Z23
Billable codeEncounter for immunization
The ICD-10 code for encounter for immunization is Z23.
Clinical notes
Code also
Two codes may be needed to fully describe a condition, but unlike Code First/Use Additional Code, the sequencing order is not mandated by convention.
- , if applicable, encounter for immunization safety counseling (Z71.85)
Code first
This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.
- any routine childhood examination
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Z20Contact with and (suspected) exposure to communicable diseasesnon-billable header
- Z21Asymptomatic human immunodeficiency virus [HIV] infection status
- Z22Carrier of infectious diseasenon-billable header
- Z28Immunization not carried out and underimmunization statusnon-billable header
- Z29Encounter for other prophylactic measuresnon-billable header
- Z23Encounter for immunization
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- V059Approximate match
- V030Approximate match
- V031Approximate match
- V032Approximate match
- V033Approximate match
- V034Approximate match
- V035Approximate match
- V036Approximate match
- V037Approximate match
- V0381Approximate match
- V0382Approximate match
- V0389Approximate match
- V039Approximate match
- V040Approximate match
- V041Approximate match
- V042Approximate match
- V043Approximate match
- V044Approximate match
- V045Approximate match
- V046Approximate match
- V047Approximate match
- V0481Approximate match
- V0482Approximate match
- V0489Approximate match
- V050Approximate match
- V051Approximate match
- V052Approximate match
- V053Approximate match
- V054Approximate match
- V058Approximate match
- V060Approximate match
- V061Approximate match
- V062Approximate match
- V063Approximate match
- V064Approximate match
- V065Approximate match
- V066Approximate match
- V068Approximate match
- V069Approximate match
Associated MS-DRGs
Z23 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.