- Hypopharyngitis 462
- Hypophoria 378.40
- Hypophosphatasia 275.3
- Hypophosphatemia (acquired) (congenital) (familial) 275.3
- Hypophyseal, hypophysis - see also condition
- Hypophyseothalamic syndrome 253.8
- Hypopiesis - see Hypotension
- Hypopigmentation 709.00
- Hypopinealism 259.8
- Hypopituitarism (juvenile) (syndrome) 253.2
- Hypoplasia, hypoplasis 759.89
- Hypopotassemia 276.8
- Hypoproaccelerinemia (see also Defect, coagulation) 286.3
- Hypoproconvertinemia (congenital) (see also Defect, coagulation) 286.3
- Hypoproteinemia (essential) (hypermetabolic) (idiopathic) 273.8
- Hypoproteinosis 260
- Hypoprothrombinemia (congenital) (hereditary) (idiopathic) (see also Defect, coagulation) 286.3
- Hypopselaphesia 782.0
- Hypopyon (anterior chamber) (eye) 364.05
- Hypopyrexia 780.99
- Hyporeflex 796.1
- Hyporeninemia, extreme 790.99