Convert to ICD-10-CM: 
537.3 converts approximately to:
- 2015/16 ICD-10-CM K31.5 Obstruction of duodenum
 ICD-9-CM Volume 2 Index entries containing back-references to 
537.3:
- Adhesion(s), adhesive (postinfectional) (postoperative) duodenum (see also Adhesions, peritoneum) 568.0 duodenum (see also Adhesions, peritoneum) 568.0   with obstruction 537.3 with obstruction 537.3
 
  peritoneum, peritoneal (fibrous) (postoperative) 568.0 peritoneum, peritoneal (fibrous) (postoperative) 568.0   with obstruction (intestinal) 560.81 with obstruction (intestinal) 560.81    with hernia - see also Hernia, by site, with obstruction with hernia - see also Hernia, by site, with obstruction    gangrenous - see Hernia, by site, with gangrene gangrenous - see Hernia, by site, with gangrene
 
   duodenum 537.3 duodenum 537.3
 
  congenital 751.4 congenital 751.4 
  female (postoperative) (postinfective) 614.6 female (postoperative) (postinfective) 614.6 
  pelvic, female 614.6 pelvic, female 614.6 
  pelvic, male 568.0 pelvic, male 568.0 
  postpartal, pelvic 614.6 postpartal, pelvic 614.6 
  to uterus 614.6 to uterus 614.6 
 
 
- Cicatrix (adherent) (contracted) (painful) (vicious) 709.2  duodenum (bulb) 537.3 duodenum (bulb) 537.3
 
- Compression duodenum (external) (see also Obstruction, duodenum) 537.3 duodenum (external) (see also Obstruction, duodenum) 537.3
 
- Congestion, congestive (chronic) (passive) duodenum 537.3 duodenum 537.3
 
- Constriction duodenum 537.3 duodenum 537.3
 
- Lesion(s) duodenum 537.89 duodenum 537.89   with obstruction 537.3 with obstruction 537.3
 
 
- Megaduodenum 537.3
- Obstruction, obstructed, obstructive duodenum 537.3 duodenum 537.3  congenital 751.1 congenital 751.1 
  due to due to   compression NEC 537.3 compression NEC 537.3
   cyst 537.3 cyst 537.3
   intrinsic lesion or disease NEC 537.3 intrinsic lesion or disease NEC 537.3
   scarring 537.3 scarring 537.3
   torsion 537.3 torsion 537.3
   ulcer 532.91 ulcer 532.91 
   volvulus 537.3 volvulus 537.3
 
 
 
- Scar, scarring (see also Cicatrix) 709.2  duodenal (bulb) (cap) 537.3 duodenal (bulb) (cap) 537.3
 
- Stenosis (cicatricial) - see also Stricture duodenum 537.3 duodenum 537.3
 
- Stricture (see also Stenosis) 799.89  duodenum 537.3 duodenum 537.3
 
- Torsion duodenum 537.3 duodenum 537.3
 
- Volvulus (bowel) (colon) (intestine) 560.2  duodenum 537.3 duodenum 537.3