ICD-10 Code G82.51 – Quadriplegia, C1-C4 complete (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G82.51 – Quadriplegia, C1-C4 complete
What it is
G82.51 identifies complete quadriplegia affecting the C1 through C4 cervical spinal cord levels. It means paralysis of all four limbs due to a high cervical spinal cord injury, with complete loss of motor function below the lesion.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include absent voluntary movement in the arms and legs, severe weakness, and dependence for mobility and self-care, consistent with a complete cervical cord lesion at C1-C4.
When to use this code
Use this code when the record clearly documents complete quadriplegia at the C1-C4 level. It is appropriate for encounters describing a confirmed high cervical spinal cord injury with complete paralysis, whether acute or chronic, if that is the documented diagnosis.
Code from the provider’s documented level and completeness, not from assumptions based on symptoms alone. If the note says quadriplegia but does not specify C1-C4 or complete status, Check documentation.
Do not use for
Do not use this code for incomplete quadriplegia, paraplegia, or tetraplegia at another spinal level. Avoid using it when the documentation only states weakness, immobility, or unspecified paralysis.
Coding tip
Verify both the level and completeness in the provider note before assigning G82.51.