| Large granular lymphocytes | LP15193-3 | 2 |
| Large granular lymphocytes | Blood | Hematology and Cell counts | LP392991-8 | 2 |
| Large unstained cells | LP19258-0 | 2 |
| Large unstained cells | Blood | Hematology and Cell counts | LP392877-9 | 2 |
| Lathosterol | LP185931-5 | 2 |
| Lathosterol | Serum or Plasma | Chemistry - non-challenge | LP382491-1 | 2 |
| Laurate (C12:0) | LP33058-6 | 2 |
| Lauroleate (C12:1) | LP33059-4 | 2 |
| Lecithin | LP15697-3 | 2 |
| Lecithin | Amniotic fluid | Chemistry - non-challenge | LP382352-5 | 2 |
| Leucine | Serum or Plasma | Chemistry - non-challenge | LP384103-0 | 2 |
| Leucine crystals | Urine sediment | Urinalysis | LP402406-5 | 2 |
| Leukocyte clumps | Urine | Urinalysis | LP402503-9 | 2 |
| Leukocyte clumps | Urine sediment | Urinalysis | LP402504-7 | 2 |
| Leukocyte esterase | LP15701-3 | 2 |
| Leukocyte esterase | Urine | Urinalysis | LP402530-2 | 2 |
| Leukocytes | Stool | Hematology and Cell counts | LP392618-7 | 2 |
| Leukocytes | Vaginal | Hematology and Cell counts | LP392621-1 | 2 |
| Leukocytes other | Body fluid | Hematology and Cell counts | LP392884-5 | 2 |
| Leukocytes other | Cerebral spinal fluid | Hematology and Cell counts | LP392885-2 | 2 |
| Leukocytes other | Peritoneal fluid | Hematology and Cell counts | LP392887-8 | 2 |
| Leukocytes other | Pleural fluid | Hematology and Cell counts | LP392888-6 | 2 |
| Leukocytes other | Synovial fluid | Hematology and Cell counts | LP392889-4 | 2 |
| Leukocytes other | Vitreous fluid | Hematology and Cell counts | LP392890-2 | 2 |
| Leukotriene E4 | LP30837-6 | 2 |
| Leukotriene E4 | Urine | Chemistry - non-challenge | LP382194-1 | 2 |
| Linoleate (C18:2w6) | LP15702-1 | 2 |
| Linoleoylcarnitine (C18:2) | LP19327-3 | 2 |
| Lipoprotein a | LP14886-3 | 2 |
| Lipoprotein a | Serum or Plasma | Chemistry - non-challenge | LP382529-8 | 2 |
| Lipoprotein.pre-beta | Serum or Plasma | Chemistry - non-challenge | LP382540-5 | 2 |
| Lithium | LP16175-9 | 2 |
| Lithium | Serum or Plasma | Drug toxicology | LP390984-5 | 2 |
| Liver cancer antibodies and AFP panel | LP268298-9 | 2 |
| Liver fibrosis score | Serum or Plasma | Chemistry - non-challenge | LP385333-2 | 2 |
| Lymphoblasts | LP31546-2 | 2 |
| Lymphoblasts | Blood | Hematology and Cell counts | LP392942-1 | 2 |
| Lymphocytes | Blood cord | Hematology and Cell counts | LP392920-7 | 2 |
| Lymphocytes | Body fluid | Hematology and Cell counts | LP392921-5 | 2 |
| Lymphocytes | Cerebral spinal fluid | Hematology and Cell counts | LP392922-3 | 2 |
| Lymphocytes | Peritoneal fluid | Hematology and Cell counts | LP392924-9 | 2 |
| Lymphocytes | Pleural fluid | Hematology and Cell counts | LP392925-6 | 2 |
| Lymphocytes | Synovial fluid | Hematology and Cell counts | LP392928-0 | 2 |
| Lymphocytes | Vitreous fluid | Hematology and Cell counts | LP392930-6 | 2 |
| Lymphocytes Plasmacytoid | LP31548-8 | 2 |
| Lymphocytes Plasmacytoid | Blood | Hematology and Cell counts | LP392993-4 | 2 |
| Lymphoma cells | LP29083-0 | 2 |
| Lymphoma cells | Blood | Hematology and Cell counts | LP392940-5 | 2 |
| Lysophosphatidylcholine(26:0) | LP200432-5 | 2 |
| Lysophosphatidylcholine(26:0) | DBS | Chemistry - non-challenge | LP382366-5 | 2 |
| Lysosomal acid lipase | LP189526-9 | 2 |
| Lysosomal acid lipase | Fibroblast | Chemistry - non-challenge | LP385787-9 | 2 |
| Macrocytes | LP17441-4 | 2 |
