- Macacus ear, Q17.3
- Maceration, wet feet, tropical (syndrome), T69.02-
- MacLeod\’s syndrome, J43.0
- Macrocephalia, macrocephaly, Q75.3
- Macrocheilia, macrochilia (congenital), Q18.6
- Macrocolon, Q43.1
- Macrocornea, Q15.8
- Macrocytic
- Macrocytosis, D75.89
- Macrodactylia, macrodactylism (fingers) (thumbs), Q74.0
- Macrodontia, K00.2
- Macrogenia, M26.05
- Macrogenitosomia (adrenal) (male) (praecox), E25.9
- Macroglobulinemia (idiopathic) (primary), C88.0
- Macroglossia (congenital), Q38.2
- Macrognathia, macrognathism (congenital) (mandibular) (maxillary), M26.09
- Macrogyria (congenital), Q04.8
- Macrohydrocephalus
- Macromastia
- Macrophthalmos, Q11.3
- Macropsia, H53.15
- Macrosigmoid, K59.39
- Macrospondylitis , acromegalic, E22.0
- Macrostomia (congenital), Q18.4
- Macrotia (external ear) (congenital), Q17.1
- Macula
- Maculae ceruleae –, B85.1
- Maculopathy, toxic
- Madarosis (eyelid), H02.729
- Madelung\’s
- Madness
- Madura
- Maduromycosis, B47.0
- Maffucci\’s syndrome, Q78.4
- Magnesium metabolism disorder
- Main en griffe (acquired)
- Maintenance (encounter for)
- Majocchi\’s
- Major
- Mal de los pintos
- Mal de mer, T75.3
- Malabar itch (any site), B35.5
- Malabsorption, K90.9
- Malacia, bone (adult), M83.9
- Malacoplakia
- Malacosteon, juvenile
- Maladaptation
- Maladie de Roger, Q21.0
- Maladjustment
- Malaise, R53.81
- Malakoplakia
- Malaria, malarial (fever), B54
- Malassez\’s disease (cystic), N50.89
- Malassimilation, K90.9
- Maldescent, testis, Q53.9
- Maldevelopment
- Male type pelvis, Q74.2
- Malformation (congenital)
- Malfunction
- Malherbe\’s tumor
- Malibu disease, L98.8
- Malignancy
- Malignant
- Malingerer, malingering, Z76.5
- Mallet finger (acquired)
- Malleus, A24.0
- Mallory-Weiss syndrome, K22.6
- Mallory\’s bodies, R89.7
- Malnutrition, E46
- Malocclusion (teeth), M26.4
- Malposition
- Malposture, R29.3
- Malrotation
- Malta fever
- Maltreatment
- Maltworker\’s lung, J67.4
- Malunion, fracture
- Mammillitis, N61.0
- Mammitis
- Mammogram (examination), Z12.39
- Mammoplasia, N62
- Management (of)
- Mangled
- Mania (monopolar)
- Manic depression, F31.9
- Manic-depressive insanity, psychosis, or syndrome
- Mannosidosis, E77.1
- Mansonelliasis, mansonellosis, B74.4
- Manson\’s
- Manual
- Maple-bark-stripper\’s lung (disease), J67.6
- Maple-syrup-urine disease, E71.0
- Marable\’s syndrome (celiac artery compression), I77.4
- Marasmus, E41
- Marble
- Marburg virus disease, A98.3
- March
- Marchesani syndrome (-Weill), Q87.0
- Marchiafava syndrome or disease (-Bignami), G37.1
- Marchiafava-Micheli syndrome, D59.5
- Marcus Gunn\’s syndrome, Q07.8
- Marfan\’s syndrome
- Marie-Bamberger disease
- Marie-Charcot-Tooth neuropathic muscular atrophy, G60.0
- Marie-Strümpell arthritis, disease or spondylitis
- Marie\’s
- Marion\’s disease (bladder neck obstruction), N32.0
- Marital conflict, Z63.0
- Mark
- Marker heterochromatin
- Maroteaux-Lamy syndrome (mild) (severe), E76.29
- Marrow (bone)
- Marseilles fever, A77.1
- Marsh fever
- Marshall\’s ectodermal dysplasia (hidrotic), Q82.4
- Marsh\’s disease (exophthalmic goiter), E05.00
- Masculinization with adrenal hyperplasia (female), E25.9
- Masculinovoblastoma, D27.-
- Masochism (sexual), F65.51
- Mason\’s lung, J62.8
- Mass
- Massive
- Mast cell
- Mastalgia, N64.4
- Masters-Allen syndrome, N83.8
- Mastitis (acute) (diffuse) (nonpuerperal) (subacute), N61.0
