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ICD-10-CM Diagnosis Codes →
section notes
21. Factors influencing health status and contact with health services (Z00-Z99) →
section notes
Z20-Z29 Persons with potential health hazards related to communicable diseases (Z20-Z29) →
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Z28 Immunization not carried out and underimmunization status →
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Z28.3 Underimmunization status →
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Z28.310‑Z28.311   Z28.31 Underimmunization for COVID-19 status
Z28.39   Other underimmunization status
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