| Word | Description |
| CCN | Claim Control Number |
| Claim Memo | Memo that was created for a specific claim. |
| CLIA | CLIA - Clinical Laboratory Improvement Amendments A federally mandated set of certification criteria and data collection monitoring system designed to ensure the proper certification of clinical laboratories |
| CMS | Centers for Medicare and Medicaid Services The Federal agency that oversees the Medicare and Medicaid programs. |