Z28.01 – Immunization not carried out because of acute illness of patient
ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to communicable diseases
- Code
Z28.01(claims format:Z2801)- Description
- Immunization not carried out because of acute illness of patient
- Short description
- Immunization not crd out because of acute illness of patient
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 21. Factors influencing health status and contact with health services (Z00-Z99)
- Block
- Z20-Z29 Persons with potential health hazards related to communicable diseases
- Parent codes
- Z28 › Z28.0
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Z28 – Immunization not carried out and underimmunization status
- vaccination not carried out
- , if applicable, encounter for immunization safety counseling (Z71.85)
Index terms for Z28.01
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in Z28.0
- Z28.02 – Immunization not carried out because of chronic illness or condition of patientBillable
- Z28.03 – Immunization not carried out because of immune compromised state of patientBillable
- Z28.04 – Immunization not carried out because of patient allergy to vaccine or componentBillable
- Z28.09 – Immunization not carried out because of other contraindicationBillable
Frequently asked questions
What is ICD-10 code Z28.01?
Z28.01 is the ICD-10-CM code for immunization not carried out because of acute illness of patient, in the block Z20-Z29 (Persons with potential health hazards related to communicable diseases).
Is Z28.01 a billable code?
Yes. Z28.01 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Z28.01 belong to?
It belongs to category Z28 – Immunization not carried out and underimmunization status.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.