Specific code 2014 ICD-9-CM Diagnosis Code 379.42
Miosis (persistent), not due to miotics
  • Billable Code
  • Short description: Miosis not d/t miotics.
  • ICD-9-CM 379.42 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 379.42 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Constricted pupil
  • Miosis
  • Persistent miosis
Clinical Information
  • Pupillary constriction. This may result from congenital absence of the dilatator pupillary muscle, defective sympathetic innervation, or irritation of the conjunctiva or cornea.
Convert to ICD-10-CM: 379.42 converts directly to:
ICD-9-CM Volume 2 Index entries containing back-references to 379.42:
  • Miosis (persistent) (pupil) 379.42
  • Myosis (persistent) 379.42
    • stromal (endolymphatic) (M8931/1) 236.0
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 379.42 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.