2025 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.
- Obermeyer's relapsing fever (European)
- Obesity
- Oblique
- Obliteration
- Observation (following) (for) (without need for further me
- Obsession, obsessional state
- Obsessive-compulsive neurosis or reaction
- Obstetric embolism, septic
- Obstetrical trauma (complicating delivery)
- Obstipation
- Obstruction, obstructed, obstructive
- Obturator
- Occlusal wear, teeth
- Occlusio pupillae
- Occlusion, occluded
- Occult
- Occupational
- Ochlophobia
- Ochronosis (endogenous)
- Ocular muscle
- Oculogyric crisis or disturbance
- Oculomotor syndrome
- Oculopathy
- Oddi's sphincter spasm
- Odontalgia
- Odontoameloblastoma
- Odontoclasia
- Odontodysplasia, regional
- Odontogenesis imperfecta
- Odontoma (ameloblastic) (complex) (compound) (fibroamelob
- Odontomyelitis (closed) (open)
- Odontorrhagia
- Odontosarcoma, ameloblastic
- Oestriasis
- Oguchi's disease
- Ohara's disease
- OHS (obesity hypoventilation syndrome)
- Oidiomycosis
- Oidium albicans infection
- Old (previous) myocardial infarction
- Old age (without mention of debility)
- Olfactory
- Oligemia
- Oligoastrocytoma
- Oligocythemia
- Oligodendroblastoma
- Oligodendroglioma
- Oligodontia
- Oligoencephalon
- Oligohidrosis
- Oligohydramnios
- Oligohydrosis
- Oligomenorrhea
- Oligophrenia
- Oligospermia
- Oligotrichia
- Oliguria
- Ollier's disease
- Omentitis
- Omentocele
- Omentum, omental
- Omphalitis (congenital) (newborn)
- Omphalocele
- Omphalomesenteric duct, persistent
- Omphalorrhagia, newborn
- Omsk hemorrhagic fever
- Onanism (excessive)
- Onchocerciasis, onchocercosis
- Oncocytoma
- Oncovirus, as cause of disease classified elsewhere
- Ondine's curse
- Oneirophrenia
- Onychauxis
- Onychia
- Onychitis
- Onychocryptosis
- Onychodystrophy
- Onychogryphosis, onychogryposis
- Onycholysis
- Onychomadesis
- Onychomalacia
- Onychomycosis (finger) (toe)
- Onycho-osteodysplasia
- Onychophagia
- Onychophosis
- Onychoptosis
- Onychorrhexis
- Onychoschizia
- Onyxis (finger) (toe)
- Onyxitis
- Oophoritis (cystic) (infectional) (interstitial)
- Oophorocele
- Opacity, opacities
- Opalescent dentin (hereditary)
- Open, opening
- Operational fatigue
- Operative
- Operculitis
- Operculum
- Ophiasis
- Ophthalmia
- Ophthalmitis
- Ophthalmocele (congenital)
- Ophthalmoneuromyelitis
- Ophthalmoplegia
- Opioid (s)
- Opisthognathism
- Opisthorchiasis (felineus) (viverrini)
- Opitz' disease
- Opiumism
- Oppenheim's disease
- Oppenheim-Urbach disease (necrobiosis lipoidica diabeticorum
- Optic nerve
- Orbit
- Orchioblastoma
- Orchitis (gangrenous) (nonspecific) (septic) (suppurative
- Orf (virus disease)
- Organic
- Orgasm
- Oriental
- Orifice
- Origin of both great vessels from right ventricle
- Ormond's disease (with ureteral obstruction)
- Ornithine metabolism disorder
- Ornithinemia (Type I) (Type II)
- Ornithosis
- Orotaciduria, oroticaciduria (congenital) (hereditary) (py
- Orthodontics
- Orthopnea
- Orthopoxvirus
- Os, uterus
- Osgood-Schlatter disease or osteochondrosis
- Osler (-Weber)-Rendu disease
- Osler's nodes
- Osmidrosis
- Osseous
- Ossification
- Osteitis
- Osteoarthritis
- Osteoarthropathy (hypertrophic)
- Osteoarthrosis (degenerative) (hypertrophic) (joint)
- Osteoblastoma
- Osteochondritis
- Osteochondroarthrosis deformans endemica
- Osteochondrodysplasia
- Osteochondrodystrophy
- Osteochondrolysis
- Osteochondroma
- Osteochondromatosis
- Osteochondromyxosarcoma
- Osteochondropathy
- Osteochondrosarcoma
- Osteochondrosis
- Osteoclastoma
- Osteodynia
- Osteodystrophy
- Osteofibroma
- Osteofibrosarcoma
- Osteogenesis imperfecta
- Osteogenic
- Osteolysis
- Osteoma
- Osteomalacia
- Osteomyelitis (general) (infective) (localized) (neonatal
- Osteomyelofibrosis
- Osteomyelosclerosis
- Osteonecrosis
- Osteo-onycho-arthro-dysplasia
