• Reduced ventilatory or vital capacity 794.2
  • Reduction
  • Redundant, redundancy
  • Reduplication - see Duplication
  • Referral
  • Reflex - see also condition
  • Reflux 530.81
  • Reformed gallbladder 576.0
  • Reforming, artificial openings (see also Attention to, artificial, opening) V55.9
  • Refractive error (see also Error, refractive) 367.9
  • Refsum's disease or syndrome (heredopathia atactica polyneuritiformis) 356.3
  • Refusal of
  • Regaud
  • Regional - see condition
  • Regulation feeding (elderly) (infant) 783.3
  • Regurgitated
  • Regurgitation 787.03
  • Rehabilitation V57.9
  • Reichmann's disease or syndrome (gastrosuccorrhea) 536.8
  • Reifenstein's syndrome (hereditary familial hypogonadism, male) 259.52
  • Reilly's syndrome or phenomenon (see also Neuropathy, peripheral, autonomic) 337.9
  • Reimann's periodic disease 277.31