ICD-10 Diagnosis Code Z28.21

Immunization not carried out because of patient refusal

Diagnosis Code Z28.21

ICD-10: Z28.21
Short Description: Immunization not carried out because of patient refusal
Long Description: Immunization not carried out because of patient refusal
This is the 2018 version of the ICD-10-CM diagnosis code Z28.21

Valid for Submission
The code Z28.21 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Factors influencing health status and contact with health services (Z00–Z99)
    • Persons with potential health hazards related to communicable diseases (Z20-Z29)
      • Immunization not carried out and underimmunization status (Z28)

Information for Medical Professionals

Code Edits
The following edits are applicable to this code:
Unacceptable principal diagnosis Additional informationCallout TooltipUnacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual’s health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

Present on Admission (POA) Additional informationCallout TooltipPresent on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

The code Z28.21 is exempt from POA reporting.

  • Influenza A virus subtype H1N1 vaccination declined
  • Refusal of treatment by patient
  • Vaccine refused by patient

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