ICD-10 Code G83.12 – Monoplegia of lower limb affecting left dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G83.12 – Monoplegia of lower limb affecting left dominant side
What it is
G83.12 identifies paralysis or severe weakness limited to the left lower limb in a patient whose left side is dominant. Use it when the record specifies monoplegia, not generalized weakness or hemiplegia.
Clinical signs
Typical findings include marked loss of voluntary movement, reduced strength, and impaired walking or weight bearing in the left leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents monoplegia of the left lower extremity and also states that the affected side is dominant. It is appropriate for neurologic deficits recorded as unilateral leg paralysis or monoplegia. Check documentation if laterality or dominance is unclear.
Do not use for
Do not use it for generalized weakness, paraplegia, or hemiplegia. Do not assign it when the record does not confirm dominant-side involvement.
Coding tip
Verify both laterality and dominance in the note before assigning G83.12.