If the VA already service-connected your tmj dysfunction (also called TMJ, TMD, temporomandibular joint, jaw pain), it can cause or worsen other conditions that are ratable on their own. These "secondary" claims are where many veterans leave money on the table. Below is what a service-connected tmj dysfunction commonly leads to, why, and what evidence each one takes.
Temporomandibular disorder is rated under 38 CFR 4.150, DC 9905, mainly by how far you can open your mouth without help (the "interincisal range," measured in millimeters) and whether a physician has recorded that you need a texture-modified diet. For VA purposes a normal maximum opening is 35 to 50 mm.
| Maximum unassisted opening | Rating |
|---|---|
| 0 to 10 mm | 40% (50% with all foods mechanically altered) |
| 11 to 20 mm | 30% (40% with all foods mechanically altered) |
| 21 to 29 mm | 20% (30% soft/semi-solid diet, 40% liquid/pureed diet) |
| 30 to 34 mm | 10% (20% soft/semi-solid diet, 30% liquid/pureed diet) |
| Side-to-side (lateral excursion) motion of 0 to 4 mm | 10% |
Opening and side-to-side ratings are not combined with each other. A diet-based increase needs the texture-modified diet recorded or verified by a physician (38 CFR 4.150, DC 9905, Notes 1 to 3).
A secondary claim only works if the primary condition (tmj dysfunction) is already service-connected, and you have a nexus — a doctor's opinion that it is "at least as likely as not" the cause. Nexus letter sample and template →
Jaw-joint dysfunction and clenching are a well-recognized trigger for tension and migraine-type headaches.
What you'd need: A headache diagnosis, a frequency/severity log, and a nexus opinion tying them to the TMJ condition.
Chronic grinding (bruxism) fractures and wears teeth. Note VA rates most dental conditions for treatment eligibility rather than compensation, but the link is worth documenting.
What you'd need: Dental records showing the damage and a note connecting it to bruxism/TMJ.