Specific code 2008 ICD-9-CM Diagnosis Code 340
Multiple sclerosis
  • ICD-9-CM 340 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 340 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2008 version of ICD-9-CM 340.
  • More recent version(s) of ICD-9-CM 340: 2009 2010 2011 2012 2013 2014.
Disease Synonyms
  • Chronic progressive multiple sclerosis (disorder)
  • Dementia due to multiple sclerosis w behavior changes
  • Dementia due to multiple sclerosis with altered behavior
  • Dementia from multiple sclerosis
  • Exacerbation of multiple sclerosis (disorder)
  • Multiple sclerosis (MS), chronic/progressive
  • Multiple sclerosis (MS), exacerbation
  • Multiple sclerosis (MS), primary progressive
  • Multiple sclerosis (MS), relapsing progressive
  • Multiple sclerosis (MS), relapsing remitting
  • Multiple sclerosis (MS), secondary progressive
  • Multiple sclerosis, chronic/progressive
  • Multiple sclerosis, exacerbation
  • Multiple sclerosis, primary progressive
  • Multiple sclerosis, relapsing progressive
  • Multiple sclerosis, relapsing remitting
  • Multiple sclerosis, secondary progressive
  • Primary progressive multiple sclerosis
  • Relapsing progressive multiple sclerosis
  • Relapsing remitting multiple sclerosis
  • Remittent-progressive multiple sclerosis
  • Secondary progressive multiple sclerosis
Applies To
  • Disseminated or multiple sclerosis:
    • NOS
    • brain stem
    • cord
    • generalized
Convert to ICD-10-CM: 340 converts directly to:
  • 2014 ICD-10-CM G35 Multiple sclerosis
ICD-9-CM Volume 2 Index entries containing back-references to 340:
  • Demyelination, demyelinization
    • global 340
  • Diabetes, diabetic (brittle) (congenital) (familial) (mellitus) (poorly controlled) (severe) (slight) (without complication) 250.0
    • dorsal sclerosis 250.6 [340]
  • Disease, diseased - see also Syndrome
    • demyelinating, demyelinizating (brain stem) (central nervous system) 341.9
      • multiple sclerosis 340
      • specified NEC 341.8
  • Myelosclerosis 289.89
    • disseminated, of nervous system 340
  • Sclerose en plaques 340
  • Sclerosis, sclerotic
    • ascending multiple 340
    • brain (general) (lobular) 341.9
      • Alzheimer's - see Alzheimer's, dementia
      • artery, arterial 437.0
      • atrophic lobar 331.0
      • diffuse 341.1
        • familial (chronic) (infantile) 330.0
        • infantile (chronic) (familial) 330.0
        • Pelizaeus-Merzbacher type 330.0
      • disseminated 340
      • hereditary 334.2
      • infantile (degenerative) (diffuse) 330.0
      • insular 340
      • Krabbe's 330.0
      • miliary 340
      • multiple 340
      • Pelizaeus-Merzbacher 330.0
      • progressive familial 330.0
      • senile 437.0
      • tuberous 759.5
    • bulbar, progressive 340
    • cerebrospinal 340
      • disseminated 340
      • multiple 340
    • combined (spinal cord) - see also Degeneration, combined
      • multiple 340
    • disseminated 340
    • dorsal 340
    • insular 340
    • multiple (brain stem) (cerebral) (generalized) (spinal cord) 340
    • plaques 340
    • spinal (cord) (general) (progressive) (transverse) 336.8
      • ascending 357.0
      • combined - see also Degeneration, combined
      • disseminated 340
      • dorsolateral - see Degeneration, combined
      • hereditary (Friedreich's) (mixed form) 334.0
      • lateral (amyotrophic) 335.24
      • multiple 340
      • posterior (syphilitic) 094.0
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 340 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 2008 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.