ICD Search AI
Browse Chapters
ICD Search AIBrowse Chapters
Back to Scope Health
  1. ICD-10-CM Home
  2. Chapter 21
  3. Z20-Z29
  4. Z28

Z28

Immunization not carried out and underimmunization status

Non-billableCategory

Chapter: 21. Factors influencing health status and contact with health services

Section: Z20-Z29 - Persons with potential health hazards related to communicable diseases

Coding Guidelines

Includes

  • vaccination not carried out

Code Also

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

Specific Codes (6)

Z28.0Category

Immunization not carried out because of contraindication

Z28.1Billable

Immunization not carried out because of patient decision for reasons of belief or group pressure

Z28.2Category

Immunization not carried out because of patient decision for other and unspecified reason

Z28.3Category

Underimmunization status

Z28.8Category

Immunization not carried out for other reason

Z28.9Billable

Immunization not carried out for unspecified reason

Get started with Scope today

Spend more time caring for patients, not charting. Scope captures your patient encounters in real time and quickly generates high-quality clinical notes – and it's completely free.

AnneLisaDavid
1k+

from 1k+ happy clinicians

Get started now
HIPAA compliantSOC 2 compliant

Product

TemplatesHelp CenterTestimonials

Company

About UsContactSupport

Legal

Terms of ServicePrivacy PolicyHIPAA BAAPIPEDA ComplianceData Retention and Compliance
© 2026 Scope Health. All rights reserved.