| Abbreviation | Definition |
|---|---|
| CIM | Clinical and Investigative Medicine |
| CIM | CpG island methylation |
| CIM | critical illness myopathy |
| CIM | Cumulated Index Medicus |
| CIMP | cardiac inhibitor of metalloproteinase |
| CIMP | Clinical Information Management Programme |
| CIMS | chemical ionisation mass spectrometry |
| CIMS | Coordinated Incident Management System (NZ) |
| CIN | Children In Need |
| CIP | Certified IRB Professional |
| CIP | Cost Improvement Plan |
| CIP | Cost Improvement Programme |
| CIPC | Centre for Innovation in Primary Care |
| CIPFA | Chartered Institute of Public Finance and Accountancy |
| CIS | cancer information service |
| CIS | carcinoma-in-situ |
| CIS | cisplatin |
| CIS | computerised information system |
| CISH | classic intrafascial supracervical hysterectomy |
| CISH | Confidential Inquiry into Suicide and Homicide (by people with mental illness) |