Is Z28.1 a billable code?
Yes. Z28.1 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
Z28.1: Immunization not carried out because of patient decision for reasons of belief or group pressure
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
Z28.1 is a billable ICD-10-CM diagnosis code for immunization not carried out because of patient decision for reasons of belief or group pressure. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with Z28.1 already added.Good Faith EstimateStart a cost estimate with Z28.1 already added.CMS-1500 Claim FormFill a claim form with Z28.1 in box 21.
Other codes in Z28 Immunization not carried out and underimmunization status
- Z28.0Immunization not carried out because of contraindicationheader
- Z28.2Immunization not carried out because of patient decision for other and unspecified reasonheader
- Z28.3Underimmunization statusheader
- Z28.8Immunization not carried out for other reasonheader
- Z28.9Immunization not carried out for unspecified reason
Z28.1 questions
What does Z28.1 mean?
Z28.1 is the ICD-10-CM code for Immunization not carried out because of patient decision for reasons of belief or group pressure. It is in chapter 22, Factors influencing health status and contact with health services (Z00-Z99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.