| Test | Specimen Requirements |
| NAP (Neutrophil Alkaline Phosphatase) | 5-10 mL LITHIUM HEPARIN (green) |
| Neonatal Bilirubin (NBI) | Mini-plain tube or capillary tube collection |
| Neutrophil Cytoplasmic Antibody (ANCA) | 10 mL GEL (white / yellow). |
| Nickel (Ni)* | 50ml Random urine |
| Nitrazepam (Mogadon)* | 10 mL GEL (white / yellow). State time/date of last dose & time/date of collection. |
| Nortriptyline (Allergron)* | 10ml LITHIUM HEPARIN (green). Sample Time: Pre-Dose. State time / date of last dose & time / date of collection. |
| Nose Swab (Nasal) Culture & Sensitivity | Swab collected into gel transport medium. |
| NPC (EBV IgG VCA) | 10ml GEL (white / yellow) |