Specific code 2015 ICD-9-CM Diagnosis Code 339.81
Hypnic headache
  • 2015
  • Billable Code
  • ICD-9-CM 339.81 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 339.81 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Headache, hypnic headache
  • Hypnic headache (associated with sleep)
Clinical Information
  • A primary headache disorder which occurs exclusively during sleep and regularly awakes patients at a consistent time of night
Convert to ICD-10-CM: 339.81 converts directly to:
  • 2015 ICD-10-CM G44.81 Hypnic headache
ICD-9-CM Volume 2 Index entries containing back-references to 339.81:
  • Headache 784.0
    • hypnic 339.81
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 339.81 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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.