ICD-10-CM Alphabetic Index · FY 2026 81 Entries
Imperfect in the ICD-10-CM Index ICD-10-CM
The main term Imperfect carries 81 index entries pointing to 40 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
81
Index Entries
40
Codes Referenced
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Default Code
I
Letter
81 of 81 shown
ICD-10-CM
Index Entries Under Imperfect 81 entries · 40 codes
Imperfect
aeration, lung (newborn) NEC see Atelectasis
closure (congenital)
alimentary tract NEC Q45.8
lower Q43.8
upper Q40.8
atrioventricular ostium Q21.20
atrium (secundum) Q21.11
branchial cleft NOS Q18.2
cyst Q18.0
fistula Q18.0
sinus Q18.0
choroid Q14.3
cricoid cartilage Q31.8
cusps, heart valve NEC Q24.8
pulmonary Q22.3
ductus
arteriosus Q25.0
Botalli Q25.0
ear drum (causing impairment of hearing) Q16.4
esophagus with communication to bronchus or trachea Q39.1
eyelid Q10.3
foramen
botalli Q21.12
ovale Q21.12
genitalia, genital organ (s) or system
female Q52.8
external Q52.79
internal NEC Q52.8
male Q55.8
glottis Q31.8
interatrial ostium or septum Q21.19
interauricular ostium or septum Q21.19
interventricular ostium or septum Q21.0
larynx Q31.8
lip see Cleft, lip
nasal septum Q30.3
nose Q30.2
omphalomesenteric duct Q43.0
optic nerve entry Q14.2
organ or site not listed see Anomaly, by site
ostium
interatrial Q21.19
interauricular Q21.19
interventricular Q21.0
palate see Cleft, palate
preauricular sinus Q18.1
retina Q14.1
roof of orbit Q75.8
sclera Q13.5
septum
aorticopulmonary Q21.4
atrial (secundum) Q21.19
between aorta and pulmonary artery Q21.4
heart Q21.9
interatrial (secundum) Q21.19
interauricular (secundum) Q21.19
interventricular Q21.0
in tetralogy of Fallot Q21.3
nasal Q30.3
ventricular Q21.0
with pulmonary stenosis or atresia, dextraposition of aorta, and hypertrophy of right ventricle Q21.3
in tetralogy of Fallot Q21.3
skull Q75.009
with
anencephaly Q00.0
encephalocele see Encephalocele
hydrocephalus Q03.9
with spina bifida see Spina bifida, by site, with hydrocephalus
microcephaly Q02
spine (with meningocele) see Spina bifida
trachea Q32.1
tympanic membrane (causing impairment of hearing) Q16.4
uterus Q51.818
vitelline duct Q43.0
erection see Dysfunction, sexual, male, erectile
fusion see Imperfect, closure
inflation, lung (newborn) see Atelectasis
posture R29.3
rotation, intestine Q43.3
septum, ventricular Q21.0
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Related Index Terms
DysfunctionEncephaloceleAll index terms starting with IIndex to Diseases and InjuriesICD-10-CM Code Lookup
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.
