Get started free

Z51.1

Non-billable

Encounter for antineoplastic chemotherapy and immunotherapy

Z51.1 is the ICD-10-CM code for Encounter for antineoplastic chemotherapy and immunotherapy. It is a non-billable category code — use a more specific child code such as Z51.11 for billing.

Status
Header (non-billable)
Chapter
Z00-Z99
Parent
Z51
Subcodes
2
Edition
FY2026

Z00-Z99 Factors influencing health status and contact with health services

Excludes2 — not included here

  • •encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition

Frequently asked questions

What is ICD-10 code Z51.1?
Z51.1 is the ICD-10-CM code for "Encounter for antineoplastic chemotherapy and immunotherapy". It falls under Z00-Z99 Factors influencing health status and contact with health services.
Is Z51.1 a billable code?
No — Z51.1 is a non-billable header code. Use a more specific child code (such as Z51.11) for billing.
What are the subcodes of Z51.1?
Z51.1 has 2 more specific child codes, including Z51.11, Z51.12.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

Look up another ICD-10 code or condition

Powered by Eleplan

Free ICD-10 lookup is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, with Ellie, your AI care assistant, on top of it. Free to start.

Get started freeSee how Eleplan works →