- Lactate
- Lactate Dehydrogenase (LDH)
- LE Cells
- Lead
- Leishmaniadonovani
- Leptospira Antibody IgG
- Leptospira Antibody IgM
- Leptospira Detection
- Leptospira DNA PCR
- Lipase
- Lipoprotein a (Lp-a)
- Lithium (Li)
- Liver-Kidney Microsome (LKM)–1 Antibody
- Lupus AntiCoagulant
- Luteinising Hormone (LH)