All ICD10 Codes

Z23

Billable
ChapterZ00–Z99
Rankcategory
Description

Encounter for immunization

About ICD-10-CM code Z23

The ICD-10-CM tabular list places Encounter for immunization at code Z23, inside Z00-Z99 Factors Influencing Health Status and Contact with Health Services, within Persons with potential health hazards related to communicable diseases (Z20-Z29). You can submit this code on claims since it carries full billing specificity.

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99).

Instructional Notes

Code First
  • any routine childhood examination
Code Also
  • , if applicable, encounter for immunization safety counseling (Z71.85)

Clinical Hierarchy

BillableHas subcodes
CH21Factors influencing health status and contact with health services (Z00-Z99)
Z20-Z29Persons with potential health hazards related to communicable diseases (Z20-Z29)
Z23Encounter for immunizationBillable

Code History

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 795
Normal Newborn
DRG 951
Other Factors Influencing Health Status

Cross Reference

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