ICD-10 Diagnosis Code Z79.899

Other long term (current) drug therapy

Diagnosis Code Z79.899

ICD-10: Z79.899
Short Description: Other long term (current) drug therapy
Long Description: Other long term (current) drug therapy
This is the 2018 version of the ICD-10-CM diagnosis code Z79.899

Valid for Submission
The code Z79.899 is valid for submission for HIPAA-covered transactions.

Replaced Code Additional informationCallout TooltipReplaced Code
The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2017. This codes was replaced for the FY 2018 (October 1, 2017-September 30, 2018).

This code was replaced in the 2018 ICD-10 code set with the code(s) listed below.
  • Z79.84 - Long term (current) use of oral hypoglycemic drugs

Code Classification
  • Factors influencing health status and contact with health services (Z00–Z99)
    • Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
      • Long term (current) drug therapy (Z79)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code Z79.899 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

Present on Admission (POA) Additional informationCallout TooltipPresent on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

The code Z79.899 is exempt from POA reporting.

  • Long term methotrexate user
  • Long-term current use of azathioprine
  • Long-term current use of cyclophosphamide
  • Long-term current use of drug therapy
  • Long-term current use of etanercept
  • Long-term current use of immunosuppressive drug
  • Long-term current use of infliximab
  • Long-term current use of mycophenolate
  • Taking medication for chronic disease
  • Taking multiple medications for chronic disease

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