1. Abbreviation for comorbid condition. See comorbid condition (CC). 2. Abbreviation for complications and comorbidities. See complications and comorbidities (CC). 3. HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating the insurance carrier changed the procedure code because an incorrect code was billed or because of an administrative reason. 4. Abbreviation for chief complaint. See chief complaint (CC). 5. Abbreviation for condition category. See condition category (CC). 6. Abbreviation for condition code. See condition code (CC).