- Mastocytoma (extracutaneous), D47.09
- Mastocytosis, D47.09
- Mastodynia, N64.4
- Mastoid
- Mastoidalgia
- Mastoiditis (coalescent) (hemorrhagic) (suppurative), H70.9-
- Mastopathy, mastopathia, N64.9
- Mastoplasia, mastoplastia, N62
- Masturbation (excessive), F98.8
- Maternal care (for)
- Matheiu\’s disease (leptospiral jaundice), A27.0
- Mauclaire\’s disease or osteochondrosis
- Maxcy\’s disease, A75.2
- Maxilla, maxillary
- May anomaly or syndrome (-Hegglin), D72.0
- Ménétrier\’s disease or syndrome, K29.60
- Ménière\’s disease, syndrome or vertigo, H81.0-
- Mönckeberg\’s arteriosclerosis, disease, or sclerosis
- Müllerian mixed tumor
- Münchhausen\’s syndrome
- Münchmeyer\’s syndrome
- McArdle (-Schmid)(-Pearson) disease (glycogen storage), E74.04
- McCune-Albright syndrome, Q78.1
- McQuarrie\’s syndrome (idiopathic familial hypoglycemia), E16.2
- ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome), G93.32
- Meadow\’s syndrome, Q86.1
- Measles (black) (hemorrhagic) (suppressed), B05.9
- Meat-wrappers\’ asthma, J68.9
- Meatitis, urethral
- Meatus, meatal
- Meckel-Gruber syndrome, Q61.9
- Meckel\’s diverticulitis, diverticulum (displaced) (hypertrophic), Q43.0
- Meconium
- Median
- Mediastinal shift, R93.89
- Mediastinitis (acute) (chronic), J98.51
- Mediastinopericarditis
- Mediastinum, mediastinal
- Medicine poisoning
- Mediterranean
- Medulla
- Medullary cystic kidney, Q61.5
- Medullated fibers
- Medulloblastoma
- Medulloepithelioma
- Medullomyoblastoma
- Meekeren-Ehlers-Danlos syndrome, Q79.69
- Megacolon (acquired) (functional) (not Hirschsprung\’s disease) (in), K59.39
- Megaesophagus (functional), K22.0
- Megalencephaly, Q04.5
- Megalerythema (epidemic), B08.3
- Megaloappendix, Q43.8
- Megalocephalus, megalocephaly NEC, Q75.3
- Megalocornea, Q15.8
- Megalocytic anemia, D53.1
- Megalodactylia (fingers) (thumbs) (congenital), Q74.0
- Megaloduodenum, Q43.8
- Megaloesophagus (functional), K22.0
- Megalogastria (acquired), K31.89
- Megalophthalmos, Q11.3
- Megalopsia, H53.15
- Megalosplenia
- Megaloureter, N28.82
- Megarectum, K62.89
- Megasigmoid, K59.39
- Megaureter, N28.82
- Megavitamin-B6 syndrome, E67.2
- Megrim
- Meibomian
- Meibomitis
- Meige-Milroy disease (chronic hereditary edema), Q82.0
- Meige\’s syndrome, Q82.0
- Melalgia, nutritional, E53.8
- Melancholia, F32.A
- Melanemia, R79.89
- Melanoameloblastoma
- Melanoblastoma
- Melanocarcinoma
- Melanocytoma, eyeball, D31.9-
- Melanocytosis, neurocutaneous, Q82.8
- Melanoderma, melanodermia, L81.4
- Melanodontia, infantile, K03.89
- Melanodontoclasia, K03.89
- Melanoepithelioma
- Melanoma (malignant), C43.9
- Melanosarcoma
- Melanosis, L81.4
- Melanuria, R82.998
- MELAS syndrome, E88.41
- Melasma, L81.1
- Melena, K92.1
- Meleney\’s
- Melioidosis, A24.9
- Melitensis, febris, A23.0
- Melkersson syndrome (-Rosenthal), G51.2
- Mellitus, diabetes
- Melorheostosis (bone)
- Meloschisis, Q18.4
- Melotia, Q17.4
- Membrana
- Membranacea placenta, O43.19-
- Membranaceous uterus, N85.8
- Membrane, membranous (s)
- Membranitis
- Memory disturbance, lack or loss
- Menadione deficiency, E56.1
- Menarche
- Mendacity, pathologic, F60.2
- Mendelson\’s syndrome (due to anesthesia), J95.4
- Meninges, meningeal
- Meningioma
- Meningiomatosis (diffuse)
- Meningism
- Meningismus (infectional) (pneumococcal), R29.1
- Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic), G03.9
- Meningocele (spinal)
