| C&T WARD | Coma Ward - "cabbages And Turnips" | - | NASA |
| C/C | Cancel Christmas (dead) | - | NASA |
| C2 | A "can't C**t"; Lazy Physician Who Passes Off Work To Colleagues And Often Whines | - | NASA |
| CABG | Coronary Artery Bypass Graft (Cabbage) - Heart Bypass | - | NASA |
| CAT6 | Triage Is Cat 1 (major) To Cat 5 (minor) So Cat 6 Means A Timewaster | - | NASA |
| CATS | Cut All To Shit | - | NASA |
| CBT | Chronic Burger/Biscuit Toxicity (obesity) | - | NASA |
| CCFCCP | Coo-coo For Co-Co Puffs (dementia Or Similar) | - | NASA |
| CF | Cockroach Factor - A Patient's Ability To Survive Trauma Or Serious Treatment Is Inversely Proportional To His Contribution To Society. | - | NASA |
| CFD | Call For Dirt (severely Ill Or Dying) | - | NASA |
| CFT | Chronic Food Toxicity I.e. Obesity | - | NASA |
| CFU | Complete(ly) F*ck(ed) Up | - | NASA |
| CHAOS | Chronic Hurts All Over Syndrome (PTSD/Fibromyalgia, Etc.) | - | NASA |
| CHIBLOC | Closed Head Injury, Brief Loss Of Consciousness | - | NASA |
| CIA | Chrome Induced Ischaemia - Patient That Develops Inexplicable Chest Pains When Arrested And Handcuffed | - | NASA |
| CKS | Cute Kid Syndrome | - | NASA |
| CLL | Chronic Low Life | - | NASA |
| CLOMI | Cat Like Observation And Masterful Inactivity (patient Under Observation) | - | NASA |
| COPD | Chronic Old Persons Disease (unwell, No Specific Cause) | - | NASA |
| COSMONAUT | Cat Owner, Smells, Made Of Nuts And Used Tampons ("mad Cat Lady" With Poor Hygiene And Body Odour) | - | NASA |
| CPM | Calcified Penisitis Morbidium - Male Patient Whose Ailment Is Due To Excessive Or Unprotected Sex | - | NASA |
| CRAFT | Can't Remember A Fucking Thing | - | NASA |
| CRI | Cranial-Rectal Insertion Or Cranial-Rectal Inversion (head-up-ass Syndrome) | - | NASA |
| CROACC | Cannot Rule Out Anything, Correlate Clinically | - | NASA |
| CRS | Can't Remember Shit | - | NASA |
| CRT | Can't Really Treat | - | NASA |
| CSD | Chronic Slapping Deficiency - Annoying/unruly Family Members Hitting Nurse's Call Button Every 5 Minutes With Minor Requests/inane Questions Or For Fun | - | NASA |
| CTD | Circling The Drain (Close To Death) | - | NASA |
| CTF | Cletus The Fetus (US). A 23 Week, Or Earlier, Births That Parents Expect To Survive Against All Odds | - | NASA |
| CTS | Cold-tea Sign / Cold Tea Syndrome - Refers To The Several Cups Of Cold Tea On The Bedside Cabinet Beside A Dead Geriatric (i.e. No-one Noticed The Patient Had Died) | - | NASA |
| CTS | Crazier Than Shit | - | NASA |
| CYA | Cover Your Ass; Unnecessary Procedure/prescription Done To Avoid Being Sued | - | NASA |
