Specific code 2015 ICD-9-CM Diagnosis Code 359.22
Myotonia congenita
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 359.22 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 359.22 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 359.22 converts directly to:
  • 2015/16 ICD-10-CM G71.12 Myotonia congenita
Approximate Synonyms
  • Autosomal dominant myotonia
  • Becker muscular dystrophy
  • Beckers muscular dystrophy
  • Congenital myotonia, autosomal dominant form
  • Muscular dystrophy, Becker
  • Myotonia, autosomal dominant
Clinical Information
  • A genetic congenital neuromuscular disorder affecting the skeletal muscles. It is caused by mutations in the chloride channel gene (clcn1 gene). It is characterized by muscle stiffness, hypertrophy, pain, and cramping
  • Congenital genetic disease characterized by tonic spasm and rigidity of certain muscles when a voluntary movement is attempted; also known as thomsen's disease
  • Inherited myotonic disorders with early childhood onset myotonia. Muscular hypertrophy is common and myotonia may impair ambulation and other movements. It is classified as thomsen (autosomal dominant) or becker (autosomal recessive) generalized myotonia mainly based on the inheritance pattern. Becker type is also clinically more severe. An autosomal dominant variant with milder symptoms and later onset is known as myotonia levior. Mutations in the voltage-dependent skeletal muscle chloride channel are associated with the disorders
Applies To
  • Acetazolamide responsive myotonia congenita
  • Dominant form (Thomsen's disease)
  • Myotonia levior
  • Recessive form (Becker's disease)
ICD-9-CM Volume 2 Index entries containing back-references to 359.22:
  • Becker's
    • disease
      • idiopathic mural endomyocardial disease 425.2
      • myotonia congenita, recessive form 359.22
    • dystrophy 359.22
  • Disease, diseased - see also Syndrome
    • Becker's
      • idiopathic mural endomyocardial disease 425.2
      • myotonia congenita, recessive form 359.22
    • Thomsen's 359.22
  • Dystrophy, dystrophia 783.9
    • Becker's type 359.22
  • Myotonia (acquisita) (intermittens) 728.85
    • congenita 359.22
      • acetazolamide responsive 359.22
      • dominant form 359.22
      • recessive form 359.22
    • levior 359.22
  • Thomsen's disease 359.22
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 359.22 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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.