Oasthouse urine disease 270.2

Obermeyer's relapsing fever (European) 087.0

Obliquity, pelvis 738.6

Obturator - see condition

Occlusio pupillae 364.74

Ochlophobia 300.29

Oculoauriculovertebral dysplasia 756.0

Oculomotor syndrome 378.81

Oddi's sphincter spasm 576.5

Odelberg's disease (juvenile osteochondrosis) 732.1

Odontalgia 525.9

Odontoclasia 521.05

Odontodysplasia, regional 520.4

Odontogenesis imperfecta 520.5

Odontomyelitis (closed) (open) 522.0

Odontonecrosis 521.09

Odontorrhagia 525.8

Odynophagia 787.20

Oesophagostomiasis 127.7

Oesophagostomum infestation 127.7

Oestriasis 134.0

Ogilvie's syndrome (sympathicotonic colon obstruction) 560.89

Oguchi's disease (retina) 368.61

Ohara's disease (see also Tularemia) 021.9

Oidiomycosis (see also Candidiasis) 112.9

Oidiomycotic meningitis 112.83

Oidium albicans infection (see also Candidiasis) 112.9

Olfactory - see condition

Oligemia 285.9

Oligergasia (see also Disability, intellectual) 319

Oligocythemia 285.9

Oligodendroma - see Oligodendroglioma

Oligodontia (see also Anodontia) 520.0

Oligoencephalon 742.1

Oligohydrosis 705.0

Oligomenorrhea 626.1

Oligospermia 606.1

Ollier's disease (chondrodysplasia) 756.4

Omentitis (see also Peritonitis) 567.9

Omentocele (see also Hernia, omental) 553.8

Omentum, omental - see condition

Omphalocele 756.72

Omphalomesenteric duct, persistent 751.0

Omphalorrhagia, newborn 772.3

Omsk hemorrhagic fever 065.1

Onanism 307.9

Onchocercosis 125.3

Oncocytoma (M8290/0) - see Neoplasm, by site, benign

Ondine's curse 348.89

Oneirophrenia (see also Schizophrenia) 295.4

Onychocryptosis 703.0

Onychogryphosis 703.8

Onychogryposis 703.8

Onycholysis 703.8

Onychomadesis 703.8

Onychomalacia 703.8

Onycho-osteodysplasia 756.89

Onychophagy 307.9

Onychoptosis 703.8

Onychoschizia 703.8

Onychotrophia (see also Atrophy, nail) 703.8

O'Nyong Nyong fever 066.3

Onyxis (finger) (toe) 703.0

Opalescent dentin (hereditary) 520.5

Operational fatigue 300.89

Operative - see condition

Ophiasis 704.01

Ophthalmitis - see Ophthalmia

Ophthalmocele (congenital) 743.66

Ophthalmoneuromyelitis 341.0

Ophthalmopathy, infiltrative with thyrotoxicosis 242.0

Opisthognathism 524.00

Opisthorchiasis (felineus) (tenuicollis) (viverrini) 121.0

Opisthotonos, opisthotonus 781.0

Opitz's disease (congestive splenomegaly) 289.51

Opiumism (see also Dependence) 304.0

Oppenheim's disease 358.8

Opsoclonia 379.59

Optic nerve - see condition

Orbit - see condition

Orchioblastoma (M9071/3) 186.9

Orf 051.2

Orifice - see condition

Origin, both great vessels from right ventricle 745.11

Ormond's disease or syndrome 593.4

Orodigitofacial dysostosis 759.89

Oropouche fever 066.3

Orotaciduria, oroticaciduria (congenital) (hereditary) (pyrimidine deficiency) 281.4

Oroya fever 088.0

Orthopnea 786.02

Os, uterus - see condition

Osler-Rendu disease (familial hemorrhagic telangiectasia) 448.0

Osler-Vaquez disease (M9950/1) (polycythemia vera) 238.4

Osler-Weber-Rendu syndrome (familial hemorrhagic telangiectasia) 448.0

Osmidrosis 705.89

Osseous - see condition

Osteoarthritica spondylitis (spine) (see also Spondylosis) 721.90

Osteoblastoma (M9200/0) - see Neoplasm, bone, benign

Osteochondrodermodysplasia 756.59

Osteochondrolysis 732.7

Osteochondromyxosarcoma (M9180/3) - see Neoplasm, bone, malignant

Osteochondropathy NEC 732.9

Osteochondrosarcoma (M9180/3) - see Neoplasm, bone, malignant

Osteocopic pain 733.90

Osteodynia 733.90

Osteofibroma (M9262/0) - see Neoplasm, bone, benign

Osteofibrosarcoma (M9182/3) - see Neoplasm, bone, malignant

Osteogenesis imperfecta 756.51

Osteogenic - see condition

Osteomalacic bone 268.2

Osteomalacosis 268.2

Osteomyelofibrosis 289.89

Osteomyelosclerosis 289.89

Osteo-onycho-arthro dysplasia 756.89

Osteo-onychodysplasia, hereditary 756.89

Osteopecilia 756.53

Osteopetrosis (familial) 756.52

Osteophyte - see Exostosis

Osteophytosis - see Exostosis

Osteopoikilosis 756.53

Osteoporosis-osteomalacia syndrome 268.2

Osteopsathyrosis 756.51

Osteoradionecrosis, jaw 526.89

Osteosclerotic anemia 289.89

Österreicher-Turner syndrome 756.89

Ostrum-Furst syndrome 756.59

Othematoma 380.31

Otitic hydrocephalus 348.2

Otoconia 386.8

Otolith syndrome 386.19

Otopathy 388.9

Otoporosis (see also Otosclerosis) 387.9

Otospongiosis (see also Otosclerosis) 387.9

Otto's disease or pelvis 715.35

Outstanding ears (bilateral) 744.29

Ovalocytosis (congenital) (hereditary) (see also Elliptocytosis) 282.1

Ovaritis (cystic) (see also Salpingo-oophoritis) 614.2

Ovary, ovarian - see condition

Overactivity, child 314.01

Overbite (deep) (excessive) (horizontal) (vertical) 524.29

Overbreathing (see also Hyperventilation) 786.01

Overconscientious personality 301.4

Overdistention - see Distention

Overexertion (effects) (exhaustion) 994.5

Overfeeding (see also Overeating) 783.6

Overfill, endodontic 526.62

Overgrowth, bone NEC 733.99

Overheated (effects) (places) - see Heat

Overinhibited child 313.0

Overlaid, overlying (suffocation) 994.7

Overnutrition (see also Hyperalimentation) 783.6

Overstimulation, ovarian 256.1

Overweight (see also Obesity) 278.02

Overwork 780.79

Oviduct - see condition

Ovotestis 752.7

Owren's disease or syndrome (parahemophilia) (see also Defect, coagulation) 286.3

Oxalosis 271.8

Oxaluria 271.8

Ox heart - see Hypertrophy, cardiac

OX syndrome 758.6

Oxyuriasis 127.4

Oxyuris vermicularis (infestation) 127.4

Ozena 472.0