How VA Rates TMJ and Bruxism: DC 9905 Range of Motion and Dietary Restriction Guide

Temporomandibular joint disorder (TMJ or TMD) is evaluated under 38 CFR 4.150, Diagnostic Code 9905. Because bruxism (teeth grinding and clenching) does not have its own dedicated diagnostic code, the VA rates bruxism by analogy under DC 9905 when it results in documented joint pathology, chronic facial pain, or measurable limitation in jaw movement.

Ratings under DC 9905 are primarily determined by maximum unassisted inter-incisal movement (jaw opening measured in millimeters). When dietary restrictions do not control, ratings are: 10% for opening of 31 to 34 mm; 20% for 21 to 30 mm; 30% for 11 to 20 mm; and 40% for 0 to 10 mm. An additional 10% rating can be assigned if lateral excursion (side-to-side jaw movement) is limited to 4 mm or less.

Diagnostic Code 9905 also provides alternative rating criteria based on dietary limitations. If TMJ pathology limits the veteran to mechanically altered foods, pureed meals, or soft solids, the VA awards a 40% rating. If the condition is so severe that it restricts the veteran entirely to a full liquid diet or tube feeding, a 50% rating is assigned, representing the maximum scheduled rating under this code.

Bruxism frequently develops as a secondary consequence of psychiatric conditions such as PTSD, generalized anxiety disorder, or clinical depression. Severe psychological distress, hyperarousal during sleep, and nightmares cause involuntary clenching that damages dental enamel and inflames the temporomandibular joints. Veterans can claim TMJ or bruxism secondary to service-connected mental health conditions with a medical nexus letter.

During a TMJ Compensation and Pension examination, a dentist or oral surgeon uses a specialized millimeter gauge (such as a Therabite range of motion scale) to record active jaw opening and lateral movement. Veterans should ensure the examiner measures unassisted opening without pain, as pushing through pain violates 38 CFR 4.59. Dental records, nightguard prescriptions, and MRI imaging of the articular disc provide crucial corroboration.