Overlaid, overlying (suffocation)  994.7 | 
  Overlap  | 
   | 
  Overlapping toe (acquired)  735.8 | 
   | 
  Overload  | 
   | 
  Overnutrition (see also Hyperalimentation)  783.6 | 
  Overproduction - see also Hypersecretion  | 
   | 
  Overriding  | 
   | 
  Oversize  | 
   | 
  Overstimulation, ovarian  256.1 | 
   | 
   | 
  Overweight (see also Obesity)  278.02 | 
   | 
  Oviduct - see condition  | 
   | 
  Ovulation (cycle)  | 
   | 
  Ovum  | 
   | 
  Owren's disease or syndrome (parahemophilia) (see also Defect, coagulation)  286.3 | 
   | 
   | 
  Ox heart - see Hypertrophy, cardiac  | 
   | 
  Oxycephaly, oxycephalic  756.0 | 
   | 
   | 
  Oxyuris vermicularis (infestation)  127.4 | 
   | 
   | 
  Pachyderma, pachydermia  701.8 | 
   | 
   | 
  Pachydermatocele (congenital)  757.39 | 
   | 
   | 
  Pachydermoperiostitis  | 
   | 
  Pachydermoperiostosis  | 
   | 
  Pachymeningitis (adhesive) (basal) (brain) (cerebral) (cervical) (chronic) (circumscribed) (external) (fibrous) (hemorrhagic) (hypertrophic) (internal) (purulent) (spinal) (suppurative) (see also Meningitis)  322.9 | 
   | 
  Pachyonychia (congenital)  757.5 | 
   | 
  Pachyperiosteodermia  | 
   | 
  Pachyperiostosis  | 
   | 
  Pacinian tumor (M9507/0) - see Neoplasm, skin, benign  | 
  Pads, knuckle or Garrod's  728.79 | 
  Paget's disease (osteitis deformans)  731.0 | 
   | 
  Paget-Schroetter syndrome (intermittent venous claudication)  453.8 | 
  Pain(s) (see also Painful)  780.96 | 
   | 
  Painful - see also Pain  | 
   | 
   | 
   | 
  Palate - see condition  | 
   | 
  Palatoschisis (see also Cleft, palate)  749.00 | 
   | 
  Palindromic arthritis (see also Rheumatism, palindromic)  719.3 | 
   | 
   | 
   | 
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