Unsp traum nondisp spondylolysis of 2nd cervcal vert, sqla

This code describes a long-term complication or late effect resulting from a past injury to the second cervical vertebra (C2), specifically an unstated type of traumatic spondylolisthesis that was nondisplaced. It indicates that the vertebral body has slipped forward relative to the vertebra below it, but the displacement was not significant enough to be classified as displaced, and the original trauma occurred in the past.

Use this code when documenting a patient presenting with ongoing symptoms or conditions directly attributable to a previously sustained, nondisplaced traumatic spondylolisthesis of C2. The patient's medical record must clearly indicate that the initial injury occurred in the past and that the current presentation is a sequela. Documentation should specify the C2 level and confirm the nondisplaced nature of the spondylolisthesis.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela or current condition being treated.
• Ensure documentation explicitly states "sequela" or "late effect" and links the current condition to the past C2 spondylolisthesis.
• Do not use this code for acute injuries; refer to the appropriate acute traumatic spondylolisthesis codes for initial encounters.