Billable / Specific Code
ICD-10-CM Z79.631 is the diagnosis code for Long term (current) use of antimetabolite 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 Z79.631 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Z79.631 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Z79.631 is the ICD-10-CM diagnosis code for "Long term (current) use of antimetabolite agent". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Z79.631 is Z79.63 ("Long term (current) use of chemotherapeutic agent"). Z79.631 provides a more specific classification within this category.
Z79.631 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 Z79.631 when the patients documented diagnosis matches "Long term (current) use of antimetabolite 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 antimetabolite agent is Z79.631.
Yes, Z79.631 can be used as a primary diagnosis code since it is billable and specific.
Z79.631 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z79.631 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.