Image: An arrow points from "ICD-9-CM Codes, DRGs on Administrative Data" to a compact disk with a caption of "Comorbidity Software"; three arrows point from "Comorbidity Software" to
"29 Comorbidity Classifications."
- The Comorbidity Software is based on the ICD-9-CM coding scheme.
- This software creates 29 variables that identify major comorbidities.
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