Z79.633 ICD-10-CM Code: Long term (current) use of mitotic inhibitor
Z79.633 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · free HCC coding tools
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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)
Z79.633
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceLong term (current) use of mitotic inhibitor
A patient is currently taking a mitotic inhibitor, a chemotherapy drug that prevents cancer cells from dividing by disrupting cell division.
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
Official- Long term (current) use of paclitaxel
- Long term (current) use of plant alkaloids
- Long term (current) use of vinblastine
- Long term (current) use of vincristine
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z79.633 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z79.633 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z79.633 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z79.633 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z79.633 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Z79.633 in this effective period.
Buddy Documentation Tip
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 →
Is Z79.633 an HCC code?
No. Z79.633 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Z79.633
- Description
- Long term (current) use of mitotic inhibitor
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Z79.633 is the ICD-10-CM diagnosis code for long term (current) use of mitotic inhibitor. A patient is currently taking a mitotic inhibitor, a chemotherapy drug that prevents cancer cells from dividing by disrupting cell division. Z79.633 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).
Z79.633 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use for vinca alkaloids (vincristine, vinblastine) and taxanes (paclitaxel, docetaxel).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z79.633 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use for vinca alkaloids (vincristine, vinblastine) and taxanes (paclitaxel, docetaxel)
- •Monitor for peripheral neuropathy as a common side effect