Specific code 2014 ICD-9-CM Diagnosis Code 309.1
Prolonged depressive reaction
  • Billable Code
  • Short description: Prolong depressive react.
  • ICD-9-CM 309.1 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 309.1 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Adjustment disorder w depressed mood, prolonged
  • Adjustment reaction, depressive, prolonged
  • Prolonged depressive adjustment reaction
309.1 Excludes
  • affective psychoses (296.0-296.9)
  • brief depressive reaction (309.0)
  • neurotic depression (300.4)
  • psychogenic depressive psychosis (298.0)
Convert to ICD-10-CM: 309.1 converts approximately to:
  • 2014 ICD-10-CM F43.21 Adjustment disorder with depressed mood
ICD-9-CM Volume 2 Index entries containing back-references to 309.1:
  • Depression 311
    • situational (acute) (brief) 309.0
      • prolonged 309.1
  • Depressive reaction - see also Reaction, depressive
    • prolonged 309.1
    • situational (acute) 309.0
      • prolonged 309.1
  • Reaction
    • grief (acute) (brief) 309.0
      • prolonged 309.1
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 309.1 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.