- Meningocerebritis
- Meningococcemia, A39.4
- Meningococcus, meningococcal, A39.9
- Meningoencephalitis, G04.90
- Meningoencephalocele
- Meningoencephalomyelitis
- Meningoencephalomyelopathy, G96.9
- Meningoencephalopathy, G96.9
- Meningomyelitis
- Meningomyelocele
- Meningomyeloneuritis
- Meningoradiculitis
- Meningovascular
- Menkes\’ disease or syndrome, E83.09
- Menometrorrhagia, N92.1
- Menopause, menopausal (asymptomatic) (state), Z78.0
- Menorrhagia (primary), N92.0
- Menostaxis, N92.0
- Menses, retention, N94.89
- Menstrual
- Menstruation
- Mental
- Meralgia paresthetica, G57.1-
- Mercurial
- Mercurialism
- Merkel cell tumor
- Merocele
- Meromelia
- MERRF syndrome (myoclonic epilepsy associated with ragged-red fiber), E88.42
- Merzbacher-Pelizaeus disease, E75.29
- Mesaortitis
- Mesarteritis
- Mesencephalitis
- Mesenchymoma
- Mesenteritis
- Mesentery, mesenteric
- Mesio-occlusion, M26.213
- Mesiodens, mesiodentes, K00.1
- Mesocolon
- Mesonephroma (malignant)
- Mesophlebitis
- Mesostromal dysgenesia, Q13.89
- Mesothelioma (malignant), C45.9
- Metabolic syndrome, E88.81
- Metagonimiasis, B66.8
- Metagonimus infestation (intestine), B66.8
- Metal
- Metamorphopsia, H53.15
- Metaplasia
- Metastasis, metastatic
- Metastrongyliasis, B83.8
- Metatarsalgia, M77.4-
- Metatarsus, metatarsal
- Methadone use
- Methemoglobinemia, D74.9
- Methemoglobinuria
- Methioninemia, E72.19
- Methylmalonic acidemia, E71.120
- Metritis (catarrhal) (hemorrhagic) (septic) (suppurative)
- Metropathia hemorrhagica, N93.8
- Metroperitonitis
- Metrorrhagia, N92.1
- Metrorrhexis
- Metrosalpingitis, N70.91
- Metrostaxis, N93.8
- Metrovaginitis
- Meyer-Schwickerath and Weyers syndrome, Q87.0
- Meynert\’s amentia (nonalcoholic), F04
- Mibelli\’s disease (porokeratosis), Q82.8
- Mice, joint
- Micrencephalon, micrencephaly, Q02
- Microalbuminuria, R80.9
- Microaneurysm, retinal
- Microangiopathy (peripheral), I73.9
- Microcalcifications, breast, R92.0
- Microcephalus, microcephalic, microcephaly, Q02
- Microcheilia, Q18.7
- Microcolon (congenital), Q43.8
- Microcornea (congenital), Q13.4
- Microcytic
- Microdeletions NEC, Q93.88
- Microdontia, K00.2
- Microdrepanocytosis, D57.40
- Microembolism
- Microencephalon, Q02
- Microfilaria streptocerca infestation
- Microgastria (congenital), Q40.2
- Microgenia, M26.06
- Microgenitalia, congenital
- Microglioma
- Microglossia (congenital), Q38.3
- Micrognathia, micrognathism (congenital) (mandibular) (maxillary), M26.09
- Microgyria (congenital), Q04.3
- Microinfarct of heart
- Microlentia (congenital), Q12.8
- Microlithiasis, alveolar, pulmonary, J84.02
- Micromastia, N64.82
- Micromyelia (congenital), Q06.8
- Micropenis, Q55.62
- Microphakia (congenital), Q12.8
- Microphthalmos, microphthalmia (congenital), Q11.2
- Micropsia, H53.15
- Microscopic polyangiitis (polyarteritis), M31.7
- Microsporidiosis, B60.8
- Microsporon furfur infestation, B36.0
- Microsporosis
- Microstomia (congenital), Q18.5
- Microtia (congenital) (external ear), Q17.2
- Microtropia, H50.40
- Microvillus inclusion disease (MVD) (MVID), Q43.8
- Micturition
- Mid plane
- Middle
- Miescher\’s elastoma, L87.2
- Mietens\’ syndrome, Q87.2
- Migraine (idiopathic), G43.909
- Migrant, social, Z59.00
- Migration, anxiety concerning, Z60.3
- Migratory, migrating
- Mikity-Wilson disease or syndrome, P27.0
- Mikulicz\’ disease or syndrome, K11.8
- Miliaria, L74.3
