Starting with 'O' (244) >

• Obermeyer's relapsing fever(European) A68.0
• Obesity E66.9
• Oblique - see condition
• Obliteration
• Observation(following) (for) (without need for further medical care) Z04.9
• Obsession, obsessional state F42
• Obsessive-compulsive neurosis or reaction F42
• Obstetric embolism, septic - see Embolism, obstetric, septic
• Obstetrical trauma(complicating delivery) O71.9
• Obstipation - see Constipation
• Obstruction, obstructed, obstructive
• Obturator - see condition
• Occlusal wear, teeth K03.0
• Occlusio pupillae - see Membrane, pupillary
• Occlusion, occluded
• Occult
• Occupational
• Ochlophobia - see Agoraphobia
• Ochronosis(endogenous) E70.29
• Ocular muscle - see condition
• Oculogyric crisis or disturbance H51.8
• Oculomotor syndrome H51.9
• Oculopathy
• Oddi's sphincter spasm K83.4
• Odontalgia K08.8
• Odontoameloblastoma - see Cyst, calcifying odontogenic
• Odontoclasia K03.89
• Odontodysplasia, regional K00.4
• Odontogenesis imperfecta K00.5
• Odontoma(ameloblastic) (complex) (compound) (fibroameloblastic) - see Cyst, calcifying odontogenic
• Odontomyelitis(closed) (open) K04.0
• Odontorrhagia K08.8
• Odontosarcoma, ameloblastic C41.1
• Oedema, oedematous - see Edema
• Oesophag(o)- - see Esophag(o)-
• Oestriasis - see Myiasis
• Oguchi's disease H53.63
• Ohara's disease - see Tularemia
• Oidiomycosis - see Candidiasis
• Oidium albicans infection - see Candidiasis
• Old age(without mention of debility) R54
• Old(previous) myocardial infarction I25.2
• Olfactory - see condition
• Oligemia - see Anemia
• Oligoastrocytoma
• Oligocythemia D64.9
• Oligodendroblastoma
• Oligodendroglioma
• Oligodontia - see Anodontia
• Oligoencephalon Q02
• Oligohidrosis L74.4
• Oligohydramnios O41.0-
• Oligohydrosis L74.4
• Oligomenorrhea N91.5
• Oligophrenia - see also Disability, intellectual
• Oligospermia N46.11
• Oligotrichia - see Alopecia
• Oliguria R34
• Ollier's disease Q78.4
• Omentitis - see Peritonitis
• Omenotocele - see Hernia, abdomen, specified site NEC
• Omentum, omental - see condition
• Omphalitis(congenital) (newborn) P38.9
• Omphalocele Q79.2
• Omphalomesenteric duct, persistent Q43.0
• Omphalorrhagia, newborn P51.9
• Omsk hemorrhagic fever A98.1
• Onanism(excessive) F98.8
• Onchocerciasis, onchocercosis B73.1
• Oncocytoma - see Neoplasm, benign, by site
• Oncovirus, as cause of disease classified elsewhere B97.32
• Ondine's curse - see Apnea, sleep
• Oneirophrenia F23
• Onychauxis L60.2
• Onychia - see also Cellulitis, digit
• Onychitis - see also Cellulitis, digit
• Onychocryptosis L60.0
• Onychodystrophy L60.3
• Onychogryphosis, onychogryposis L60.2
• Onycholysis L60.1
• Onychomadesis L60.8
• Onychomalacia L60.3
• Onychomycosis(finger) (toe) B35.1
• Onycho-osteodysplasia Q79.8
• Onychophagia F98.8
• Onychophosis L60.8
• Onychoptosis L60.8
• Onychorrhexis L60.3
• Onychoschizia L60.3
• Onyxis(finger) (toe) L60.0
• Onyxitis - see also Cellulitis, digit
• Oophoritis(cystic) (infectional) (interstitial) N70.92
• Oophorocele N83.4
• Opacity, opacities
• Opalescent dentin(hereditary) K00.5
• Open, opening
• Operational fatigue F48.8
• Operative - see condition
• Operculitis - see Periodontitis
• Operculum - see Break, retina
• Ophiasis L63.2
• Ophthalmia - see also Conjunctivitis H10.9
• Ophthalmitis - see Ophthalmia
• Ophthalmocele(congenital) Q15.8
• Ophthalmoneuromyelitis G36.0
• Ophthalmoplegia - see also Strabismus, paralytic
• Opioid(s)
• Opisthognathism M26.09
• Opisthorchiasis(felineus) (viverrini) B66.0
• Opiumism - see Dependence, drug, opioid
• Oppenheim's disease G70.2
• Oppenheim-Urbach disease(necrobiosis lipoidica diabeticorum) - see E08-E13 with .620
• Optic nerve - see condition
• Orbit - see condition
• Orchioblastoma C62.9-
• Orchitis(gangrenous) (nonspecific) (septic) (suppurative) N45.2
• Orf(virus disease) B08.02
• Organic - see also condition
• Orgasm
• Oriental
• Orifice - see condition
