Subluxation of C1/C2 cervical vertebrae, subs encntr

This code signifies a partial dislocation of the atlantoaxial joint (C1/C2 vertebrae) in the cervical spine. It indicates that the patient is receiving active treatment for the subluxation after the initial encounter.

Apply this code when a patient presents for follow-up care, such as physical therapy, chiropractic adjustments, or medication management, for a previously diagnosed C1/C2 subluxation. Documentation should clearly state "subsequent encounter" or indicate ongoing active treatment for the injury.

• Ensure documentation specifies the C1/C2 level; other cervical subluxations have different codes.
• Distinguish between "initial encounter" (for active treatment during the acute phase) and "subsequent encounter" (for ongoing active treatment).
• Do not use for sequelae or aftercare once active treatment is complete; consider codes from the S13.12XS category for those scenarios.