| 101879-5 | Osmolality (Arterial Blood, calculated by sum of electrolytes) |
| 101880-3 | Osmolality (Venous Blood, calculated by sum of electrolytes) |
| 15200-9 | Osmolality (Body Fluid) |
| 1607-1 | Osmolality--12 hours post fluid fast (Urine) |
| 1608-9 | Osmolality--8 hours post fluid fast (Urine) |
| 17794-9 | Osmolality of Hyperal solution |
| 18182-6 | Osmolality (calculated by sum of electrolytes) |
| 2689-8 | Osmolality (Amniotic Fluid) |
| 2690-6 | Osmolality (Pleural Fluid) |
| 2691-4 | Osmolality (Peritoneal Fluid) |
| 2692-2 | Osmolality |
| 2693-0 | Osmolality (Stool) |
| 2694-8 | Osmolality of 24 hour Urine |
| 2695-5 | Osmolality (Urine) |
| 2696-3 | Osmolality of Specimen |
| 33264-3 | Osmol gap |
| 48148-1 | Osmolality (Urine, calculated by sum of electrolytes) |
| 49001-1 | Osmolality of Sweat |
| 55354-5 | Osmolality--4 hours post fluid fast (Urine) |
| 55355-2 | Osmolality--7 hours post fluid fast (Urine) |
| 55356-0 | Osmolality--5 hours post fluid fast (Urine) |
| 55357-8 | Osmolality--3 hours post fluid fast (Urine) |
| 55358-6 | Osmolality--2 hours post fluid fast (Urine) |
| 55359-4 | Osmolality--1 hour post fluid fast (Urine) |
| 55360-2 | Osmolality--6 hours post fluid fast (Urine) |
| 55361-0 | Osmolality--baseline (Urine) |
| 55960-9 | Osmolality of Dialysis fluid |
| 57372-5 | Osmolality of 12 hour Urine |
| 57731-2 | Osmolality--2nd specimen (Urine) |
| 57732-0 | Osmolality--3rd specimen (Urine) |
| 58852-5 | Osmolality--1.5 hours post fluid fast (Urine) |
| 58853-3 | Osmolality--30 minutes post fluid fast (Urine) |
| 73571-2 | Osmol gap (Stool) |
| 93990-0 | Osmolality--1 hour post fluid fast |
| 93991-8 | Osmolality--2 hours post fluid fast |
| 93992-6 | Osmolality--3 hours post fluid fast |
| 93993-4 | Osmolality--4 hours post fluid fast |
| 93994-2 | Osmolality--5 hours post fluid fast |
| 93995-9 | Osmolality--6 hours post fluid fast |
| 93996-7 | Osmolality--7 hours post fluid fast |
| 94004-9 | Osmolality--1 hour post dose vasopressin |
| 94005-6 | Osmolality--1 hour post dose vasopressin (Urine) |
| 94013-0 | Osmolality--2 hours post dose vasopressin |
| 94014-8 | Osmolality--2 hours post dose vasopressin (Urine) |
| 94843-0 | Osmolality from Fetus (Urine) |