Hairy cell leukemia
Hallux valgus
Hamstring injury
Hand osteoarthritis
Hand-foot-and-mouth disease
Hashimoto's thyroiditis
Head and neck squamous cell carcinoma of unknown primary
Heart failure
Heat-related illness
Helicobacter pylori infection
HELLP syndrome
Hemophagocytic lymphohistiocytosis
Hemorrhoids
Henoch-Schönlein purpura
Heparin-induced thrombocytopenia
Hepatic adenoma
Hepatic artery aneurysm
Hepatic cyst
Hepatic encephalopathy
Hepatic hemangioma
Hepatic hydrothorax
Hepatic veno-occlusive disease
Hepatitis A virus infection
Hepatitis B virus infection
Hepatitis C virus infection
Hepatitis D virus infection
Hepatitis E virus infection
Hepatocellular carcinoma
Hepatopulmonary syndrome
Hepatorenal syndrome
Hereditary angioedema
Hereditary hemochromatosis
Hereditary hemorrhagic telangiectasia
Herpes zoster
Hiatal hernia
Hidradenitis suppurativa
Hip fracture
Hip osteoarthritis
Hirschsprung disease
Hirsutism
Histoplasmosis
Hodgkin's lymphoma
Home oxygen
Hospital-acquired pneumonia
Human immunodeficiency virus infection
Human immunodeficiency virus-associated lymphomas
Human immunodeficiency virus-associated malignancies
Huntington's disease
Hydrocele
Hymenoptera sting allergy
Hypercalcemia of malignancy
Hypercapnic respiratory failure
Hyperkalemia
Hypernatremia
Hyperoxaluria
Hyperprolactinemia
Hypersensitivity pneumonitis
Hypersensitivity reactions to chemotherapy
Hypertension
Hypertension in pregnancy
Hyperthyroidism
Hypertriglyceridemia
Hypertrophic cardiomyopathy
Hypoglycemia
Hypokalemia
Hyponatremia
Hypoplastic left heart syndrome
Hypospadias
Hyposplenism and asplenia
Hypothyroidism
Hysteroscopy