- Miliary
- Milium, L72.0
- Milk
- Milk-alkali disease or syndrome, E83.52
- Milk-leg (deep vessels) (nonpuerperal)
- Milkman\’s disease or syndrome, M83.8
- Milky urine
- Millard-Gubler paralysis or syndrome (-Foville), G46.3
- Millar\’s asthma, J38.5
- Miller Fisher syndrome, G61.0
- Millstone maker\’s pneumoconiosis, J62.8
- Mills\’ disease
- Milroy\’s disease (chronic hereditary edema), Q82.0
- Minamata disease, T56.1
- Miners\’ asthma or lung, J60
- Minkowski-Chauffard syndrome
- Minor
- Minor\’s disease (hematomyelia), G95.19
- Minot-von Willebrand-Jurgens disease or syndrome (angiohemophilia)
- Minot\’s disease, newborn (hemorrhagic disease), P53
- Minus (and plus) hand (intrinsic)
- Miosis (pupil), H57.03
- Mirizzi\’s syndrome (hepatic duct stenosis), K83.1
- Mirror writing, F81.0
- MIS-A, M35.81
- MIS-C, M35.81
- Misadventure (of) (prophylactic) (therapeutic), T88.9
- Miscarriage, O03.9
- Misdirection, aqueous, H40.83-
- Misperception, sleep state, F51.02
- Misplaced, misplacement
- Missed
- Missing
- Misuse of drugs, F19.99
- Mitchell\’s disease (erythromelalgia), I73.81
- Mite (s) (infestation), B88.9
- Mitral
- Mittelschmerz, N94.0
- Mixed
- MMN (multifocal motor neuropathy), G61.82
- MNGIE syndrome (Mitochondrial Neurogastrointestinal Encephalopathy), E88.49
- Mobile, mobility
- Mobitz heart block (atrioventricular), I44.1
- Moebius, Möbius
- Moeller\’s glossitis, K14.0
- Mohr\’s syndrome (Types I and II), Q87.0
- Mola destruens, D39.2
- Molar pregnancy, O02.0
- Molarization of premolars, K00.2
- Molding, head – omit code (during birth)
- Mole (pigmented)
- Molimen, molimina (menstrual), N94.3
- Molluscum contagiosum (epitheliale), B08.1
- Mondini\’s malformation (cochlea), Q16.5
- Mondor\’s disease, I80.8
- Monge\’s disease, T70.29
- Monilethrix (congenital), Q84.1
- Moniliasis, B37.9
- Monitoring (encounter for)
- Monkey malaria, B53.1
- Monkeypox, B04
- Monoarthritis, M13.10
- Monoblastic
- Monochromat (ism), monochromatopsia (acquired) (congenital), H53.51
- Monocytic
- Monocytopenia, D72.818
- Monocytosis (symptomatic), D72.821
- Monomania
- Mononeuritis, G58.9
- Mononeuropathy, G58.9
- Mononucleosis, infectious, B27.90
- Monoplegia, G83.3-
- Monorchism, monorchidism, Q55.0
- Monosomy, Q93.9
- Monster, monstrosity (single), Q89.7
- Monteggia\’s fracture (-dislocation), S52.27-
- Mooren\’s ulcer (cornea)
- Moore\’s syndrome
- Mooser-Neill reaction, A75.2
- Mooser\’s bodies, A75.2
- Morbidity not stated or unknown, R69
- Morbilli
- Morbus
- Morel syndrome (-Stewart)(-Morgagni), M85.2
- Morel-Kraepelin disease
- Morel-Moore syndrome, M85.2
- Morgagni-Stewart-Morel syndrome, M85.2
- Morgagni-Stokes-Adams syndrome, I45.9
- Morgagni-Turner syndrome (-Albright), Q96.9
- Morgagni\’s
- Moria, F07.0
- Moron (I.Q.50-69), F70
- Morphea, L94.0
- Morphinism (without remission), F11.20
- Morphinomania (without remission), F11.20
- Morquio disease or syndrome (-Ullrich)(-Brailsford)
- Mortification (dry) (moist)
- Morton\’s metatarsalgia (neuralgia)(neuroma) (syndrome), G57.6-
- Morvan\’s disease or syndrome, G60.8
- Mosaicism, mosaic (autosomal) (chromosomal)
- Moschowitz\’ disease, M31.19
- Mother yaw, A66.0
- Motion sickness (from travel, any vehicle) (from roundabouts or swings), T75.3
- Mottled, mottling, teeth (enamel) (endemic) (nonendemic), K00.3
- Mounier-Kuhn syndrome, Q32.4
- Mountain
- Mouse, joint
- Mouth
- Movable
- Movements, dystonic, R25.8
