2021 ICD-10-CM Diseases and Injuries - Index "O"

The ICD-10-CM Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s). To find the ICD-10-CM code for a specific condition browse this alphabetical index of clinical terms and conditions. Keep in mind that a condition may not appear under the exact same phrasing so make sure to use synonyms. Once you have identified the condition the ICD-10-CM code(s) should be listed next to that condition.

Term Title ICD-10-CM Code Term Notes
Obermeyer's relapsing fever (European)A68.0
ObesityE66.9
ObliqueCondition
Obliteration
Observation (following) (for) (without need for further medical care)Z04.9
Obsession, obsessional stateF42.8
Obsessive-compulsive neurosis or reactionF42.8
Obstetric embolism, septicSee: Embolism, obstetric, septic;
Obstetrical trauma (complicating delivery)O71.9
ObstipationSee: Constipation;
Obstruction, obstructed, obstructive
ObturatorCondition
Occlusal wear, teethK03.0
Occlusio pupillaeSee: Membrane, pupillary;
Occlusion, occluded
Occult
Occupational
OchlophobiaAgoraphobia
Ochronosis (endogenous)E70.29
Ocular muscleCondition
Oculogyric crisis or disturbanceH51.8
Oculomotor syndromeH51.9
Oculopathy
Oddi's sphincter spasmK83.4
OdontalgiaK08.89
OdontoameloblastomaSee: Cyst, calcifying odontogenic;
OdontoclasiaK03.89
Odontodysplasia, regionalK00.4
Odontogenesis imperfectaK00.5
Odontoma (ameloblastic) (complex) (compound) (fibroameloblastic)See: Cyst, calcifying odontogenic;
Odontomyelitis (closed) (open)K04.01
OdontorrhagiaK08.89
Odontosarcoma, ameloblasticC41.1
OestriasisSee: Myiasis;
Oguchi's diseaseH53.63
Ohara's diseaseTularemia
OHS (obesity hypoventilation syndrome)E66.2
OidiomycosisSee: Candidiasis;
Oidium albicans infectionSee: Candidiasis;
Old (previous) myocardial infarctionI25.2
Old age (without mention of debility)R54
OlfactoryCondition
OligemiaSee: Anemia;
Oligoastrocytoma
OligocythemiaD64.9
Oligodendroblastoma
Oligodendroglioma
OligodontiaSee: Anodontia;
OligoencephalonQ02
OligohidrosisL74.4
OligohydramniosO41.0
OligohydrosisL74.4
OligomenorrheaN91.5
OligophreniaSee Also: Disability, intellectual;
OligospermiaN46.11
OligotrichiaSee: Alopecia;
OliguriaR34
Ollier's diseaseQ78.4
OmenotoceleSee: Hernia, abdomen, specified site NEC;
OmentitisSee: Peritonitis;
Omentum, omentalCondition
Omphalitis (congenital) (newborn)P38.9
OmphaloceleQ79.2
Omphalomesenteric duct, persistentQ43.0
Omphalorrhagia, newbornP51.9
Omsk hemorrhagic feverA98.1
Onanism (excessive)F98.8
Onchocerciasis, onchocercosisB73.1
OncocytomaSee: Neoplasm, benign, by site;
Oncovirus, as cause of disease classified elsewhereB97.32
Ondine's curseSee: Apnea, sleep;
OneirophreniaF23
OnychauxisL60.2
OnychiaSee Also: Cellulitis, digit;
OnychitisSee Also: Cellulitis, digit;
OnychocryptosisL60.0
OnychodystrophyL60.3
Onychogryphosis, onychogryposisL60.2
OnycholysisL60.1
OnychomadesisL60.8
OnychomalaciaL60.3
Onychomycosis (finger) (toe)B35.1
Onycho-osteodysplasiaQ87.2
OnychophagiaF98.8
OnychophosisL60.8
OnychoptosisL60.8
OnychorrhexisL60.3
OnychoschiziaL60.3
Onyxis (finger) (toe)L60.0
OnyxitisSee Also: Cellulitis, digit;
Oophoritis (cystic) (infectional) (interstitial)N70.92
OophoroceleN83.4
Opacity, opacities
Opalescent dentin (hereditary)K00.5
Open, opening
Operational fatigueF48.8
OperativeCondition
OperculitisSee: Periodontitis;
OperculumSee: Break, retina;
OphiasisL63.2
OphthalmiaH10.9See Also: Conjunctivitis;
OphthalmitisOphthalmia
Ophthalmocele (congenital)Q15.8
OphthalmoneuromyelitisG36.0
OphthalmoplegiaSee Also: Strabismus, paralytic;
Opioid (s)
OpisthognathismM26.09
Opisthorchiasis (felineus) (viverrini)B66.0
Opitz' diseaseD73.2
OpiumismSee: Dependence, drug, opioid;
Oppenheim's diseaseG70.2
Oppenheim-Urbach disease (necrobiosis lipoidica diabeticorum)See: E08-E13 with .620;
Optic nerveCondition
OrbitCondition
OrchioblastomaC62.9
Orchitis (gangrenous) (nonspecific) (septic) (suppurative)N45.2
Orf (virus disease)B08.02
OrganicCondition
Orgasm
Oriental
OrificeCondition
