ICD-10-CM 2027
ICD-10 code for antitumor antibiotic long-term drug therapy
From the official ICD-10-CM alphabetic index entry “Long-term (current) (prophylactic) drug therapy (use of) › antitumor antibiotic”. Page updated September 29, 2026.
About coding antitumor antibiotic long-term drug therapy
The ICD-10-CM code for antitumor antibiotic long-term drug therapy is Z79.632 (Long term (current) use of antitumor antibiotic).
Within Z79.63 (long term (current) use of chemotherapeutic agent), Z79.632 is specifically for long term (current) use of antitumor antibiotic. Related codes cover alkylating agent (Z79.630), antimetabolite agent (Z79.631), mitotic inhibitor (Z79.633) and topoisomerase inhibitor (Z79.634).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 949 (Aftercare with CC/MCC, relative weight 1.123) and DRG 950 (Aftercare without CC/MCC, relative weight 0.7664), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about antitumor antibiotic long-term drug therapy ICD-10 codes
What is the ICD-10 code for antitumor antibiotic long-term drug therapy?
- Z79.632 — Long term (current) use of antitumor antibiotic.
Is Z79.632 billable?
- Yes. Z79.632 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z79.632 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z79.632 a CC or MCC?
- No. Z79.632 is neither a CC nor an MCC under MS-DRG v44.0.