- Oak IgE
- Oat, IgE, Serum (Oat, IgE)
- Occult Blood, FIT, stool (RBC Stool, Blood Stool, Fecal Occult Blood, FIT, Fecal Immunochemical Test, Colon Cancer Screen)
- OCT2
- OCT3/4
-
Oil Red O (
Bronchoalveolar Lavage for Lipid-Laden Macrophages, BAL, lung fluid, lipid pneumonia
) - Olive Tree IgE
- Onion, IgE, Serum (Onion, IgE)
-
Oral cavity (
Mouth, tongue
) - Orange, IgE, Serum (Orange, IgE)
- Orchard Grass, IgE, Serum (Orchard Grass, IgE)
- Osmolality, Random, Urine (Osmolality, Urine)
- Osmolality, Serum (Osmolality)
- Ova and Parasite, Concentrate and Permanent Smear, Microscopy, Feces (Ova and Parasite, Microscopy)
-
Ovary, cyst (
Ovarian cyst
) - Oyster, IgE, Serum (Oyster, IgE)