- Osteo-onychodysplasia, hereditary
- Osteopathia condensans disseminata
- Osteopathy
- Osteopenia
- Osteoperiostitis
- Osteopetrosis (familial)
- Osteophyte
- Osteopoikilosis
- Osteoporosis (female) (male)
- Osteopsathyrosis (idiopathica)
- Osteoradionecrosis, jaw (acute) (chronic) (lower) (suppur
- Osteosarcoma (any form)
- Osteosclerosis
- Osteosclerotic anemia
- Osteosis
- Ostium
- Ostrum-Furst syndrome
- Otalgia
- Otitis (acute)
- Otocephaly
- Otolith syndrome
- Otomycosis (diffuse) NEC
- Otoporosis
- Otorrhagia (nontraumatic)
- Otorrhea
- Otosclerosis (general)
- Otospongiosis
- Otto's disease or pelvis
- Outcome of delivery
- Outlet
- Ovalocytosis (congenital) (hereditary)
- Ovarian
- Ovariocele
- Ovaritis (cystic)
- Ovary, ovarian
- Overactive
- Overactivity
- Overbite (deep) (excessive) (horizontal) (vertical)
- Overbreathing
- Overconscientious personality
- Overdevelopment
- Overdistension
- Overdose, overdosage (drug)
- Overeating
- Overexertion (effects) (exhaustion)
- Overexposure (effects)
- Overfeeding
- Overfill, endodontic
- Overgrowth
- Overhanging of dental restorative material (unrepairable)
- Overheated (places) (effects)
- Overjet (excessive horizontal)
- Overlaid, overlying (suffocation)
- Overlap, excessive horizontal (teeth)
- Overlapping toe (acquired)
- Overload
- Overnutrition
- Overproduction
- Overprotection, child by parent
- Overriding
- Overstrained
- Overuse, muscle NEC
- Overweight
- Overworked
- Oviduct
- Ovotestis
- Ovulation (cycle)
- Ovum
- Owren's disease or syndrome (parahemophilia)
- Ox heart
- Oxalosis
- Oxaluria
- Oxycephaly, oxycephalic
- Oxyuriasis
- Oxyuris vermicularis (infestation)
- Ozena
Obermeyer's relapsing fever (European)
Obesity
Oblique
Obliteration
Observation (following) (for) (without need for further medical care)
Obsession, obsessional state
Obsessive-compulsive neurosis or reaction
Obstetric embolism, septic
Obstetrical trauma (complicating delivery)
Obstipation
See: Constipation;
Obstruction, obstructed, obstructive
Obturator
Occlusal wear, teeth
Occlusio pupillae
See: Membrane, pupillary;
Occlusion, occluded
Occult
Occupational
Ochlophobia
Ochronosis (endogenous)
Ocular muscle
Oculogyric crisis or disturbance
Oculomotor syndrome
Oculopathy
Oddi's sphincter spasm
Odontalgia
Odontoameloblastoma
Odontoclasia
Odontodysplasia, regional
Odontogenesis imperfecta
Odontoma (ameloblastic) (complex) (compound) (fibroameloblastic)
Odontomyelitis (closed) (open)
Odontorrhagia
Odontosarcoma, ameloblastic
Oestriasis
See: Myiasis;
Oguchi's disease
Ohara's disease
OHS (obesity hypoventilation syndrome)
Oidiomycosis
See: Candidiasis;
Oidium albicans infection
See: Candidiasis;
Old (previous) myocardial infarction
Old age (without mention of debility)
Olfactory
Oligemia
See: Anemia;
Oligoastrocytoma
Oligocythemia
Oligodendroblastoma
Oligodendroglioma
Oligodontia
See: Anodontia;
Oligoencephalon
Oligohidrosis
Oligohydramnios
Oligohydrosis
Oligomenorrhea
Oligophrenia
See Also: Disability, intellectual;
Oligospermia
Oligotrichia
See: Alopecia;
Oliguria
Ollier's disease
Omentitis
See: Peritonitis;
Omentocele
Omentum, omental
Omphalitis (congenital) (newborn)
Omphalocele
Omphalomesenteric duct, persistent
Omphalorrhagia, newborn
Omsk hemorrhagic fever
Onanism (excessive)
Onchocerciasis, onchocercosis
Oncocytoma
Oncovirus, as cause of disease classified elsewhere
Ondine's curse
See: Apnea, sleep;
Oneirophrenia
Onychauxis
Onychia
See Also: Cellulitis, digit;
Onychitis
See Also: Cellulitis, digit;
Onychocryptosis
Onychodystrophy
Onychogryphosis, onychogryposis
Onycholysis
Onychomadesis
Onychomalacia
Onychomycosis (finger) (toe)
Onycho-osteodysplasia
Onychophagia
Onychophosis
Onychoptosis
Onychorrhexis
Onychoschizia
Onyxis (finger) (toe)
Onyxitis
See Also: Cellulitis, digit;
Oophoritis (cystic) (infectional) (interstitial)
