ICD-10-CM Alphabetic Index · FY 2026 36 Entries
Immunization in the ICD-10-CM Index ICD-10-CM
The main term Immunization carries 36 index entries pointing to 21 ICD-10-CM codes. Every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
36
Index Entries
21
Codes Referenced
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Default Code
I
Letter
36 of 36 shown
ICD-10-CM
Index Entries Under Immunization 36 entries · 21 codes
Immunization
ABO see Incompatibility, ABO
in newborn P55.1
appropriate for age
child (over 28 days old) Z00.129
with abnormal findings Z00.121
complication see Complications, vaccination
encounter for Z23
not done (not carried out) Z28.9 see also Underimmunization status
because (of)
acute illness of patient Z28.01
allergy to vaccine (or component) Z28.04
caregiver refusal Z28.82
chronic illness of patient Z28.02
contraindication NEC Z28.09
delay in delivery of vaccine Z28.83
group pressure Z28.1
guardian refusal Z28.82
immune compromised state of patient Z28.03
lack of availability of vaccine Z28.83
manufacturer delay of vaccine Z28.83
parent refusal Z28.82
patient's belief Z28.1
patient had disease being vaccinated against Z28.81
patient refusal Z28.21
religious beliefs of patient Z28.1
specified reason NEC Z28.89
of patient Z28.29
unspecified patient reason Z28.20
partial see also Underimmunization status
for COVID-19 Z28.311
Rh factor
affecting management of pregnancy NEC O36.09- Non-billable
anti-D antibody O36.01- Non-billable
from transfusion see Complication(s), transfusion, incompatibility reaction, Rh (factor)
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
