Periodic paralysis

This code signifies a group of rare genetic disorders characterized by episodes of muscle weakness or paralysis, often triggered by factors like exercise, stress, or dietary changes. These episodes are typically temporary and resolve spontaneously, but can range in severity from mild weakness to complete immobility. The underlying mechanism involves abnormal ion channel function in muscle cells.

Apply this code when documentation clearly indicates a diagnosis of periodic paralysis, such as hypokalemic, hyperkalemic, or normokalemic periodic paralysis. This code is appropriate for both acute episodes and the chronic management of the condition. Supporting documentation should include physician notes detailing the episodic nature of muscle weakness and any identified triggers.

• Differentiate from other forms of paralysis (e.g., acute flaccid paralysis) which have distinct ICD-9-CM codes.
• Specify the type of periodic paralysis (e.g., hypokalemic) if documented, as this may impact future ICD-10-CM coding.
• Do not use for transient ischemic attacks (TIAs) or stroke-related paralysis, as these are distinct neurological events.