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Table 1 Generating expert rules from an ICD-9-CM coding guide.

From: Automatic construction of rule-based ICD-9-CM coding systems

CODING GUIDE GENERATED EXPERT RULES
label 518.0 if document contains
 Pulmonary collapse pulmonary collapse OR
 Atelectasis atelectasis OR
 Collapse of lung collapse of lung OR
 Middle lobe syndrome middle lobe syndrome
 Excludes: AND document NOT contains
  atelectasis:  
   congenital (partial) (770.5) congenital atelectasis AND
   primary (770.4) primary atelectasis AND
   tuberculous, current disease (011.8) tuberculous atelectasis
  add label 518.0