Z51.1
Non-billableEncounter for antineoplastic chemotherapy and immunotherapy
Encounter for antineoplastic chemotherapy and immunotherapy
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •follow-up examination for medical surveillance after treatmentZ08-Z09
- encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition
Code Also
A second code may be required; sequencing depends on circumstances
- condition requiring care
Child Codes (2)
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(1)
Frequently Asked Questions
What is the ICD-10 code for encounter for antineoplastic chemotherapy and immunotherapy?
The ICD-10-CM code for encounter for antineoplastic chemotherapy and immunotherapy is Z51.1. The full clinical description is "Encounter for antineoplastic chemotherapy and immunotherapy". Z51.1 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code Z51.1 mean?
ICD-10-CM code Z51.1 represents “Encounter for antineoplastic chemotherapy and immunotherapy”. It is classified under Chapter 22: Factors Influencing Health Status and Contact With Health Services and is a non-billable header code. Use a more specific child code for billing purposes.
Is Z51.1 a billable code?
No, Z51.1 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under Z51.1.
What chapter is Z51.1 in?
Z51.1 is in Chapter 22: Factors Influencing Health Status and Contact With Health Services (codes Z00-Z99).
What codes cannot be used with Z51.1?
Z51.1 has Excludes1 notes indicating codes that cannot be used together with it, including: follow-up examination after treatment (Z08-Z09).
What are the subcategories under Z51.1?
Z51.1 has 2 child codes, including: Z51.11 (Encounter for antineoplastic chemotherapy), Z51.12 (Encounter for antineoplastic immunotherapy).
What are the UMLS CUIs for Z51.1?
Z51.1 is linked to 1 UMLS Concept Unique Identifier: C0476658. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Z51.1 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like encounter for antineoplastic chemotherapy and immunotherapy affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of Z51.1?
Z51.1 maps to the ICD-11 code: QB97 (Contact with health services for chemotherapy session for neoplasm).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.