| Rabbit Epithelium |
| Rabies Titer |
| Rapamycin |
| Rapid Parathyroid Hormone |
| Rast Antibodies |
| RBC Cholinesterase |
| RBC Folic Acid |
| RBC Fragility |
| Red Blood Count, Whole Blood |
| Renal Pelvis - Cytology |
| Renal Profile |
| Renin |
| Respiratory Allergy Profile, Region I w IgE |
| Respiratory Culture |
| Respiratory Culture (Cystic Fibrosis) |
| Respiratory Virus Panel by PCR |
| Retic Count |
| Retic Panel |
| Reticulin Antibodies |
| Rh Phenotype |
