AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2016 Issue 4; ICD-10-CM NEW/REVISED CODES

Multifocal Motor Neuropathy

Code G61.82, Multifocal motor neuropathy, has been created. Multifocal motor neuropathy (MMN) is a commonly recognized progressive muscle disorder that occurs when there is a conduction block that prevents the transmission of an impulse completely down the nerve. The exact cause of the conduction block is not known but MMN is thought to be an autoimmune disorder. Motor nerve dysfunction causes muscle weakness, foot or wrist drop, and twitching that usually starts in a single limb. The condition is rare, affecting 1 of 100,000 individuals and occurs most often in men between the ages of 40-60 years...

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