Non-specific code 2014 ICD-9-CM Diagnosis Code 359.2
Myotonic disorders
  • Non-Billable Code
  • There are 5 ICD-9-CM codes below 359.2 that define this diagnosis in greater detail. Do not use this code on a reimbursement claim.
Clinical Information
  • An inherited or acquired, localized or generalized disorder affecting the muscles. It may be associated with abnormalities in the chloride or sodium channels of the muscles. It is characterized by delayed muscle relaxation following stimulation or contraction. Representative examples include myotonia congenita and myotonic dystrophy.
  • Diseases characterized by myotonia, which may be inherited or acquired. Myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition. These disorders may be associated with abnormal muscle sodium channel and chloride channels. Myotonic dystrophy and myotonia congenita represent two relatively common forms of this disorder. Proximal myotonic myopathy often presents with myotonia and muscle pain in early adulthood and later in life thigh muscle weakness and cataracts develop. (from Adams et al., Principles of Neurology, 6th ed, p1392)
359.2 Excludes
  • periodic paralysis (359.3)
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 359.2 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.