Z79 ICD-10-CM Code: Long term (current) drug therapy
Z79 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
HCC Buddy Code Card
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FY 2026 Apr update / 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)
Z79
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceLong term (current) drug therapy
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for Z79. Check the code and parent instructions in the Code Book.
Excludes 2
Official- drug abuse and dependence (F11-F19)
- drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)
Related Codes
Includes
Official- long term (current) drug use for prophylactic purposes
Excludes 1
OfficialNo Excludes 1 notes are included in this display for Z79. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for Z79. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for Z79. Check the code and parent instructions in the Code Book.
Code Also
Official- any therapeutic drug level monitoring (Z51.81)
- any follow-up examination (Z08-Z09)Inherited from Z77-Z99
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- Z79
- Description
- Long term (current) drug therapy
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
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What This Code Means
Z79 is the ICD-10-CM diagnosis code for long term (current) drug therapy. Z79 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons with potential health hazards related to family and personal history and certain conditions influencing health status (z77-z99).
Header codes like Z79 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for Z79 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Includes
- long term (current) drug use for prophylactic purposes
Excludes 2, Not included here, may code separately
Code Also
- any therapeutic drug level monitoring (Z51.81)