Theophylline (Aminophylline)
| Specimen | Serum | 
| Container Type | Red/Black Tube 
 | 
| Transport Temp | Refrigerate 2° – 8° C | 
| Stability | 7 days | 
| Report Available | 1-2 days | 
| Reference Range | See patient report | 
| Instructions | Collect as a trough just prior to next dose. | 
| Performing Lab | Quest Nichols Institute – San Juan Capistrano, CA 92675 Reference Lab Test Code: 878 | 
| CPT Code | 80198 | 

