Convert to ICD-10-CM: 
511.1 converts approximately to:
- 2015/16 ICD-10-CM J90 Pleural effusion, not elsewhere classifiedOr: 
- 2015/16 ICD-10-CM J94.2 Hemothorax
 ICD-9-CM Volume 2 Index entries containing back-references to 
511.1:
- Effusion pleura, pleurisy, pleuritic, pleuropericardial 511.9 pleura, pleurisy, pleuritic, pleuropericardial 511.9   bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
  fetus or newborn 511.9 fetus or newborn 511.9 
  malignant 197.2 malignant 197.2 
  nontuberculous 511.9 nontuberculous 511.9 
  pneumococcal 511.1 pneumococcal 511.1
  staphylococcal 511.1 staphylococcal 511.1
  streptococcal 511.1 streptococcal 511.1
  traumatic 862.29 traumatic 862.29 
  tuberculous (see also Tuberculosis, pleura) 012.0 tuberculous (see also Tuberculosis, pleura) 012.0    primary progressive 010.1 primary progressive 010.1 
 
 
 
- Hemothorax 511.8  bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
  nontuberculous 511.8 nontuberculous 511.8   bacterial 511.1 bacterial 511.1
 
  pneumococcal 511.1 pneumococcal 511.1
  staphylococcal 511.1 staphylococcal 511.1
  streptococcal 511.1 streptococcal 511.1
 
- Hydropneumothorax 511.8  nontuberculous 511.8 nontuberculous 511.8   bacterial 511.1 bacterial 511.1
 
  pneumococcal 511.1 pneumococcal 511.1
  staphylococcal 511.1 staphylococcal 511.1
  streptococcal 511.1 streptococcal 511.1
 
- Hydrothorax (double) (pleural) 511.8  nontuberculous 511.8 nontuberculous 511.8   bacterial 511.1 bacterial 511.1
 
  pneumococcal 511.1 pneumococcal 511.1
  staphylococcal 511.1 staphylococcal 511.1
  streptococcal 511.1 streptococcal 511.1
 
- Pleurisy (acute) (adhesive) (chronic) (costal) (diaphragmatic) (double) (dry) (fetid) (fibrinous) (fibrous) (interlobar) (latent) (lung) (old) (plastic) (primary) (residual) (sicca) (sterile) (subacute) (unresolved) (with adherent pleura) 511.0  with with  effusion (without mention of cause) 511.9 effusion (without mention of cause) 511.9    bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
   nontuberculous NEC 511.9 nontuberculous NEC 511.9 
   pneumococcal 511.1 pneumococcal 511.1
   specified type NEC 511.8 specified type NEC 511.8 
   staphylococcal 511.1 staphylococcal 511.1
   streptococcal 511.1 streptococcal 511.1
   tuberculous (see also Tuberculosis, pleura) 012.0 tuberculous (see also Tuberculosis, pleura) 012.0     primary, progressive 010.1 primary, progressive 010.1 
 
 
  influenza, flu, or grippe 487.1 influenza, flu, or grippe 487.1 
  tuberculosis - see Pleurisy, tuberculous tuberculosis - see Pleurisy, tuberculous
 
  exudative (see also Pleurisy, with effusion) 511.9 exudative (see also Pleurisy, with effusion) 511.9   bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
 
  pneumococcal 511.0 pneumococcal 511.0   with effusion 511.1 with effusion 511.1
 
  serofibrinous (see also Pleurisy, with effusion) 511.9 serofibrinous (see also Pleurisy, with effusion) 511.9   bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
 
  serous (see also Pleurisy, with effusion) 511.9 serous (see also Pleurisy, with effusion) 511.9   bacterial, nontuberculous 511.1 bacterial, nontuberculous 511.1
 
  staphylococcal 511.0 staphylococcal 511.0   with effusion 511.1 with effusion 511.1
 
  streptococcal 511.0 streptococcal 511.0   with effusion 511.1 with effusion 511.1