Z28.3
Non-billableUnderimmunization status
Underimmunization status
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Includes
Conditions included under this code
- vaccination not carried out
Use Additional Code
Additional codes that should follow this code
- code, if applicable, to identify:
- immunization not carried out because of contraindication (Z28.0-)
- immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)
- immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)
- immunization not carried out for other reason (Z28.8-)
Code Also
A second code may be required; sequencing depends on circumstances
- , if applicable, encounter for immunization safety counseling (Z71.85)
Child Codes (2)
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code Z28.3?
ICD-10-CM code Z28.3 represents "Underimmunization status". It is a non-billable header code — use a more specific child code for billing purposes.
Is Z28.3 a billable code?
No, Z28.3 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 Z28.3.
What chapter is Z28.3 in?
Z28.3 is in Chapter 22: Factors Influencing Health Status and Contact With Health Services (codes Z00-Z99).
What are the subcategories under Z28.3?
Z28.3 has 2 child codes, including: Z28.31 (Underimmunization for COVID-19 status), Z28.39 (Other underimmunization status).
Are additional codes required with Z28.3?
Yes, when using Z28.3 you should also code: code, if applicable, to identify:; immunization not carried out because of contraindication (Z28.0-); immunization not carried out because of patient decision for other and unspecified reason (Z28.2-); immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1); immunization not carried out for other reason (Z28.8-).
What are the UMLS CUIs for Z28.3?
Z28.3 is linked to 1 UMLS Concept Unique Identifier: C2712541. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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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.