ disorders for several years), what we have found is that the two codes that are currently most commonly accepted by medical insurers for TMJD appliances are:
D7880 - occlusal orthotic device, by report
21299 - Unlisted craniofacial and maxillofacial procedure


We do run into some medical insurers that will say they won't process codes beginning with a "D" (D7880), but many do.

The wording you want to use is typically is "removable intra-oral appliance/device to treat TMJ disorder".

For example, here is a link to Aetna's medical policy for TMJ disorders:
http://www.aetna.com/cpb/medical/data/1_99/0028.html

In this policy, their wording states:

"Reversible Intra-Oral Appliances:

(i.e., removable occlusal orthopedic appliances-orthotics, stabilization appliances, occlusal splints, bite appliances/planes/splints, mandibular occlusal repositioning appliances [MORAs])"

Hope this helps!