| Macrophages | Body fluid | Hematology and Cell counts | LP393051-0 | 2 |
| Macrophages | Cerebral spinal fluid | Hematology and Cell counts | LP393052-8 | 2 |
| Macrophages | Synovial fluid | Hematology and Cell counts | LP393056-9 | 2 |
| Macrophages | Vitreous fluid | Hematology and Cell counts | LP393058-5 | 2 |
| Macroprolactin | LP34987-5 | 2 |
| Macroprolactin | Serum or Plasma | Chemistry - non-challenge | LP381394-8 | 2 |
| Magnesium | Hair | Chemistry - non-challenge | LP386024-6 | 2 |
| Magnesium | Red Blood Cells | Chemistry - non-challenge | LP386026-1 | 2 |
| Magnesium | Serum or Plasma | Chemistry - non-challenge | LP386028-7 | 2 |
| Malignant cells | Blood | Hematology and Cell counts | LP393488-4 | 2 |
| Malignant cells | Pericardial fluid | Hematology and Cell counts | LP393491-8 | 2 |
| Malonylcarnitine (C3-DC) | LP70363-4 | 2 |
| Malonylcarnitine (C3-DC) | DBS | Chemistry - non-challenge | LP381744-4 | 2 |
| Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH) | LP133649-6 | 2 |
| Malonylcarnitine (C3-DC)+3-Hydroxybutyrylcarnitine (C4-OH) | DBS | Chemistry - non-challenge | LP381649-5 | 2 |
| Mead acid (C20:3w9) | LP33076-8 | 2 |
| Mesoporphyrin | LP18646-7 | 2 |
| Mesoporphyrin | Stool | Chemistry - non-challenge | LP386481-8 | 2 |
| Mesothelial cells | Body fluid | Hematology and Cell counts | LP393508-9 | 2 |
| Mesothelial cells | Cerebral spinal fluid | Hematology and Cell counts | LP393509-7 | 2 |
| Mesothelial cells | Peritoneal fluid | Hematology and Cell counts | LP393511-3 | 2 |
| Mesothelial cells | Pleural fluid | Hematology and Cell counts | LP393512-1 | 2 |
| Mesothelial cells | Synovial fluid | Hematology and Cell counts | LP393513-9 | 2 |
| Mesothelial cells | Vitreous fluid | Hematology and Cell counts | LP393514-7 | 2 |
| Metamyelocytes | Blood | Hematology and Cell counts | LP392823-3 | 2 |
| Metamyelocytes | Body fluid | Hematology and Cell counts | LP392824-1 | 2 |
| Metamyelocytes | Cerebral spinal fluid | Hematology and Cell counts | LP392825-8 | 2 |
| Methemoglobin | LP15729-4 | 2 |
| Methylmalonylcarnitine (C4-DC) | DBS | Chemistry - non-challenge | LP381640-4 | 2 |
| Methylsuccinate | Urine | Chemistry - non-challenge | LP383951-3 | 2 |
| Misc | LP30609-9 | 2 |
| Mixed cellular casts | Urine sediment | Urinalysis | LP402445-3 | 2 |
| Monoblasts | LP31550-4 | 2 |
| Monoblasts | Blood | Hematology and Cell counts | LP393045-2 | 2 |
| Monoclonal band observed | LP18363-9 | 2 |
| Monocytes | Blood cord | Hematology and Cell counts | LP393029-6 | 2 |
| Monocytes | Body fluid | Hematology and Cell counts | LP393030-4 | 2 |
| Monocytes | Cerebral spinal fluid | Hematology and Cell counts | LP393031-2 | 2 |
| Monocytes | Peritoneal fluid | Hematology and Cell counts | LP393033-8 | 2 |
| Monocytes | Pleural fluid | Hematology and Cell counts | LP393034-6 | 2 |
| Monocytes | Synovial fluid | Hematology and Cell counts | LP393035-3 | 2 |
| Monocytes | Vitreous fluid | Hematology and Cell counts | LP393036-1 | 2 |
| Monocytes Abnormal | LP29084-8 | 2 |
| Monocytes Abnormal | Blood | Hematology and Cell counts | LP393049-4 | 2 |
| Monocytes+Macrophages | Body fluid | Hematology and Cell counts | LP393022-1 | 2 |
| Monocytes+Macrophages | Cerebral spinal fluid | Hematology and Cell counts | LP393023-9 | 2 |
| Monocytes+Macrophages | Peritoneal fluid | Hematology and Cell counts | LP393025-4 | 2 |