Specific code 2014 ICD-9-CM Diagnosis Code 478.75
Laryngeal spasm
  • Billable Code
  • ICD-9-CM 478.75 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 478.75 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Croup, spasmodic
  • Laryngospasm
  • Spasmodic croup
Clinical Information
  • A disorder characterized by paroxysmal spasmodic muscular contraction of the vocal cords.
  • A disorder in which the adductor muscles of the vocal cords exhibit increased activity leading to laryngeal spasm. Laryngismus causes closure of the vocal folds and airflow obstruction during inspiration.
  • Paroxysmal spasmodic muscular contraction of the vocal cords. It is brief, usually lasting for less than one minute, interrupting the speech and breathing and may produce a high-pitched breathing sound. It may occur under anesthesia or may be associated with gastroesophageal reflex disease.
Applies To
  • Laryngismus (stridulus)
Convert to ICD-10-CM: 478.75 converts directly to:
  • 2014 ICD-10-CM J38.5 Laryngeal spasm
ICD-9-CM Volume 2 Index entries containing back-references to 478.75:
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic) 493.9
    • Millar's (laryngismus stridulus) 478.75
    • Wichmann's (laryngismus stridulus) 478.75
  • Croup, croupous (acute) (angina) (catarrhal) (infective) (inflammatory) (laryngeal) (membranous) (nondiphtheritic) (pseudomembranous) 464.4
    • false 478.75
    • spasmodic 478.75
    • stridulous 478.75
  • False - see also condition
    • croup 478.75
  • Laryngismus (acute) (infectious) (stridulous) 478.75
  • Laryngitis (acute) (edematous) (fibrinous) (gangrenous) (infective) (infiltrative) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (septic) (subglottic) (suppurative) (ulcerative) (viral) 464.00
    • stridulous 478.75
  • Laryngospasm 478.75
    • due to external agent - see Condition, respiratory, acute, due to
  • Laryngotracheitis (acute) (infectional) (viral) (see also Laryngitis) 464.20
    • pachydermic 478.75
    • stridulous 478.75
  • Millar's asthma (laryngismus stridulus) 478.75
  • Obstruction, obstructed, obstructive
    • airway NEC 519.8
      • with
        • allergic alveolitis NEC 495.9
        • asthma NEC (see also Asthma) 493.9
        • bronchiectasis 494.0
          • with acute exacerbation 494.1
        • bronchitis (see also Bronchitis, with, obstruction) 491.20
        • emphysema NEC 492.8
      • chronic 496
        • with
          • allergic alveolitis NEC 495.5
          • asthma NEC (see also Asthma) 493.2
          • bronchiectasis 494.0
            • with acute exacerbation 494.1
          • bronchitis (chronic) (see also Bronchitis, chronic, obstructive) 491.20
          • emphysema NEC 492.8
      • due to
        • bronchospasm 519.11
        • foreign body 934.9
        • inhalation of fumes or vapors 506.9
        • laryngospasm 478.75
  • Pseudocroup 478.75
  • Spasm, spastic, spasticity (see also condition) 781.0
    • glottis 478.75
      • hysterical 300.11
      • psychogenic 306.1
        • specified as conversion reaction 300.11
      • reflex through recurrent laryngeal nerve 478.75
    • larynx, laryngeal 478.75
  • Wichmann's asthma (laryngismus stridulus) 478.75
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 478.75 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.