| 
  Hyposomnia, unspecified (see also Insomnia)  780.52 | 
   | 
   | 
   | 
  Hypospermatogenesis  606.1 | 
   | 
   | 
  Hypostasis, pulmonary  514 | 
  Hypostatic - see condition  | 
   | 
   | 
   | 
  Hypotension (arterial) (constitutional)  458.9 | 
   | 
  Hypothermia (accidental)  991.6 | 
   | 
  Hypothymergasia (see also Psychosis, affective)  296.2 | 
   | 
  Hypothyroidism (acquired)  244.9 | 
   | 
  Hypotonia, hypotonicity, hypotony  781.3 | 
   | 
   | 
   | 
   | 
   | 
   | 
  Hypovitaminosis (see also Deficiency, vitamin)  269.2 | 
   | 
   | 
  Hypoxemia (see also Anoxia)  799.02 | 
   | 
  Hypoxia (see also Anoxia)  799.02 | 
   | 
  Hypoxic-ischemic encephalopathy (HIE)  768.7 | 
  Hypsarrhythmia (see also Epilepsy)  345.6 | 
  Hysteralgia, pregnant uterus  646.8 | 
   | 
   | 
   | 
  Hysterotomy, affecting fetus or newborn  763.89 | 
  Iatrogenic syndrome of excess cortisol  255.0 | 
  Iceland disease (epidemic neuromyasthenia)  049.8 | 
  Ichthyosis (congenita)  757.1 | 
   | 
   | 
   | 
  Icteroanemia, hemolytic (acquired)  283.9 | 
   | 
  Icterus (see also Jaundice)  782.4 | 
   | 
  Ictus solaris, solis  992.0 | 
   | 
   | 
   | 
  Idiopathic - see condition  | 
  Idiosyncrasy (see also Allergy)  995.3 | 
   | 
  Idiot, idiocy (congenital)  318.2 | 
   | 
  Id reaction (due to bacteria)  692.89 | 
  Ideation  | 
   | 
  IEED (involuntary emotional expression disorder)  310.8 | 
  IFIS (intraoperative floppy iris syndrome)  364.81 | 
   | 
  Ileitis (chronic) (see also Enteritis)  558.9 | 
   | 
  Ileocolitis (see also Enteritis)  558.9 | 
   | 
   | 
   | 
   | 
 |  |