Billable / Specific Code
ICD-10-CM Z79.64 is the diagnosis code for Long term (current) use of myelosuppressive agent. This code falls under the section "Persons with potential health hazards related to family and personal history and certain conditions influencing health status" within Chapter 21 — Factors influencing health status and contact with health services (Z00-Z99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where Z79.64 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Z79.64 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Z79.64 is the ICD-10-CM diagnosis code for "Long term (current) use of myelosuppressive agent". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Z79.64 is Z79.6 ("Long term (current) use of immunomodulators and immunosuppressants"). Z79.64 provides a more specific classification within this category.
Z79.64 is located in Section Z77-Z99 — "Persons with potential health hazards related to family and personal history and certain conditions influencing health status" within Chapter 21 of the ICD-10-CM Tabular List.
Use Z79.64 when the patients documented diagnosis matches "Long term (current) use of myelosuppressive agent" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Long term (current) use of myelosuppressive agent is Z79.64.
Yes, Z79.64 can be used as a primary diagnosis code since it is billable and specific.
Z79.64 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z79.64 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.