ICD-10-CM
Z51.11: Encounter for antineoplastic chemotherapy
A billable ICD-10-CM diagnosis code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Billable code
- Category
- Z51
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Nearby codes
A header groups codes and is not billed. A billable code is one you can report.
- Z51Encounter for other aftercare and medical careHeader
- Z51.0Encounter for antineoplastic radiation therapyBillable
- Z51.1Encounter for antineoplastic chemotherapy and immunotherapyHeader
- Z51.12Encounter for antineoplastic immunotherapyBillable
- Z51.5Encounter for palliative careBillable
- Z51.6Encounter for desensitization to allergensBillable
- Z51.8Encounter for other specified aftercareHeader
- Z51.81Encounter for therapeutic drug level monitoringBillable
- Z51.89Encounter for other specified aftercareBillable
- Z51.AEncounter for sepsis aftercareBillable
It's the public CDC file. Check the current ICD-10-CM guidelines before you code.
Code also
The CDC tabular list says a second code may be needed with this one. The note does not set which is listed first.
From Z51. A note on a category applies to every code under it.
Code also condition requiring care
Excludes1
Excludes1 means these codes are not reported together.
From Z51. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From Z51.1. A note on a category applies to every code under it.
- encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition