Hi Guest LV!
What we are finding is that the code that is most commonly accepted by medical insurers currently for TMD appliances since the S8262 discontinuation June 2015 is D7880. However, some insurers are accepting the other codes listed below as well:
D7880 - occlusal orthotic device, by report
D7899 - unspecified TMD therapy, by report
Or, if the medical insurer says they won’t process the “D” codes (most will these days, but you will run into a few that won’t), you can try:
E1399 - Durable medical equipment, miscellaneous
21499 - Unlisted musculoskeletal procedure, head
A narrative report explaining the treatment accompanying the claim is recommended since they are all "by report", “unlisted”, or "miscellaneous" codes.
We do not recommend the use of 21110, as the description of this code is: Application of interdental fixation device for conditions other than fracture or dislocation, include removal
...and the appliances being used to treat TMD that most of our clients use are not interdental fixation devices, they are removable.
For example, Aetna's medical policy for Temporomandibular disorders lists D7880 as an accepted HCPCS code is criteria is met:
http://www.aetna.com/cpb/medical/data/1_99/0028.html Hope this helps, have a great day!