ICD-10 Code G83.31 – Monoplegia, unspecified affecting right dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G83.31 – Monoplegia, unspecified affecting right dominant side
What it is
This code identifies monoplegia, meaning paralysis or severe weakness limited to one limb, affecting the right dominant side. Use it when the record specifies the side and dominance, but not a more specific cause.
Clinical signs
Clinical features vary; refer to documentation. You may see marked loss of voluntary movement, reduced strength, or functional dependence in the right dominant limb, with findings consistent with a unilateral upper or lower extremity deficit.
When to use this code
Use G83.31 when the provider documents monoplegia of the right dominant side and does not identify a more specific neurologic diagnosis. It is appropriate for outpatient, inpatient, or rehabilitation records when laterality and dominance are clearly stated.
Code it only when the chart supports true monoplegia, not general weakness or pain alone. Check documentation if the record also describes hemiplegia, paresis, or a known underlying condition that should be coded instead.
Do not use for
Do not use this code for nonspecific limb weakness, temporary weakness, or paralysis affecting more than one limb. Check documentation if the condition is better described by another neurologic code.
Coding tip
Verify right-side dominance and limb involvement in the provider note before assigning G83.31.