Dislocation of jaw, left side, initial encounter

This code signifies a displacement of the temporomandibular joint (TMJ) on the patient's left side, occurring for the first time. It indicates that the condyle of the mandible has moved out of its normal articulation with the temporal bone. This condition typically presents with pain, difficulty opening or closing the mouth, and malocclusion.

Apply this code when documentation clearly states a new, acute dislocation of the left temporomandibular joint. This is appropriate for patients presenting with their first episode of jaw dislocation on the left side, requiring initial treatment. Supporting documentation should include a physician's diagnosis of left jaw dislocation and confirmation that it is an initial presentation.

• Ensure laterality is explicitly documented as "left" to avoid coding an unspecified or right-sided dislocation.
• Verify that the encounter is indeed the "initial encounter" for this specific dislocation, as subsequent encounters use different seventh characters.
• Distinguish from subluxation (S03.42XA), which involves partial displacement rather than complete separation of joint surfaces.