Origin of both great vessels from right ventricleQ20.1
Ormond's disease (with ureteral obstruction)N13.5
Ornithine metabolism disorderE72.4
Ornithinemia (Type I) (Type II)E72.4
OrnithosisA70
Orotaciduria, oroticaciduria (congenital) (hereditary) (pyrimidine deficiency)E79.8
Orthodontics
OrthopneaR06.01
OrthopoxvirusB08.09
Os, uterusCondition
Osgood-Schlatter disease or osteochondrosisSee: Osteochondrosis, juvenile, tibia;
Osler (-Weber)-Rendu diseaseI78.0
Osler's nodesI33.0
OsmidrosisL75.0
OsseousCondition
Ossification
OsteitisSee Also: Osteomyelitis;
OsteoarthritisM19.90
Osteoarthropathy (hypertrophic)M19.90
Osteoarthrosis (degenerative) (hypertrophic) (joint)Osteoarthritis
OsteoblastomaSee: Neoplasm, bone, benign;
OsteochondritisSee Also: Osteochondropathy, by site;
Osteochondroarthrosis deformans endemicaSee: Disease, Kaschin-Beck;
OsteochondrodysplasiaQ78.9
OsteochondrodystrophyE78.9
OsteochondrolysisSee: Osteochondritis, dissecans;
OsteochondromaSee: Neoplasm, bone, benign;
OsteochondromatosisD48.0
OsteochondromyxosarcomaSee: Neoplasm, bone, malignant;
OsteochondropathyM93.90
OsteochondrosarcomaSee: Neoplasm, bone, malignant;
OsteochondrosisSee Also: Osteochondropathy, by site;
OsteoclastomaD48.0
OsteodyniaSee: Disorder, bone, specified type NEC;
OsteodystrophyQ78.9
OsteofibromaSee: Neoplasm, bone, benign;
OsteofibrosarcomaSee: Neoplasm, bone, malignant;
Osteogenesis imperfectaQ78.0
OsteogenicCondition
OsteolysisM89.50
OsteomaSee Also: Neoplasm, bone, benign;
OsteomalaciaM83.9
Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)M86.9
OsteomyelofibrosisD47.4
OsteomyelosclerosisD75.89
OsteonecrosisM87.9
Osteo-onycho-arthro-dysplasiaQ87.2
Osteo-onychodysplasia, hereditaryQ87.2
Osteopathia condensans disseminataQ78.8
OsteopathySee Also: Osteomyelitis, Osteonecrosis, Osteoporosis;
OsteopeniaM85.8
OsteoperiostitisSee: Osteomyelitis, specified type NEC;
Osteopetrosis (familial)Q78.2
OsteophyteM25.70
OsteopoikilosisQ78.8
Osteoporosis (female) (male)M81.0
Osteopsathyrosis (idiopathica)Q78.0
Osteoradionecrosis, jaw (acute) (chronic) (lower) (suppurative) (upper)M27.2
Osteosarcoma (any form)See: Neoplasm, bone, malignant;
OsteosclerosisQ78.2
Osteosclerotic anemiaD64.89
Osteosis
Ostium
Ostrum-Furst syndromeQ75.8
Otalgia
Otitis (acute)H66.90
OtocephalyQ18.2
Otolith syndrome
Otomycosis (diffuse) NECB36.9
OtoporosisSee: Otosclerosis;
Otorrhagia (nontraumatic)H92.2
OtorrheaH92.1
Otosclerosis (general)H80.9
OtospongiosisSee: Otosclerosis;
Otto's disease or pelvisM24.7
Outcome of deliveryZ37.9
OutletCondition
Ovalocytosis (congenital) (hereditary)See: Elliptocytosis;
OvarianCondition
OvarioceleN83.4
Ovaritis (cystic)See: Oophoritis;
Ovary, ovarianCondition
OveractiveHyperfunction
OveractivityR46.3
Overbite (deep) (excessive) (horizontal) (vertical)M26.29
OverbreathingSee: Hyperventilation;
Overconscientious personalityF60.5
OverdevelopmentSee: Hypertrophy;
OverdistensionSee: Distension;
Overdose, overdosage (drug)See: Table of Drugs and Chemicals, by drug, poisoning;
OvereatingR63.2
Overexertion (effects) (exhaustion)T73.3
Overexposure (effects)T73.9
OverfeedingOvereating
Overfill, endodonticM27.52
Overgrowth, boneSee: Hypertrophy, bone;
Overhanging of dental restorative material (unrepairable)K08.52
Overheated (places) (effects)See: Heat;
Overjet (excessive horizontal)M26.23
Overlaid, overlying (suffocation)See: Asphyxia, traumatic, due to mechanical threat;
Overlap, excessive horizontal (teeth)M26.23
Overlapping toe (acquired)See Also: Deformity, toe, specified NEC;
Overload
OvernutritionHyperalimentation
OverproductionHypersecretion
Overprotection, child by parentZ62.1
Overriding
OverstrainedR53.83
Overuse, muscle NECM70.8
OverweightE66.3
OverworkedR53.83
OviductCondition
OvotestisQ56.0
Ovulation (cycle)
OvumCondition
Owren's disease or syndrome (parahemophilia)D68.2
Ox heartSee: Hypertrophy, cardiac;
OxalosisE72.53
OxaluriaE72.53
Oxycephaly, oxycephalicQ75.0
OxyuriasisB80
Oxyuris vermicularis (infestation)B80
OzenaJ31.0