POA Exempt: Persons with potential health hazards related to communicable diseases (Z20-Z29) ICD-10-CM
The 47 ICD-10-CM codes in this range are exempt from Present on Admission reporting for fiscal year 2026. Hospitals assign no POA indicator for them on inpatient claims: the codes describe circumstances, such as pre-existing conditions or the cause of an injury, where asking whether the condition was present at admission adds no information.
Exempt Codes in This Range 47 codes · 5 categories
Z20 Contact with and (suspected) exposure to communicable diseases1 code
- Z20.821 Contact with and (suspected) exposure to Zika virus
Z22 Carrier of infectious disease20 codes
- Z22.0 Carrier of typhoid
- Z22.1 Carrier of other intestinal infectious diseases
- Z22.2 Carrier of diphtheria
- Z22.31 Carrier of bacterial disease due to meningococci
- Z22.321 Carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus
- Z22.322 Carrier or suspected carrier of Methicillin resistant Staphylococcus aureus
- Z22.330 Carrier of Group B streptococcus
- Z22.338 Carrier of other streptococcus
- Z22.340 Carrier of carbapenem-resistant Acinetobacter baumannii
- Z22.341 Carrier of carbapenem-sensitive Acinetobacter baumannii
- Z22.349 Carrier of Acinetobacter baumannii, unspecified
- Z22.350 Carrier of carbapenem-resistant Enterobacterales
- Z22.358 Carrier of other Enterobacterales
- Z22.359 Carrier of Enterobacterales, unspecified
- Z22.39 Carrier of other specified bacterial diseases
- Z22.4 Carrier of infections with a predominantly sexual mode of transmission
- Z22.6 Carrier of human T-lymphotropic virus type-1 [HTLV-1] infection
- Z22.7 Latent tuberculosis
- Z22.8 Carrier of other infectious diseases
- Z22.9 Carrier of infectious disease, unspecified
Z23 Encounter for immunization1 code
- Z23 Encounter for immunization
Z28 Immunization not carried out and underimmunization status17 codes
- Z28.01 Immunization not carried out because of acute illness of patient
- Z28.02 Immunization not carried out because of chronic illness or condition of patient
- Z28.03 Immunization not carried out because of immune compromised state of patient
- Z28.04 Immunization not carried out because of patient allergy to vaccine or component
- Z28.09 Immunization not carried out because of other contraindication
- Z28.1 Immunization not carried out because of patient decision for reasons of belief or group pressure
- Z28.20 Immunization not carried out because of patient decision for unspecified reason
- Z28.21 Immunization not carried out because of patient refusal
- Z28.29 Immunization not carried out because of patient decision for other reason
- Z28.310 Unvaccinated for COVID-19
- Z28.311 Partially vaccinated for COVID-19
- Z28.39 Other underimmunization status
- Z28.81 Immunization not carried out due to patient having had the disease
- Z28.82 Immunization not carried out because of caregiver refusal
- Z28.83 Immunization not carried out due to unavailability of vaccine
- Z28.89 Immunization not carried out for other reason
- Z28.9 Immunization not carried out for unspecified reason
Z29 Encounter for other prophylactic measures8 codes
- Z29.11 Encounter for prophylactic immunotherapy for respiratory syncytial virus (RSV)
- Z29.12 Encounter for prophylactic antivenin
- Z29.13 Encounter for prophylactic Rho(D) immune globulin
- Z29.14 Encounter for prophylactic rabies immune globin
- Z29.3 Encounter for prophylactic fluoride administration
- Z29.81 Encounter for HIV pre-exposure prophylaxis
- Z29.89 Encounter for other specified prophylactic measures
- Z29.9 Encounter for prophylactic measures, unspecified
Questions About This Category
Why are these codes POA exempt?
The codes for persons with potential health hazards related to communicable diseases describe circumstances where the Present on Admission question has no meaning, so CMS exempts them from the indicator. The exemption is published in the official FY 2026 CMS exempt file.
How many codes in this range are exempt?
The FY 2026 exempt list contains 47 codes in this range, effective October 1, 2025 through September 30, 2026.
Are these codes billable?
The exemption only removes the POA indicator requirement, it does not change how a code is used on claims. Billable status is shown per code: blue codes are billable, and any codes shown in the amber tone are category headers that need more characters.
More POA Exempt Categories
Source: CMS FY 2026 ICD-10-CM POA exempt file, effective October 1, 2025 through September 30, 2026. See also the Medicare Code Edits and the MS-DRG list.
