| 2003182 | Lacosamide, Serum or Plasma |
| 0020413 | Lactate Dehydrogenase, Isoenzymes |
| 0020006 | Lactate Dehydrogenase, Serum or Plasma |
| 0020505 | Lactate Dehydrogenase Total, Body Fluid |
| 2007935 | Lactate to Pyruvate Ratio |
| 0020504 | Lactic Acid, Body Fluid |
| 0020516 | Lactic Acid, CSF |
| 0020045 | Lactic Acid, Plasma |
| 0061164 | Lactoferrin, Fecal by ELISA |
| 0020407 | Lactose Tolerance |
| 0050682 | Lambda Free Light Chains (Bence Jones Protein), Quantitative, Urine |
| 2003984 | Lambda Light Chains by Immunohistochemistry |
| 0080940 | Lamellar Body Counts |
| 2003987 | Laminin by Immunohistochemistry |
| 0090177 | Lamotrigine |
| 0020257 | LDL Cholesterol, Direct |
| 0050021 | LDL Subclasses |
| 2007733 | LEA Antigen Typing - Patient |
| 2007346 | Lead Analysis, Hair |
| 2007348 | Lead Analysis, Nails |
| 0020745 | Lead, Blood (Capillary) |
| 0020098 | Lead, Blood (Venous) |
| 0025016 | Lead, Industrial Exposure Panel, Adults |
| 0025060 | Lead, Urine |
| 2007723 | LEB Antigen Typing - Patient |
| 0080200 | Lecithin-Sphingomyelin Ratio |
| 2007460 | Leflunomide Metabolite, Serum or Plasma |
| 0093304 | Leflunomide (Teriflunomide), Blood |
| 0093306 | Leflunomide (Teriflunomide), Urine |
| 0050376 | Legionella pneumophila Antibody (Type 1), IgG by IFA |
| 0050273 | Legionella pneumophila Antibody (Type 1), IgM by IFA |
| 0050365 | Legionella pneumophila Antibody (Types 1-6), IgG by IFA |
| 0050274 | Legionella pneumophila Antibody (Types 1-6), IgM by IFA |
| 0070322 | Legionella pneumophila Antigen, Urine |
| 2004598 | Legionella pneumophila DFA |
| 0056105 | Legionella Species by PCR |
| 0060113 | Legionella Species, Culture |
| 2002945 | Legius Syndrome (SPRED1) Sequencing and (NF1) Sequencing Exon 22 (Exon 17) |
| 0051726 | Leishmania Antibody, IgG (Visceral Leishmaniasis) |
| 0070263 | Leptin |
| 0050786 | Leptospira Antibody |
| 0055233 | Leptospira Antibody, IgM by Dot Blot |
| 0060158 | Leptospira Culture |
| 0080301 | Leucine Aminopeptidase (LAP), Serum |
| 2008003 | Leukemia/Lymphoma Phenotyping by Flow Cytometry |
| 2004359 | Leukocyte Adhesion Deficiency Panel |
| 0049000 | Leukocyte Alkaline Phosphatase |
| 0099603 | Leukocyte Lysosomal Enzyme |
| 0091351 | Levodopa Quantitative, Serum or Plasma |
| 0090148 | Librium and Nordiazepam |
| 0090155 | Lidocaine |
| 0091197 | Lidocaine & Metabolite, Serum or Plasma |
| 0091198 | Lidocaine and Metabolite, Urine |
| 0020715 | Lipase, Fluid |
| 0020014 | Lipase, Serum or Plasma |
| 0080467 | Lipid Associated Sialic Acid |
| 0020421 | Lipid Panel |
| 0020468 | Lipid Panel, Extended |
| 0092252 | Lipid Peroxides (TBARS), Serum |
| 0099174 | Lipoprotein (a) |
| 0080503 | Lipoprotein Electrophoresis |
| 0080570 | Lipoprotein Electrophoresis with Qualitative Band Assessment |
| 0081055 | Lipoprotein-Associated Phospholipase A2 (PLAC®) |
| 2002086 | Listeria Antibody, CSF by CF |
| 0099529 | Listeria Antibody, Serum by CF |
| 0020038 | Lithium, Serum or Plasma |
| 2007939 | Little c Antigen Typing - Patient |
| 2007943 | Little e Antigen Typing - Patient |
| 2007721 | Little s Antigen Typing - Patient |
