All ICD10 Codes

Z51.11

Billable
ChapterZ00–Z99
Ranksubcategory
Official Description

Encounter for antineoplastic chemotherapy

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99).
General instructions are available for the parent sections:
View Z40-Z53 NotesView Z51 NotesView Z51.1 Notes

Clinical Hierarchy

CH21Factors influencing health status and contact with health services (Z00-Z99)
Z40-Z53Encounters for other specific health care (Z40-Z53)
Z51Encounter for other aftercare and medical care
Z51.1Encounter for antineoplastic chemotherapy and immunotherapy
Z51.11Encounter for antineoplastic chemotherapy

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Z51.11:

subcategoryZ51.1
Encounter for antineoplastic chemotherapy and immunotherapy
View context instructions
categoryZ51
Encounter for other aftercare and medical care
View context instructions
blockZ40-Z53
Encounters for other specific health care (Z40-Z53)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Z51.11. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

4 raw paths
Chemotherapy (session) (for)2 unique routes
cancer→Z51.11
neoplasm→Z51.11
Encounter (with health service) (for)1 unique routes
chemotherapy for neoplasm→Z51.11
Maintenance (encounter for)1 unique routes
antineoplastic chemotherapy→Z51.11

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 826
Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC
DRG 827
Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC
DRG 828
Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC
DRG 829
Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC
DRG 830
Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC
DRG 837
Chemotherapy with Acute Leukemia as Secondary Diagnosis or with High Dose Chemotherapy Agent with MCC
DRG 838
Chemotherapy with Acute Leukemia as Secondary Diagnosis with CC or High Dose Chemotherapy Agent
DRG 839
Chemotherapy with Acute Leukemia as Secondary Diagnosis without CC/MCC
DRG 846
Chemotherapy without Acute Leukemia as Secondary Diagnosis with MCC
DRG 847
Chemotherapy without Acute Leukemia as Secondary Diagnosis with CC
DRG 848
Chemotherapy without Acute Leukemia as Secondary Diagnosis without CC/MCC

Cross Reference

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