Abnormal and prolonged contraction of the muscles of the eyes (oculogyric crisis), head, neck (torticollis or retrocollis), limbs, or trunk developing within a few days of starting or raising the dosage of a medication (such as a neuroleptic) or after reducing the dosage of a medication used to treat extrapyramidal symptoms.
333.99 (G25.71) Medication-Induced Acute Akathisia
Subjective complaints of restlessness, often accompanied by observed excessive move- ments (e.g., fidgety movements of the legs, rocking from foot to foot, pacing, inability to sit or stand still), developing within a few weeks of starting or raising the dosage of a medi- cation (such as a neuroleptic) or after reducing the dosage of a medication used to treat ex- trapyramidal symptoms.
333.85 (624.01) Tardive Dyskinesia the tongue, lower face and jaw, and extremities (but sometimes involving the pharyngeal, diaphragmatic, or trunk muscles) developing in association with the use of a neuroleptic medication for at least a few months.
Symptoms may develop after a shorter period of medication use in older persons. In some patients, movements of this type may appear after discontinuation, or after change or reduction in dosage, of neuroleptic medications, in which case the condition is called neuroleptic withdrawal—emergent dyskinesia. Because withdrawal-emergent dyskinesia is usually time-limited, lasting less than 4—8 weeks, dyskinesia that persists beyond this win- dow is considered to be tardive dyskinesia.
333.72 (624.09) Tardive Dystonia 333.99 (G25.71) Tardive Akathisia
Tardive syndrome involving other types of movement problems, such as dystonia or akathisia, which are distinguished by their late emergence in the course of treatment and their potential persistence for months to years, even in the face of neuroleptic discontinu- ation or dosage reduction.
333.1 (625.1) Medication-Induced Postural Tremor
Fine tremor (usually in the range of 8—12 Hz) occurring during attempts to maintain a pos- ture and developing in association with the use of medication (e.g., lithium, antidepres- sants, valproate). This tremor is very similar to the tremor seen with anxiety, caffeine, and other stimulants.
333.99 (625.79) Other Medication-Induced Movement Disorder
This category is for medication-induced movement disorders not captured by any of the specific disorders listed above. Examples include 1) presentations resembling neuroleptic malignant syndrome that are associated with medications other than neuroleptics and 2) other medication-induced tardive conditions.
995.29 (T43.205A) Initial encounter 995.29 (T 43.205D) Subsequent encounter 995.29 (T 43.2053) Sequelae