| Nonhealing | 
  |  | 
  | Nonimplantation of ovum, causing infertility 628.3 | 
  | Noninsufflation, fallopian tube 628.2 | 
  | Nonne-Milroy-Meige syndrome (chronic hereditary edema) 757.0 | 
  |  | 
  | Nonpatent fallopian tube 628.2 | 
  | Nonpneumatization, lung NEC 770.4 | 
  |  | 
  |  | 
  | Nonretention of food - see Vomiting | 
  | Nonrotation - see Malrotation | 
  | Nonsecretion, urine (see also Anuria) 788.5 | 
  |  | 
  | Nonunion | 
  |  | 
  |  | 
  | Nonvisualization, gallbladder 793.3 | 
  |  | 
  | Non-working side interference 524.56 | 
  | Normal | 
  |  | 
  |  | 
  | Normocytic anemia (infectional) 285.9 | 
  |  | 
  | Norrie's disease (congenital) (progressive oculoacousticocerebral degeneration) 743.8 | 
  | North American blastomycosis 116.0 | 
  |  | 
  | Nose, nasal - see condition | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Notched lip, congenital (see also Cleft, lip) 749.10 | 
  | Notching nose, congenital (tip) 748.1 | 
  | Nothnagel's | 
  |  | 
  | Novy's relapsing fever (American) 087.1 | 
  | Noxious | 
  |  | 
  | NPDH (new persistent daily headache) 339.42 | 
  |  | 
  | Nucleus pulposus - see condition | 
  |  | 
  |  | 
  | Nursemaid's | 
  |  | 
  |  | 
  | Nutrition, deficient or insufficient (particular kind of food) 269.9 | 
  |  | 
  | Nyctalopia (see also Blindness, night) 368.60 | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Oasthouse urine disease 270.2 | 
  | Obermeyer's relapsing fever (European) 087.0 | 
  | Obesity (constitutional) (exogenous) (familial) (nutritional) (simple) 278.00 | 
  |  | 
  | Oblique - see also condition | 
  |  | 
  |  | 
|  |  |