| COI | Central Obesity Index; certificate of insurance; cost of illness |
|---|---|
| CSI | calculus surface index; cancer serum index; cavernous sinus infiltration; cervical spine injury; che... |
| HIP | health illness profile; health insurance plan or program; homograft incus prosthesis; hospital insur... |
| HOPI | history of present illness |
| HPI | hepatic perfusion index; history of present illness |