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Z28.3

Underimmunization status

Non-billableCategory

Code Hierarchy

Z28Z28.3

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

Use Additional Code

  • code, if applicable, to identify:
  • immunization not carried out because of contraindication (Z28.0-)
  • immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)
  • immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)
  • immunization not carried out for other reason (Z28.8-)

Specific Codes (2)

Z28.31Category

Underimmunization for COVID-19 status

Z28.39Billable

Other underimmunization status

Related Codes

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

Z28.8Category

Immunization not carried out for other reason

Z28.9Billable

Immunization not carried out for unspecified reason

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