Definitions for "Diagnosis Code"
A code used for billing that describes your illness.
An ICD9-CM Diagnosis Code identifying a diagnosed medical condition resulting in a line item service.
The first of these codes is the ICD-9-CM diagnosis code describing the principal diagnosis (i.e. the condition established after study to be chiefly responsible for causing this hospitalization). The remaining codes are the ICD-9-CM diagnosis codes corresponding to additional conditions that coexisted at the time of admission, or developed subsequently, and which had an effect on the treatment received or the length of stay.