ICD-10-CM · Chapter 21 · Z00–Z99
Z28.39
Other underimmunization status
Factors influencing health status and contact with health services
Quick facts
- Code
- Z28.39
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 21 — Factors influencing health status and contact with health services
- Category
- Z28 — Immunization not carried out and underimmunization status
- Specificity
- 5 characters
How coders use this code
ICD-10-CM Z28.39 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of other underimmunization status. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in Z28
- Z28Immunization not carried out and underimmunization status
- Z28.0Immunization not carried out because of contraindication
- Z28.01Immunization not carried out because of acute illness of patient
- Z28.02Immunization not carried out because of chronic illness or condition of patient
- Z28.03Immunization not carried out because of immune compromised state of patient
- Z28.04Immunization not carried out because of patient allergy to vaccine or component
- Z28.09Immunization not carried out because of other contraindication
- Z28.1Immunization not carried out because of patient decision for reasons of belief or group pressure
- Z28.2Immunization not carried out because of patient decision for other and unspecified reason
- Z28.20Immunization not carried out because of patient decision for unspecified reason
- Z28.21Immunization not carried out because of patient refusal
- Z28.29Immunization not carried out because of patient decision for other reason
- Z28.3Underimmunization status
- Z28.31Underimmunization for COVID-19 status
- Z28.310Unvaccinated for COVID-19
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