Specific code 2009 ICD-9-CM Diagnosis Code 359.21
Myotonic muscular dystrophy
  • Short description: MYOTONIC MUSCLR DYSTRPHY.
  • ICD-9-CM 359.21 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 359.21 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).
  • You are viewing the 2009 version of ICD-9-CM 359.21.
  • More recent version(s) of ICD-9-CM 359.21: 2010 2011 2012 2013 2014 2015.
Convert to ICD-10-CM: 359.21 converts directly to:
  • 2015/16 ICD-10-CM G71.11 Myotonic muscular dystrophy
Approximate Synonyms
  • Cardiomyopathy in myotonic dystrophy
  • Dilated cardiomyopathy secondary to myotonic dystrophy
  • Dystrophia myotonica facies
  • Myotonic cataract
  • Myotonic dystrophy
  • Steinert myotonic dystrophy syndrome
Applies To
  • Dystrophia myotonica
  • Myotonia atrophica
  • Myotonic dystrophy
  • Proximal myotonic myopathy (PROMM)
  • Steinert's disease
ICD-9-CM Volume 2 Index entries containing back-references to 359.21:
  • Atrophy, atrophic
    • myotonia 359.21
  • Batten-Steinert syndrome 359.21
  • Curschmann (-Batten) (-Steinert) disease or syndrome 359.21
  • Disease, diseased - see also Syndrome
    • Batten-Steinert 359.21
    • Curschmann's 359.21
    • Steinert's 359.21
  • Dystrophy, dystrophia 783.9
    • myotonic 359.21
    • myotonica 359.21
  • Myopathy 359.9
    • proximal myotonic (PROMM) 359.21
  • Myotonia (acquisita) (intermittens) 728.85
    • atrophica 359.21
    • dystrophica 359.21
  • PROMM (proximal myotonic myotonia) 359.21
  • Steinert's disease 359.21
  • Syndrome - see also Disease
    • Batten-Steinert 359.21
    • Curschmann (-Batten) (-Steinert) 359.21
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 359.21 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 2009 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.