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Z23 - Encounter for immunization

ICD-10-CM Chapter 21: Factors influencing health status and contact with health services · Z20-Z29 Persons with potential health hazards related to communicable diseases (Z20-Z29) · Top-level category · FY2027

Includes, Excludes and Coding Notes

Code FirstFrom Z23

Sequence the underlying condition before this code.

  • any routine childhood examination
Code AlsoFrom Z23

Report an additional code when both conditions apply.

  • , if applicable, encounter for immunization safety counseling (Z71.85)
NotesFrom Z23

Instructional notes from the ICD-10-CM tabular list.

  • procedure codes are required to identify the types of immunizations given
NotesFrom Chapter Z00-Z99

Instructional notes from the ICD-10-CM tabular list.

  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Inpatient DRG Payments

DRG 9517,034 discharges

Other Factors Influencing Health Status

Avg. Medicare Payment

$4,626

Total Payment$6,055
Patient Responsibility$1,428
Hospital Charge$25,572

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with Z23.