Re: does medical insurance cover TMJ
Each plan varies so some do and some do not or those that do, only cover certain aspects of it like therapies used to treat the symptoms of it - chiro, accupuncture, PT, tens unit, trigger point injections, pain meds and muscle relaxers, etc. Some go as far as to cover certain orthotic devices and surgery. Some have caps or limits as to what they will pay or how many treatments allowed, etc. For those that don't cover tmj, they may cover myofacial or cranio facial pain syndrome (or other similar conditions) which is similar to tmj in both symptoms and treatment. Most plans will not cover phase II treatments such as braces or restorative dental procedures like crowns even though they may be necessary to ensure the tmj problem which was treated remains in check or is stabiized.
A really good tmj dental staff will be familiar with the diagnosis and procedure codes that are accepted by most health insurance cos and will call your insurance co to find out what they do cover -even if they require you to pay up front and do not accept insurance payments. Or you can call yourself to find out what they do cover, but I have found unless you are familiar with the various diagnosis codes they will not offer alternatives that they do cover unless specifically asked about each.
Hope that helps some - unfortunately tmj falls into one of those grey categories for most health insurance cos primarily b/c it is still often thought of as being "dental" related since it has to do with the mouth (jaws, teeth, joints, condyles, etc).