Petit's  | 
   | 
  Petit mal (idiopathic) (see also Epilepsy)  345.0 | 
   | 
   | 
   | 
   | 
  Peutz-Jeghers disease or syndrome  759.6 | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
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  Phagedena (dry) (moist) (see also Gangrene)  785.4 | 
   | 
  Phagedenic - see also condition  | 
   | 
   | 
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  Phantom limb (syndrome)  353.6 | 
  Pharyngeal - see also condition  | 
   | 
  Pharyngitis (acute) (catarrhal) (gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (simple) (staphylococcal) (subacute) (suppurative) (ulcerative) (viral)  462 | 
   | 
  Pharyngoconjunctival fever  077.2 | 
  Pharyngoconjunctivitis, viral  077.2 | 
  Pharyngolaryngitis (acute)  465.0 | 
   | 
   | 
  Pharyngotonsillitis  465.8 | 
   | 
  Pharyngotracheitis (acute)  465.8 | 
   | 
  Pharynx, pharyngeal - see condition  | 
  Phase of life problem NEC  V62.89 | 
  Phenomenon  | 
   | 
  Phenylketonuria (PKU)  270.1 | 
  Phenylpyruvicaciduria  270.1 | 
  Pheochromoblastoma (M8700/3)  | 
   | 
  Pheochromocytoma (M8700/0)  | 
   | 
  Phimosis (congenital)  605 | 
   | 
  Phlebectasia (see also Varicose, vein)  454.9 | 
   | 
  Phlebitis (infective) (pyemic) (septic) (suppurative)  451.9 | 
   | 
   | 
   | 
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  Phlebothrombosis - see Thrombosis  | 
   | 
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  Phlegmasia  | 
   | 
  Phlegmon (see also Abscess)  682.9 | 
   | 
  Phlegmonous - see condition  | 
  Phlyctenulosis (allergic) (keratoconjunctivitis) (nontuberculous)  370.31 | 
   | 
  Phobia, phobic (reaction)  300.20 | 
   | 
   | 
   | 
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  Phoria (see also Heterophoria)  378.40 | 
  Phosphate-losing tubular disorder  588.0 | 
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