Convert to ICD-10-CM: 
600.21 converts approximately to:
- 2015/16 ICD-10-CM N40.1 Enlarged prostate with lower urinary tract symptoms
 ICD-9-CM Volume 2 Index entries containing back-references to 
600.21:
- Adenofibroma (M9013/0) prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Adenoma (sessile) (M8140/0) - see also Neoplasm, by site, benign prostate (benign) 600.20 prostate (benign) 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Adenomyoma (M8932/0) - see also Neoplasm, by site, benign prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Benign - see also condition prostate prostate  hyperplasia 600.20 hyperplasia 600.20 
  with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
  neoplasm 222.2 neoplasm 222.2 
 
 
- Fibroadenoma (M9010/0) prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Fibroma (M8810/0) - see also Neoplasm, connective tissue, benign prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Hyperplasia, hyperplastic prostate  600.90 prostate  600.90   with with   other lower urinary tract symptoms (LUTS) 600.91 other lower urinary tract symptoms (LUTS) 600.91 
   urinary urinary
 
  adenofibromatous 600.20 adenofibromatous 600.20    with with    other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
    urinary urinary     obstruction 600.21 obstruction 600.21
     retention 600.21 retention 600.21
 
 
 
  nodular 600.10 nodular 600.10 
 
 
- Hypertrophy, hypertrophic prostate (asymptomatic) (early) (recurrent) 600.90 prostate (asymptomatic) (early) (recurrent) 600.90   with with   other lower urinary tract symptoms (LUTS) 600.91 other lower urinary tract symptoms (LUTS) 600.91 
   urinary urinary
 
  adenofibromatous 600.20 adenofibromatous 600.20    with with    other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
    urinary urinary     obstruction 600.21 obstruction 600.21
     retention 600.21 retention 600.21
 
 
 
  benign 600.00 benign 600.00    with with    other lower urinary tract symptoms (LUTS) 600.01 other lower urinary tract symptoms (LUTS) 600.01 
    urinary urinary
 
 
  congenital 752.89 congenital 752.89 
 
 
- Leiomyoma (M8890/0) - see also Neoplasm, connective tissue, benign prostate (polypoid) 600.20 prostate (polypoid) 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Myoadenoma, prostate 600.20  with with  other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
  urinary urinary   obstruction 600.21 obstruction 600.21
   retention 600.21 retention 600.21
 
 
 
- Myoma (M8895/0) - see also Neoplasm, connective tissue, benign prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21
 
 
 
 
- Polyp, polypus prostate 600.20 prostate 600.20   with with   other lower urinary tract symptoms (LUTS) 600.21 other lower urinary tract symptoms (LUTS) 600.21
   urinary urinary    obstruction 600.21 obstruction 600.21
    retention 600.21 retention 600.21