1. Three-digit code that represents a single disease or a group of closely related conditions in the diagnostic code book titled International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) . 2. Letter with two digits that represents a single disease or a group of closely related conditions in the diagnostic code book titled International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM). Also referred to as three-character category.

Procedure codes in the Current Procedural Terminology (CPT) code book that end with the letter “T.” They are temporary codes for emerging technology, services, and procedures and must be used instead of a Category I unlisted code.

Proof required by law in some states to show that the facts misrepresented in an insurance application were related to the loss insured against.

In a workers’ compensation case, an alleged physical, chemical, or biological factor that contributed to the incidence or happening of a medical condition.

Acronym for computer-assisted video keratography. See corneal topography.

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).

Abbreviation for Correct Coding Initiative. See Correct Coding Initiative (CCI) , also known as National Correct Coding Initiative (NCCI).