ICD-10-CM
- Labioglossal paralysis
- Lacunar skull
- LAD (leukocyte adhesion deficiency) (LAD-I) (LAD-II) (LAD-III)
- Lalling
- Lambliasis, lambliosis
- Landouzy's disease (icterohemorrhagic leptospirosis)
- Landouzy-Déjérine dystrophy or facioscapulohumeral atrophy
- Landry's disease or paralysis
- Landry-Guillain-Barré, syndrome or paralysis
- Lapsed immunization schedule status
- Larsen's syndrome (flattened facies and multiple congenital dislocations)
- Laryngocele (congenital) (ventricular)
- Laryngomalacia (congenital)
- Laryngoptosis
- Laryngospasm
- Laryngostenosis
- Lassa fever
- Launois' syndrome (pituitary gigantism)
- Launois-Bensaude adenolipomatosis
- Laurence-Moon syndrome
- Laxative habit
- Lazy leukocyte syndrome
- LBSL (leukoencephalopathy with brainstem - spinal cord involvement - lactate elevation)
- Lead miner's lung
- Learning defect (specific)
- Leather bottle stomach
- Lederer's anemia
- Legg (-Calvé)-Perthes disease, syndrome or osteochondrosis
- Leigh's disease
- Leiner's disease
- Lenegre's disease
- Lenticonus (anterior) (posterior) (congenital)
- Lenticular degeneration, progressive
- Lentiglobus (posterior) (congenital)
- Lentivirus, as cause of disease classified elsewhere
- Lepothrix
- Leprechaunism
- Leptocytosis, hereditary
- Leptomeningopathy
- Leptus dermatitis
- Leri's pleonosteosis
- Leriche's syndrome (aortic bifurcation occlusion)
- Leri-Weill syndrome
- Lesch-Nyhan syndrome
- Less than a high school diploma
- Lethargy
- Letterer-Siwe's disease
- Leukoaraiosis (hypertensive)
- Leukocytopenia
- Leukoedema, oral epithelium
- Leukoerythroblastosis
- Leukokraurosis vulva (e)
- Leukomelanopathy, hereditary
- Leukosarcoma
- Lev's disease or syndrome (acquired complete heart block)
- Levotransposition
- Levurid
- Lewy body (ies) (disease)
- Liar, pathologic
- Libman-Sacks disease
- Lichenification
- Lichenoides tuberculosis (primary)
- Lichtheim's disease or syndrome
- Lien migrans
- Lightwood's disease or syndrome (renal tubular acidosis)
- Lightwood-Albright syndrome
- Ligneous thyroiditis
- Likoff's syndrome
- Limbic epilepsy personality syndrome
- Lindau (-von Hippel) disease
- Linguatulosis
- Linitis (gastric) plastica
- Lipochondrodystrophy
- Lipochrome histiocytosis (familial)
- Lipodystrophia progressiva
- Lipofuscinosis, neuronal (with ceroidosis)
- Lipogranuloma, sclerosing
- Lipogranulomatosis
- Lipoprotein metabolism disorder
- Liposynovitis prepatellaris
- Lipping, cervix
- Lipschütz disease or ulcer
- Lisping
- Lissauer's paralysis
- Lissencephalia, lissencephaly
- Lithemia
- Lithosis
- Lithuria
- Litigation, anxiety concerning
- Little's disease
- Livedo (annularis) (racemosa) (reticularis)
- Lives in a homeless encampment
- Living in a shelter (motel) (scattered site housing) (temporary or transitional living situation)
- Loa loa (loiasis)
- Lobo's disease
- Lobomycosis
- Lobotomy syndrome
- Lobstein (-Ekman) disease or syndrome
- Lobster-claw hand
- Locked-in state
- Locked twins causing obstructed labor
- Loiasis (with conjunctival infestation) (eyelid)
- Loneliness
- Lone Star fever
- Looser-Milkman (-Debray) syndrome
- Lop ear (deformity)
- Lorain (-Levi) short stature syndrome
- Louis-Bar syndrome (ataxia-telangiectasia)
- Louping ill (encephalitis)
- Low-density-lipoprotein-type (LDL) hyperlipoproteinemia
- Lowe's syndrome
- Lown-Ganong-Levine syndrome
- L-shaped kidney
- LTBI (latent tuberculosis infection)
- LTBL (leukoencephalopathy with thalamus - brainstem involvement - high lactate)
- Ludwig's angina or disease
- Luetscher's syndrome (dehydration)
- Lumbarization, vertebra, congenital
- Lumbermen's itch
- Lupoid (miliary) of Boeck
- Luteinoma
- Lutembacher's disease or syndrome (atrial septal defect with mitral stenosis)
- Luteoma
- Lycanthropy
- Lyme disease
- Lymphadenoid goiter
- Lymphadenosis
- Lymphangiectatic elephantiasis, nonfilarial
- Lymphangioleiomyomatosis
- Lymphangiomyoma
- Lymphangiomyomatosis
- Lymphatism
- Lymphectasia
- Lymphocele
- Lymphocytoma, benign cutis
- Lymphocytopenia
- Lymphohistiocytosis, hemophagocytic (familial)
- Lymphopathia venereum, veneris
- Lymphopenia
- Lymphoproliferation, X-linked disease
- Lymphoreticulosis, benign (of inoculation)
- Lymphorrhea
- Lymphostasis
- Lysine and hydroxylysine metabolism disorder