Subluxation of C2/C3 cervical vertebrae, initial encounter

This code signifies a partial dislocation or misalignment of the second and third cervical vertebrae (C2/C3) in the neck. This subluxation implies that the joint surfaces are still in partial contact but are not properly aligned, often leading to pain, restricted movement, or neurological symptoms.

Apply this code when documentation clearly indicates a C2/C3 subluxation in a patient presenting for initial treatment of this specific injury. This includes emergency department visits, initial physician office visits, or hospital admissions directly related to the onset of the subluxation. Supporting documentation would include imaging reports (X-ray, CT, MRI) confirming the subluxation and physician notes detailing the initial presentation and management plan.

• Ensure the documentation specifies C2/C3; subluxations at other cervical levels require different codes.
• The "A" seventh character indicates an initial encounter for active treatment; use subsequent characters for follow-up care or sequelae.
• Distinguish from complete dislocation (luxation), which involves a complete separation of joint surfaces.