Other nondisp fx of first cervical vertebra, sequela

This code signifies a long-term complication or late effect resulting from a previous nondisplaced fracture of the atlas (first cervical vertebra), excluding odontoid fractures. It indicates that the initial injury has healed, but the patient continues to experience residual symptoms or conditions directly attributable to that past fracture.

Apply this code when documentation clearly states a patient is experiencing a sequela (e.g., chronic pain, limited range of motion, neurological deficits) directly linked to a previously healed, nondisplaced C1 fracture. The "S" seventh character indicates that this is a sequela, not an acute injury. Supporting documentation should specify the nature of the sequela and its causal relationship to the old fracture.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic pain, myelopathy).
• Ensure the documentation explicitly states "sequela," "late effect," or describes a chronic condition resulting from a healed fracture.
• Do not use for acute or subacute fractures; those require codes without the "S" seventh character.