• Hydrencephalocele (congenital) 742.0
  • Hydrencephalomeningocele (congenital) 742.0
  • Hydroa 694.0
  • Hydroadenitis 705.83
  • 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
  • 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
  • Hydrometra 621.8
  • Hydrometrocolpos 623.8
  • Hydromicrocephaly 742.1
  • Hydromphalus (congenital) (since birth) 757.39
  • Hydromyelia 742.53
  • Hydromyelocele (see also Spina bifida) 741.9