| 0055241 | Liver-Kidney Microsome - 1 Antibody, IgG |
| 0099270 | Liver-Kidney Microsome Antibody, IgG |
| 2004539 | LMNA-Related Disorders (LMNA) Deletion/Duplication |
| 2004543 | LMNA-Related Disorders (LMNA) Sequencing |
| 2002697 | Loeys-Dietz Syndrome (TGBR1 & TGBR2) Deletion/Duplication |
| 2002705 | Loeys-Dietz Syndrome (TGFBR1 & TGFBR2) Sequencing |
| 2002701 | Loeys-Dietz Syndrome (TGFBR1 & TGFBR2) Sequencing & Deletion/Duplication |
| 2006232 | Long QT Syndrome (LQTS) Panel, 12 Genes |
| 0090181 | Lorazepam |
| 0091295 | Loxapine, Serum or Plasma |
| 0091499 | Loxapine, Urine |
| 0091200 | LSD, Serum or Plasma - Screen with Reflex to Confirmation/Quantitation |
| 0091224 | LSD, Urine - Screen with Reflex to Confirmation/Quantitation |
| 2007513 | Lung Cancer Assessment and Early Detection (EarlyCDT) |
| 0030181 | Lupus Anticoagulant Reflexive Panel |
| 0050119 | Lupus Comprehensive Reflexive Panel |
| 0070193 | Luteinizing Hormone and Follicle Stimulating Hormone |
| 2007567 | Luteinizing Hormone (LH), Pediatric |
| 0070093 | Luteinizing Hormone, Serum |
| 0096056 | Lymphocyte Antigen and Mitogen Proliferation Panel |
| 0051584 | Lymphocyte Antigen and Mitogen Proliferation Panel with Cytokine Response to Mitogens, 12 Cytokines |
| 0051587 | Lymphocyte Antigen and Mitogen Proliferation Panel with Cytokine Response to Mitogens, Monokines |
| 0051585 | Lymphocyte Antigen and Mitogen Proliferation Panel with Cytokine Response to Mitogens, TH1 Cytokines |
| 0051586 | Lymphocyte Antigen and Mitogen Proliferation Panel with Cytokine Response to Mitogens, TH2 Cytokines |
| 0096055 | Lymphocyte Antigen Proliferation |
| 0096043 | Lymphocyte Mitogen Proliferation |
| 0095854 | Lymphocyte Subset Panel 1 - CD4 Absolute Count Only |
| 0095885 | Lymphocyte Subset Panel 2 - CD4 Percent and Absolute |
| 0095853 | Lymphocyte Subset Panel 3 - T-Cell Subsets (CD4 and CD8), Absolute Counts Only |
| 0095950 | Lymphocyte Subset Panel 4 - T-Cell Subsets Percent and Absolute, Whole Blood |
| 0095892 | Lymphocyte Subset Panel 5 - Total Lymphocyte Enumeration |
| 0095862 | Lymphocyte Subset Panel 6 - Total Lymphocyte Enumeration with CD45RA and CD45RO |
| 0095899 | Lymphocyte Subset Panel 7 - Congenital Immunodeficiencies |
| 0093420 | Lymphocyte Subset Panel 4 - T-Cell Subsets Percent and Ratio, Bronchoalveolar Lavage |
| 0095949 | Lymphocyte Transplantation CD3 |
| 0095798 | Lymphocyte Transplantation Profile |
| 2001635 | Lymphocytic Choriomeningitis (LCM) Virus Antibodies, IgG & IgM |
| 2001628 | Lymphocytic Choriomeningitis (LCM) Virus Antibodies, IgG & IgM, CSF |
| 2001633 | Lymphocytic Choriomeningitis (LCM) Virus Antibody, IgG |
| 2001629 | Lymphocytic Choriomeningitis (LCM) Virus Antibody, IgG, CSF |
| 2001634 | Lymphocytic Choriomeningitis (LCM) Virus Antibody, IgM |
| 2001630 | Lymphocytic Choriomeningitis (LCM) Virus Antibody, IgM, CSF |
| 0098880 | Lymphogranuloma Venereum (LGV), Differentiation Antibody Panel, MIF |
| 2002650 | Lymphoma (Aggressive) Panel by FISH |
| 2003990 | Lysozyme (Muramidase) by Immunohistochemistry |
| 0050367 | Lysozyme, Serum or Body Fluid |
| 0050368 | Lysozyme, Urine |