| IFOI | "I Fell On It" - (also Eiffel Syndrome) Universal Explanation Given By A Patient With A Foreign Object In The Rectum | - | NASA |
| IHC | Improving His Claim - Victim Of Minor Accident, Needs No Treatment But Wants Something To Support His Insurance/legal Claim. | - | NASA |
| IOTC | Icing On The Cake - Lethal Tumor Discovered In The X-rays Of A Heart Attack Victim. | - | NASA |
| IP | Insurance Pain - Neck Pain Secondary To A Minor Car Bump | - | NASA |
| ISQ | In Status Quo ("no Change"): Often Used During The Weekend Surgical Round | - | NASA |
| ITBNTL | In The Box, Nail The Lid (dead Or Dying) | - | NASA |
| IW | Insurance Whiplash - Neck Pain Secondary To A Minor Car Bump | - | NASA |
| IWB | Intercourse With Biscuits (F**king Crackers) | - | NASA |
