Specific code 2014 ICD-9-CM Diagnosis Code 335.20
Amyotrophic lateral sclerosis
  • Billable Code
  • Adult Only Dx (15-124 years)
  • Short description: Amyotrophic sclerosis.
  • ICD-9-CM 335.20 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 335.20 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Motor neuron disease
  • Restrictive lung disease due to amyotrophic lateral sclerosis (disorder)
  • Restrictive lung mechanics due to als
  • Restrictive lung mechanics due to amyotrophic lateral sclerosis
Clinical Information
  • Progressive degeneration of the neurons that give rise to the corticospinal tract and of the motor cells of the brain stem and spinal cord, resulting in a deficit of upper and lower motor neurons.
Applies To
  • Motor neuron disease (bulbar) (mixed type)
ICD-9-CM Coding Information
  • 335.20 is only applicable to adult patients aged 15 - 124 years inclusive.
Convert to ICD-10-CM: 335.20 converts approximately to:
  • 2014 ICD-10-CM G12.21 Amyotrophic lateral sclerosis
ICD-9-CM Volume 2 Index entries containing back-references to 335.20:
  • Amyotrophia, amyotrophy, amyotrophic 728.2
    • lateral sclerosis (syndrome) 335.20
    • sclerosis (lateral) 335.20
  • Atrophy, atrophic
    • palsy, diffuse 335.20
  • Disease, diseased - see also Syndrome
    • Lou Gehrig's 335.20
    • motor neuron (bulbar) (mixed type) 335.20
  • Lou Gehrig's disease 335.20
  • Palsy (see also Paralysis) 344.9
    • atrophic diffuse 335.20
  • Paralysis, paralytic (complete) (incomplete) 344.9
    • amyotrophic 335.20
  • Sclerosis, sclerotic
    • amyotrophic (lateral) 335.20
  • Syndrome - see also Disease
    • amyotrophic lateral sclerosis 335.20
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 335.20 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.