- Moyamoya disease, I67.5
- MRSA (Methicillin resistant Staphylococcus aureus)
- MSD (multiple sulfatase deficiency), E75.26
- MSSA (Methicillin susceptible Staphylococcus aureus)
- Mucha-Habermann disease, L41.0
- Mucinosis (cutaneous) (focal) (papular) (reticular erythematous) (skin), L98.5
- Mucocele
- Mucolipidosis
- Mucopolysaccharidosis, E76.3
- Mucormycosis, B46.5
- Mucositis (ulcerative), K12.30
- Mucositis necroticans agranulocytica
- Mucous
- Mucoviscidosis, E84.9
- Mucus
- Muguet, B37.0
- Mulberry molars (congenital syphilis), A50.52
- Multicystic kidney (development), Q61.4
- Multiparity (grand), Z64.1
- Multipartita placenta, O43.19-
- Multiple, multiplex
- Multisystem inflammatory syndrome (in adult) (in children), M35.81
- Mumps, B26.9
- Mumu, B74.9
- Mural
- Murmur (cardiac) (heart) (organic), R01.1
- Murri\’s disease (intermittent hemoglobinuria), D59.6
- Muscle, muscular
- Musculoneuralgia
- Mushroom-workers\’ disease or lung (pickers\’), J67.5
- Mushrooming hip
- Mutation (s)
- Mutism
- MVD (microvillus inclusion disease), Q43.8
- MVID (microvillus inclusion disease), Q43.8
- Myalgia, M79.10
- Myasthenia, G70.9
- Myasthenic, M62.81
- Mycelium infection, B49
- Mycetismus
- Mycetoma, B47.9
- Mycobacteriosis
- Mycobacterium, mycobacterial (infection), A31.9
- Mycoplasma pneumoniae, as cause of disease classified elsewhere (M.), B96.0
- Mycosis, mycotic, B49
- Mydriasis (pupil), H57.04
- Myelatelia, Q06.1
- Myelinolysis, pontine, central, G37.2
- Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute), G04.91
- Myelo-osteo-musculodysplasia hereditaria, Q79.8
- Myeloblastic
- Myeloblastoma
- Myelocele
- Myelocystocele
- Myelocytic
- Myelodysplasia, D46.9
- Myelodysplastic syndrome, D46.9
- Myeloencephalitis
- Myelofibrosis, D75.81
- Myelogenous
- Myeloid
- Myelokathexis, D70.9
- Myeloleukodystrophy, E75.29
- Myelolipoma
- Myeloma (multiple), C90.0-
- Myelomalacia, G95.89
- Myelomatosis, C90.0-
- Myelomeningitis
- Myelomeningocele (spinal cord)
- Myelopathic
- Myelopathy (spinal cord), G95.9
- Myelophthisis, D61.82
- Myeloradiculitis, G04.91
- Myeloradiculodysplasia (spinal), Q06.1
- Myelosarcoma, C92.3-
- Myelosclerosis, D75.89
- Myelosis
- Myiasis (cavernous), B87.9
- Myoadenoma, prostate
- Myoblastoma
- Myocardial
- Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic), I42.9
- Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile), I51.4
- Myocardium, myocardial
- Myocardosis
- Myoclonus, myoclonic, myoclonia (familial) (essential) (multifocal) (simplex), G25.3
- Myocytolysis, I51.5
- Myodiastasis
- Myoendocarditis
- Myoepithelioma
- Myofasciitis (acute)
- Myofibroma
- Myofibromatosis, D48.1
- Myofibrosis, M62.89
- Myofibrositis, M79.7
- Myoglobulinuria, myoglobinuria (primary), R82.1
- Myokymia, facial, G51.4
- Myolipoma
- Myoma
- Myomalacia, M62.89
- Myometritis
- Myometrium
- Myonecrosis, clostridial, A48.0
- Myopathy, G72.9
- Myopericarditis
- Myopia (axial) (congenital), H52.1-
- Myosarcoma
- Myosis (pupil), H57.03
- Myositis, M60.9
- Myospasia impulsiva, F95.2
- Myotonia (acquisita) (intermittens), M62.89
- Myotonic pupil
- Myriapodiasis, B88.2
- Myringitis, H73.2-
- Mysophobia, F40.228
- Mytilotoxism
- Myxadenitis labialis, K13.0
- Myxedema (adult) (idiocy) (infantile) (juvenile), E03.9
- Myxochondrosarcoma
- Myxofibroma
- Myxofibrosarcoma
- Myxolipoma, D17.9
- Myxoliposarcoma
- Myxoma
- Myxosarcoma