Hyalin plaque, sclera, senile  379.16 | 
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  Hydatid  | 
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  Hydatidiform mole (benign) (complicating pregnancy) (delivered) (undelivered)  630 | 
   | 
  Hydatidosis - see Echinococcus  | 
  Hyde's disease (prurigo nodularis)  698.3 | 
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  Hydradenoma (M8400/0) - see Hidradenoma  | 
  Hydralazine lupus or syndrome  | 
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   | 
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  Hydrarthrosis (see also Effusion, joint)  719.0 | 
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  Hydrencephalocele (congenital)  742.0 | 
  Hydrencephalomeningocele (congenital)  742.0 | 
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   | 
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  Hydrocalycosis (see also Hydronephrosis)  591 | 
   | 
  Hydrocalyx (see also Hydronephrosis)  591 | 
  Hydrocele (calcified) (chylous) (idiopathic) (infantile) (inguinal canal) (recurrent) (senile) (spermatic cord) (testis) (tunica vaginalis)  603.9 | 
   | 
  Hydrocephalic fetus  | 
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  Hydrocephalus (acquired) (external) (internal) (malignant) (noncommunicating) (obstructive) (recurrent)  331.4 | 
   | 
  Hydrocolpos (congenital)  623.8 | 
  Hydrocystoma (M8404/0) - see Neoplasm, skin, benign  | 
  Hydroencephalocele (congenital)  742.0 | 
  Hydroencephalomeningocele (congenital)  742.0 | 
  Hydrohematopneumothorax (see also Hemothorax)  511.89 | 
  Hydromeningitis - see Meningitis  | 
  Hydromeningocele (spinal) (see also Spina bifida)  741.9 | 
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  Hydromphalus (congenital) (since birth)  757.39 | 
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  Hydromyelocele (see also Spina bifida)  741.9 | 
   | 
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  Hydropericarditis (see also Pericarditis)  423.9 | 
  Hydropericardium (see also Pericarditis)  423.9 | 
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   | 
  Hydrophthalmos (see also Buphthalmia)  743.20 | 
  Hydropneumohemothorax (see also Hemothorax)  511.89 | 
  Hydropneumopericarditis (see also Pericarditis)  423.9 | 
  Hydropneumopericardium (see also Pericarditis)  423.9 | 
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  Hydropyonephrosis (see also Pyelitis)  590.80 | 
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