- I.Q.
- IBDU (colonic inflammatory bowel dissease unclassified), K52.3
- ICANS (immune effector cell-associated neurotoxicity syndrome)
- Ichthyoparasitism due to Vandellia cirrhosa, B88.8
- Ichthyosis (congenital), Q80.9
- Ichthyotoxism
- Icteroanemia, hemolytic (acquired), D59.9
- Icterus
- Ictus solaris, solis, T67.01
- Id reaction (due to bacteria), L30.2
- Ideation
- Identity disorder (child), F64.9
- Idioglossia, F80.0
- Idiopathic
- Idiot, idiocy (congenital), F73
- IgE asthma, J45.909
- IIAC (idiopathic infantile arterial calcification), Q28.8
- Ileitis (chronic) (noninfectious), K52.9
- Ileocolitis, K52.9
- Ileostomy
- Ileotyphus
- Ileum
- Ileus (bowel) (colon) (inhibitory) (intestine), K56.7
- Iliac
- Iliotibial band syndrome, M76.3-
- Illiteracy, Z55.0
- Illness, R69
- Imbalance, R26.89
- Imbecile, imbecility (I.Q.35-49), F71
- Imbedding, intrauterine device, T83.39
- Imbibition, cholesterol (gallbladder), K82.4
- Imbrication, teeth,, fully erupted, M26.30
- Imerslund syndrome (-Gräsbeck), D51.1
- Immature
- Immaturity (less than 37 completed weeks)
- Immersion, T75.1
- Immobile, immobility
- Immune reconstitution syndrome [IRIS] (inflammatory), D89.3
- Immunization
- Immunocompromised NOS, D84.9
- Immunocytoma, C83.0-
- Immunodeficiency, D84.9
- Immunodeficient NOS, D84.9
- Immunosuppressed NOS, D84.9
- Immunotherapy (encounter for)
- Impaction, impacted
- Impaired, impairment (function)
- Impediment, speech, R47.9
- Impending
- Imperception auditory (acquired)
- Imperfect
- Imperfectly descended testis
- Imperforate (congenital)
- Impervious (congenital)
- Impetiginization of dermatoses, L01.1
- Impetigo (any organism) (any site) (circinate) (contagiosa) (simplex) (vulgaris), L01.00
- Impingement (on teeth)
- Implant, endometrial, N80.9
- Implantation
- Impotence (sexual), N52.9
- Impression, basilar, Q75.8
- Imprisonment, anxiety concerning, Z65.1
- Improper care (child) (newborn)
- Improperly tied umbilical cord (causing hemorrhage), P51.8
- Impulsiveness (impulsive), R45.87
- Inability to swallow
- Inaccessible, inaccessibility
- Inactive
- Inadequate, inadequacy
- Inanition, R64
- Inappropriate
- Inattention at or after birth
- Incarceration, incarcerated
- Incised wound
- Incision, incisional
- Inclusion
- Incompatibility
- Incompetency, incompetent, incompetence
- Incomplete
- Inconclusive
- Incontinence, R32
- Incontinentia pigmenti, Q82.3
- Incoordinate, incoordination
- Increase, increased
- Increta placenta, O43.22-
- Incrustation, cornea, foreign body (lead)(zinc)
- Incyclophoria, H50.54
- Incyclotropia
- Indeterminate sex, Q56.4
- India rubber skin, Q82.8
- Indigestion (acid) (bilious) (functional), K30
- Indirect
- Induratio penis plastica, N48.6
- Induration, indurated
- Inebriety (without dependence)
- Inefficiency, kidney, N28.9
- Inelasticity, skin, R23.4
- Inequality, leg (length) (acquired)
- Inertia
- Infancy, infantile, infantilism
- Infant (s)
- Infantile
- Infantilism
- Infarct, infarction
- Infecting
- Infection, infected, infective (opportunistic), B99.9
- Infective, infectious
- Infertility
- Infestation, B88.9
- Infiltrate, infiltration
- Infirmity, R68.89
- Inflammation, inflamed, inflammatory (with exudation)
- Inflation, lung, imperfect (newborn)
- Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus), J11.1
- Influenza-like disease
- Influenzal
- Infraction, Freiberg\’s (metatarsal head)
- Infraeruption of tooth (teeth), M26.34
- Infusion complication, misadventure, or reaction
- Ingestion
- Ingrowing
- Inguinal
- Inhalant-induced
- Inhalation
- Inhibition, orgasm
- Inhibitor, systemic lupus erythematosus (presence of), D68.62
- Iniencephalus, iniencephaly, Q00.2
- Injection, traumatic jet (air) (industrial) (water) (paint or dye), T70.4
- Injury, T14.90
- Inoculation
- Insanity, insane
- Insect
- Insecurity
- Insensitivity
- Insertion
- Insolation (sunstroke), T67.01
- Insomnia (organic), G47.00
- Inspiration
- Inspissated bile syndrome (newborn), P59.1
- Instability
- Institutional syndrome (childhood), F94.2
- Institutionalization, affecting child, Z62.22
- Insufficiency, insufficient
- Insufflation, fallopian, Z31.41
- Insular
- Insulinoma
- Insuloma
- Interference
- Intermenstrual
- Intermittent
- Internal
- Interrogation
- Interruption
- Interstitial
- Intertrigo, L30.4
- Intervertebral disc
- Intestine, intestinal
- Intolerance
- Intoxicated NEC (without dependence)
- Intoxication
- Intraabdominal testis, testes
- Intracranial
- Intrahepatic gallbladder, Q44.1
- Intraligamentous
- Intrathoracic
- Intrauterine contraceptive device
- Intraventricular
- Intrinsic deformity
- Intubation, difficult or failed, T88.4
- Intumescence, lens (eye) (cataract)
- Intussusception (bowel) (colon) (enteric) (ileocecal) (ileocolic) (intestine) ( rectum), K56.1
- Invagination (bowel, colon, intestine or rectum), K56.1
- Inversion
- Investigation, Z04.9
- Involuntary movement, abnormal, R25.9
- Involution, involutional
- IRDS (type I), P22.0
- Irideremia, Q13.1
- Iridis rubeosis
- Iridochoroiditis (panuveitis)
- Iridocyclitis, H20.9
- Iridocyclochoroiditis (panuveitis)
- Iridodialysis, H21.53-
- Iridodonesis, H21.89
- Iridoplegia (complete) (partial) (reflex), H57.09
- Iridoschisis, H21.25-
- Iris
- Iritis
- Iron
- Iron-miner\’s lung, J63.4
- Irradiated enamel (tooth, teeth), K03.89
- Irradiation effects, adverse, T66
- Irreducible, irreducibility
- Irregular, irregularity
- Irritable, irritability, R45.4
- Irritation
- Ischemia, ischemic, I99.8
- Ischial spine
- Ischialgia
- Ischiopagus, Q89.4
- Ischium, ischial
- Ischuria, R34
- Iselin\’s disease or osteochondrosis
- Islands of
- Islet cell tumor, pancreas, D13.7
- Isoimmunization NEC
- Isolation, isolated
- Isoleucinosis, E71.19
- Isomerism atrial appendages (with asplenia or polysplenia), Q20.6
- Isosporiasis, isosporosis, A07.3
- Isovaleric acidemia, E71.110
- Issue of
- Itch, itching
- Ivemark\’s syndrome (asplenia with congenital heart disease), Q89.01
- Ivory bones, Q78.2
- Ixodiasis NEC, B88.8