ICD-10-CM Z79.890 is the diagnosis code for Hormone replacement therapy. 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.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where Z79.890 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Z79.890 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Z79.890 is the ICD-10-CM diagnosis code for "Hormone replacement therapy". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Z79.890 is Z79.89 ("Other long term (current) drug therapy"). Z79.890 provides a more specific classification within this category.
Z79.890 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 Z79.890 when the patients documented diagnosis matches "Hormone replacement therapy" 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 Hormone replacement therapy is Z79.890.
Yes, Z79.890 can be used as a primary diagnosis code since it is billable and specific.
Z79.890 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z79.890 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.