- Kahler\’s disease, C90.0-
- Kakke, E51.11
- Kala-azar, B55.0
- Kallmann\’s syndrome, E23.0
- Kanner\’s syndrome (autism)
- Kaposi\’s
- Kartagener\’s syndrome or triad (sinusitis, bronchiectasis, situs inversus), Q89.3
- Karyotype
- Kaschin-Beck disease
- Katayama\’s disease or fever, B65.2
- Kawasaki\’s syndrome, M30.3
- Kayser-Fleischer ring (cornea) (pseudosclerosis), H18.04-
- Kaznelson\’s syndrome (congenital hypoplastic anemia), D61.01
- Köebner\’s syndrome, Q81.8
- Köenig\’s disease (osteochondritis dissecans)
- Köhler-Pellegrini-Steida disease or syndrome (calcification, knee joint)
- Köhler\’s disease
- Kümmell\’s disease or spondylitis
- Kearns-Sayre syndrome, H49.81-
- Kedani fever, A75.3
- Kelis, L91.0
- Kelly (-Patterson) syndrome (sideropenic dysphagia), D50.1
- Keloid, cheloid, L91.0
- Keloma, L91.0
- Kenya fever, A77.1
- Keratectasia
- Keratinization of alveolar ridge mucosa
- Keratinized residual ridge mucosa
- Keratitis (nodular) (nonulcerative) (simple) (zonular), H16.9
- Kerato-uveitis
- Keratoacanthoma, L85.8
- Keratocele
- Keratoconjunctivitis, H16.20-
- Keratoconus, H18.60-
- Keratocyst (dental) (odontogenic)
- Keratoderma, keratodermia (congenital) (palmaris et plantaris) (symmetrical), Q82.8
- Keratodermatocele
- Keratoglobus, H18.79
- Keratohemia
- Keratoiritis
- Keratoma, L57.0
- Keratomalacia, H18.44-
- Keratomegaly, Q13.4
- Keratomycosis, B49
- Keratopathy, H18.9
- Keratoscleritis, tuberculous, A18.52
- Keratosis, L57.0
- Kerion (celsi), B35.0
- Kernicterus of newborn (not due to isoimmunization), P57.9
- Kerunoparalysis, T75.09
- Keshan disease, E59
- Ketoacidosis, E87.29
- Ketonuria, R82.4
- Ketosis NEC, E88.89
- Kew Garden fever, A79.1
- Kidney
- Kienböck\’s disease
- Kimmelstiel disease (-Wilson)
- Kimura disease, D21.9
- Kink, kinking
- Kinnier Wilson\’s disease (hepatolenticular degeneration), E83.01
- Kissing spine, M48.20
- Klatskin\’s tumor, C24.0
- Klauder\’s disease, A26.8
- Klebsiella pneumoniae, as cause of disease classified elsewhere (K.), B96.1
- Klebs\’ disease, N05.-
- Klein-Levin syndrome (e), G47.13
- Kleptomania, F63.2
- Klinefelter\’s syndrome, Q98.4
- Klippel-Feil deficiency, disease, or syndrome (brevicollis), Q76.1
- Klippel-Trenaunay syndrome (-Weber), Q87.2
- Klippel\’s disease, I67.2
- Klumpke (-Déjerine) palsy, paralysis (birth) (newborn), P14.1
- Knee
- Knock knee (acquired), M21.06-
- Knot (s)
- Knotting (of)
- Knuckle pad (Garrod\’s), M72.1
- Koch-Weeks\’ conjunctivitis
- Koch\’s
- Koilonychia, L60.3
- Kojevnikov\’s, epilepsy
- Koplik\’s spots, B05.9
- Kopp\’s asthma, E32.8
- Korsakoff\’s (Wernicke) disease, psychosis or syndrome (alcoholic), F10.96
- Korsakov\’s disease, psychosis or syndrome
- Korsakow\’s disease, psychosis or syndrome
- Kostmann\’s disease or syndrome (infantile genetic agranulocytosis)
- Kozhevnikof\’s epilepsy, G40.109
- Krabbe\’s
- Kraepelin-Morel disease
- Kraft-Weber-Dimitri disease, Q85.89
- Kraurosis
- Kreotoxism, A05.9
- Krukenberg\’s
- Kufs\’ disease, E75.4
- Kugelberg-Welander disease, G12.1
- Kuhnt-Junius degeneration, H35.32-
- Kupffer cell sarcoma, C22.3
- Kuru, A81.81
- Kussmaul\’s
- Kwashiorkor, E40
- Kyasanur Forest disease, A98.2
- Kyphoscoliosis, kyphoscoliotic (acquired), M41.9
- Kyphosis, kyphotic (acquired), M40.209
- Kyrle disease, L87.0