Aspartate Aminotransferase (AST)
Tube Type
| Test ID |
LAB131 |
| EPIC Order |
AST |
| CPT Code(s) |
84450 |
| Group/Individual Test |
Individual |
| Laboratory |
Core Laboratory |
| Tube Station |
Routine 30; STAT 888 |
| Specimen |
Routine: |
1 mL blood/green lithium heparin gel tube. Also acceptable gold SST, orange SST or red plain tube |
| Micro: |
200 µL blood/mint green top bullet/gold top/red top |
Stability
|
| Unspun: |
≤4 hours recommended. |
Spun/Separated,
Room Temp: |
≤3 days |
Spun/Separated,
Refrigerated: |
≤7 days |
| Frozen: |
30 days |
| Availability |
24 hours/day |
| Turnaround Time |
STAT 1 hr., Routine 2 hrs. |
| Reference Range |
Normal: |
AST (U/L) |
| Age |
Female (U/L) |
Male (U/L) |
| 0-15 days |
32-162 |
32-162 |
| 15 days - <1 year |
20-67 |
20-67 |
| 1 - <7 years |
21-44 |
21-44 |
| 7 - <12 years |
18-36 |
18-36 |
| 12 - <19 years |
13-26 |
14-35 |
| >19 years |
<34 |
<34 |
| For unknown, unspecified or transgender patients, both male and female reference ranges will be reported with the following comment: "Sex-specific reference interval. Interpret in the context of patient's hormone profile." |
| Comments |
Reference ranges effective July 13, 2021. |
Reviewed by J. Carr on January 10, 2026