Oophorocele
Opacity, opacities
Opalescent dentin (hereditary)
Open, opening
Operational fatigue
Operative
Operculitis
See: Periodontitis;
Operculum
See: Break, retina;
Ophiasis
Ophthalmia
See Also: Conjunctivitis;
Ophthalmitis
Ophthalmocele (congenital)
Ophthalmoneuromyelitis
Ophthalmoplegia
See Also: Strabismus, paralytic;
Opioid (s)
Opisthognathism
Opisthorchiasis (felineus) (viverrini)
Opitz' disease
Opiumism
See: Dependence, drug, opioid;
Oppenheim's disease
Oppenheim-Urbach disease (necrobiosis lipoidica diabeticorum)
See: E08-E13 with .620;
Optic nerve
Orbit
Orchioblastoma
Orchitis (gangrenous) (nonspecific) (septic) (suppurative)
Orf (virus disease)
Organic
Orgasm
Oriental
Orifice
Origin of both great vessels from right ventricle
Ormond's disease (with ureteral obstruction)
Ornithine metabolism disorder
Ornithinemia (Type I) (Type II)
Ornithosis
Orotaciduria, oroticaciduria (congenital) (hereditary) (pyrimidine deficiency)
Orthodontics
Orthopnea
Orthopoxvirus
Os, uterus
Osgood-Schlatter disease or osteochondrosis
Osler (-Weber)-Rendu disease
Osler's nodes
Osmidrosis
Osseous
Ossification
Osteitis
See Also: Osteomyelitis;
Osteoarthritis
Osteoarthropathy (hypertrophic)
Osteoarthrosis (degenerative) (hypertrophic) (joint)
Osteoblastoma
See: Neoplasm, bone, benign;
Osteochondritis
See Also: Osteochondropathy, by site;
Osteochondroarthrosis deformans endemica
See: Disease, Kaschin-Beck;
Osteochondrodysplasia
Osteochondrodystrophy
Osteochondrolysis
Osteochondroma
See: Neoplasm, bone, benign;
Osteochondromatosis
Osteochondromyxosarcoma
Osteochondropathy
Osteochondrosarcoma
Osteochondrosis
See Also: Osteochondropathy, by site;
Osteoclastoma
Osteodynia
Osteodystrophy
Osteofibroma
See: Neoplasm, bone, benign;
Osteofibrosarcoma
Osteogenesis imperfecta
Osteogenic
Osteolysis
Osteoma
See Also: Neoplasm, bone, benign;
Osteomalacia
Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
Osteomyelofibrosis
Osteomyelosclerosis
Osteonecrosis
Osteo-onycho-arthro-dysplasia
Osteo-onychodysplasia, hereditary
Osteopathia condensans disseminata
Osteopathy
See Also: Osteomyelitis, Osteonecrosis, Osteoporosis;
Osteopenia
Osteoperiostitis
Osteopetrosis (familial)
Osteophyte
Osteopoikilosis
Osteoporosis (female) (male)
Osteopsathyrosis (idiopathica)
Osteoradionecrosis, jaw (acute) (chronic) (lower) (suppurative) (upper)
Osteosarcoma (any form)
Osteosclerosis
Osteosclerotic anemia
Osteosis
Ostium
Ostrum-Furst syndrome
Otalgia
Otitis (acute)
Otocephaly
Otolith syndrome
Otomycosis (diffuse) NEC
Otoporosis
See: Otosclerosis;
Otorrhagia (nontraumatic)
Otorrhea
Otosclerosis (general)
Otospongiosis
See: Otosclerosis;
Otto's disease or pelvis
Outcome of delivery
Outlet
Ovalocytosis (congenital) (hereditary)
See: Elliptocytosis;
Ovarian
Ovariocele
Ovaritis (cystic)
See: Oophoritis;
Ovary, ovarian
Overactive
Overactivity
Overbite (deep) (excessive) (horizontal) (vertical)
Overbreathing
See: Hyperventilation;
Overconscientious personality
Overdevelopment
See: Hypertrophy;
Overdistension
See: Distension;
Overdose, overdosage (drug)
Overeating
Overexertion (effects) (exhaustion)
Overexposure (effects)
Overfeeding
Overfill, endodontic
Overgrowth
Overhanging of dental restorative material (unrepairable)
Overheated (places) (effects)
See: Heat;
Overjet (excessive horizontal)
Overlaid, overlying (suffocation)
Overlap, excessive horizontal (teeth)
Overlapping toe (acquired)
See Also: Deformity, toe, specified NEC;
Overload
Overnutrition
Overproduction
Overprotection, child by parent
Overriding
Overstrained
Overuse, muscle NEC
Overweight
Overworked
Oviduct
Ovotestis
Ovulation (cycle)
Ovum
Owren's disease or syndrome (parahemophilia)
Ox heart
See: Hypertrophy, cardiac;
Oxalosis
Oxaluria
Oxycephaly, oxycephalic
Oxyuriasis
Oxyuris vermicularis (infestation)
Ozena
