Is Z28.3 a billable ICD-10-CM code?

No. Z28.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Z28.3 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to communicable diseases (Z20-Z29).

Z28.3

Z28.3 — Underimmunization status

Non-billable headerICD-10-CM

Z28.3 is a non-billable header ICD-10-CM code for underimmunization status. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

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-)

Risk adjustment

Z28.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead Z28.3

2 child codes. Green means billable.

Related codes at this level

Codes that share Z28. If Z28.3 is not quite right, the correct code is usually one of these.

Questions about Z28.3

Is Z28.3 a billable ICD-10-CM code?: No. Z28.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Z28.3 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to communicable diseases (Z20-Z29).