• Origin of both great vessels from right ventricle Q20.1
• Ormond's disease(with ureteral obstruction) N13.5
• Ornithine metabolism disorder E72.4
• Ornithinemia(Type I) (Type II) E72.4
• Ornithosis A70
• Orotaciduria, oroticaciduria(congenital) (hereditary) (pyrimidine deficiency) E79.8
• Orthodontics
• Orthopnea R06.01
• Orthopoxvirus B08.09
• Os, uterus - see condition
• Osgood-Schlatter disease or osteochondrosis - see Osteochondrosis, juvenile, tibia
• Osler(-Weber)-Rendu disease I78.0
• Osler's nodes I33.0
• Osmidrosis L75.0
• Osseous - see condition
• Ossification
• Osteitis - see also Osteomyelitis
• Osteoarthritis M19.90
• Osteoarthropathy(hypertrophic) M19.90
• Osteoarthrosis(degenerative) (hypertrophic) (joint) - see also Osteoarthritis
• Osteoblastoma - see Neoplasm, bone, benign
• Osteochondroarthrosis deformans endemica - see Disease, Kaschin-Beck
• Osteochondritis - see also Osteochondropathy, by site
• Osteochondrodysplasia Q78.9
• Osteochondrodystrophy E78.9
• Osteochondrolysis - see Osteochondritis, dissecans
• Osteochondroma - see Neoplasm, bone, benign
• Osteochondromatosis D48.0
• Osteochondromyxosarcoma - see Neoplasm, bone, malignant
• Osteochondropathy M93.90
• Osteochondrosarcoma - see Neoplasm, bone, malignant
• Osteochondrosis - see also Osteochondropathy, by site
• Osteoclastoma D48.0
• Osteodynia - see Disorder, bone, specified type NEC
• Osteodystrophy Q78.9
• Osteofibroma - see Neoplasm, bone, benign
• Osteofibrosarcoma - see Neoplasm, bone, malignant
• Osteogenesis imperfecta Q78.0
• Osteogenic - see condition
• Osteolysis M89.50
• Osteoma - see also Neoplasm, bone, benign
• Osteomalacia M83.9
• Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) M86.9
• Osteomyelofibrosis D75.89
• Osteomyelosclerosis D75.89
• Osteonecrosis M87.9
• Osteo-onycho-arthro-dysplasia Q79.8
• Osteo-onychodysplasia, hereditary Q79.8
• Osteopathia condensans disseminata Q78.8
• Osteopathy - see also Osteomyelitis, Osteonecrosis, Osteoporosis
• Osteopenia M85.8-
• Osteoperiostitis - see Osteomyelitis, specified type NEC
• Osteopetrosis(familial) Q78.2
• Osteophyte M25.70
• Osteopoikilosis Q78.8
• 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
• Osteosclerosis Q78.2
• Osteosclerotic anemia D64.89
• Osteosis
• Ostium
• Ostrum-Furst syndrome Q75.8
• Otalgia
• Otitis(acute) H66.90
• Otocephaly Q18.2
• Otolith syndrome
• Otomycosis(diffuse) NEC B36.9
• Otoporosis - see Otosclerosis
• Otorrhagia(nontraumatic) H92.2-
• Otorrhea H92.1-
• Otosclerosis(general) H80.9-
• Otospongiosis - see Otosclerosis
• Otto's disease or pelvis M24.7
• Outcome of delivery Z37.9
• Outlet - see condition
• Ovalocytosis(congenital) (hereditary) - see Elliptocytosis
• Ovarian - see Condition
• Ovariocele N83.4
• Ovaritis(cystic) - see Oophoritis
• Ovary, ovarian - see also condition
• Overactive - see also Hyperfunction
• Overactivity R46.3
• Overbite(deep) (excessive) (horizontal) (vertical) M26.29
• Overbreathing - see Hyperventilation
• Overconscientious personality F60.5
• Overdevelopment - see Hypertrophy
• Overdistension - see Distension
• Overdose, overdosage(drug) - see Table of drugs and chemicals, by drug, poisoning
• Overeating R63.2
• Overexertion(effects) (exhaustion) T73.3
• Overexposure(effects) T73.9
• Overfeeding - see Overeating
• Overfill, endodontic M27.52
• Overgrowth, bone - see 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
• Overnutrition - see Hyperalimentation
• Overproduction - see also Hypersecretion
• Overprotection, child by parent Z62.1
• Overriding
• Overstrained R53.83
• Overuse, muscle NEC M70.8-
• Overweight E66.3
• Overworked R53.83
• Oviduct - see condition
• Ovotestis Q56.0
• Ovulation(cycle)
• Ovum - see condition
• Owren's disease or syndrome(parahemophilia) D68.2
• Ox heart - see Hypertrophy, cardiac
• Oxalosis E72.53
• Oxaluria E72.53
• Oxycephaly, oxycephalic Q75.0
• Oxyuriasis B80
• Oxyuris vermicularis(infestation) B80
• Ozena J31.0