Z23

Billable

Encounter for immunization

Z23 is the ICD-10-CM code for Encounter for immunization. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
Z00-Z99
Edition
FY2026

Z00-Z99 Factors influencing health status and contact with health services

Code first

  • any routine childhood examination

Notes

  • procedure codes are required to identify the types of immunizations given
  • , if applicable, encounter for immunization safety counseling (Z71.85)

Frequently asked questions

What is ICD-10 code Z23?
Z23 is the ICD-10-CM code for "Encounter for immunization". It falls under Z00-Z99 Factors influencing health status and contact with health services.
Is Z23 a billable code?
Yes — Z23 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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