| Lvl | Code | Display | Definition |
| 1 | AC | AC | before meal (from lat. ante cibus) |
| 1 | ACD | ACD | before lunch (from lat. ante cibus diurnus) |
| 1 | ACM | ACM | before breakfast (from lat. ante cibus matutinus) |
| 1 | ACV | ACV | before dinner (from lat. ante cibus vespertinus) |
| 1 | C | C | Description: meal (from lat. ante cibus) |
| 2 | CD | CD | Description: lunch (from lat. cibus diurnus) |
| 2 | CM | CM | Description: breakfast (from lat. cibus matutinus) |
| 2 | CV | CV | Description: dinner (from lat. cibus vespertinus) |
| 1 | HS | HS | Description: Prior to beginning a regular period of extended sleep (this would exclude naps). Note that this might occur at different times of day depending on a person's regular sleep schedule. |
| 1 | IC | IC | between meals (from lat. inter cibus) |
| 1 | ICD | ICD | between lunch and dinner |
| 1 | ICM | ICM | between breakfast and lunch |
| 1 | ICV | ICV | between dinner and the hour of sleep |
| 1 | PC | PC | after meal (from lat. post cibus) |
| 1 | PCD | PCD | after lunch (from lat. post cibus diurnus) |
| 1 | PCM | PCM | after breakfast (from lat. post cibus matutinus) |
| 1 | PCV | PCV | after dinner (from lat. post cibus vespertinus) |
| 1 | WAKE | WAKE | Description: Upon waking up from a regular period of sleep, in order to start regular activities (this would exclude waking up from a nap or temporarily waking up during a period of sleep) Usage Notes: e.g. Take pulse rate on waking in management of thyrotoxicosis. Take BP on waking in management of hypertension Take basal body temperature on waking in establishing date of ovulation |
