AHA Coding Clinic® for ICD-9 - 2006 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES

Dystonia and Dyskinesia

Effective October 1, 2006, the title for code 333.6 has been changed from “idiopathic torsion dystonia” to “genetic torsion dystonia.” Code 333.7, Symptomatic torsion dystonia, has been changed to Acquired torsion dystonia. In addition, code 333.7 has been expanded to uniquely identify athetoid cerebral palsy (333.71), acute dystonia due to drugs (333.72) and other acquired torsion dystonia (333.79). Subcategory 333.8, Fragments of torsion dystonia has been further expanded to distinguish subacute dyskinesia due to drugs (333.85). Dystonia refers to abnormal...

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