Arthritis of unspecified temporomandibular joint

This code signifies inflammation of the temporomandibular joint (TMJ) where the specific side (left or right) affected is not documented. It indicates a degenerative or inflammatory process impacting the articulation between the mandible and the temporal bone, leading to pain, limited jaw movement, and other TMJ dysfunction symptoms.

Use this code when the medical record clearly states "arthritis of the TMJ" but does not specify if it's the left, right, or bilateral joint. Documentation supporting its use includes clinician notes detailing TMJ pain, crepitus, or limited range of motion, with a diagnosis of arthritis, but lacking laterality.

• Avoid using this code if laterality (left, right, or bilateral) is documented; instead, choose a more specific code from the M26.64- subcategory.
• Ensure the documentation explicitly states "arthritis" of the TMJ, not just general TMJ disorder (M26.60-).
• Always query the provider for clarification on laterality if possible, to allow for more precise coding.