Specific code 2014 ICD-9-CM Diagnosis Code 766.21
Post-term infant
  • Billable Code
  • Newborn/Neonate Only Dx (0 years)
  • ICD-9-CM 766.21 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 766.21 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Clinical Information
  • An infant born at or after 42 weeks of gestation.
Applies To
  • Infant with gestation period over 40 completed weeks to 42 completed weeks
ICD-9-CM Coding Information
  • 766.21 is only applicable to newborns of age 0 years.
Convert to ICD-10-CM: 766.21 converts directly to:
  • 2014 ICD-10-CM P08.21 Post-term newborn
ICD-9-CM Volume 2 Index entries containing back-references to 766.21:
  • Hypermaturity (fetus or newborn)
    • post-term infant 766.21
  • Infant - see also condition
    • post-term (gestation period over 40 completed weeks to 42 completed weeks) 766.21
  • Late - see also condition
    • infant
      • post-term (gestation period over 40 completed weeks to 42 completed weeks) 766.21
      • prolonged gestation (period over 42 completed weeks) 766.22
  • Post-term (pregnancy) 645.1
    • infant (gestation period over 40 completed weeks to 42 completed weeks) 766.21
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 766.21 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.