ICD-10-CM Code For Secondary Parkinsonism: Group Overview
The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G21 includes parkinsonism syndromes caused by medications, toxins, metabolic conditions, structural brain lesions, or other identifiable nonidiopathic causes, and it covers clinical presentations with bradykinesia, rigidity, tremor, and gait disturbances. These ICD-10-CM diagnosis codes are used to document secondary parkinsonism etiologies, capture disease severity and neurologic involvement, and distinguish these disorders from idiopathic Parkinson disease. Accurate coding within the ICD-10-CM G21 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.
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ICD-10-CM G21: Secondary Parkinsonism Overview
The International Classification of Diseases, Tenth Revision, Clinical Modification code group G21 covers secondary parkinsonism conditions that result from identifiable causes such as medications, toxins, metabolic disorders, or structural brain lesions. These disorders affect the extrapyramidal motor system and produce parkinsonian features including bradykinesia, rigidity, tremor, and postural instability. Accurate coding matters for reimbursement because it links clinical documentation to specific etiologies and supports appropriate claim adjudication.