ICD-10 Code G83.10 – Monoplegia of lower limb affecting unspecified side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G83.10 – Monoplegia of lower limb affecting unspecified side
What it is
G83.10 identifies monoplegia limited to one lower limb when the affected side is not documented. It means paralysis or severe weakness involves only one leg, without specifying right or left.
Clinical signs
Typical findings include marked loss of voluntary movement in one lower extremity, with reduced strength and functional impairment. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states monoplegia of a lower limb and does not identify the side. It fits encounter notes, discharge summaries, or problem lists that document unilateral leg paralysis or monoplegia without laterality.
If the provider names the right or left leg, code the specified side instead. If weakness is documented without monoplegia, check documentation before assigning this code.
Do not use for
Do not use G83.10 for hemiplegia, paraplegia, generalized weakness, or gait problems alone. Check documentation if the note describes paresis rather than monoplegia.
Coding tip
Always verify whether the side is omitted or simply not documented before selecting the unspecified-side code.