| Mullerian inhibiting substance | Serum or Plasma | Chemistry - non-challenge | LP381332-8 | 1 |
| Multiple cardiovascular effects | LP31493-7 | 1 |
| Mycobacterium sp | Blood | Microbiology | LP375230-2 | 1 |
| Mycobacterium sp | XXX | Microbiology | LP375231-0 | 1 |
| Mycophenolate | LP14351-8 | 1 |
| Mycophenolate | Serum or Plasma | Drug toxicology | LP390589-2 | 1 |
| Mycoplasma pneumoniae | LP14249-4 | 1 |
| Mycoplasma pneumoniae | XXX | Microbiology | LP375486-0 | 1 |
| Mycoplasma sp | XXX | Microbiology | LP375472-0 | 1 |
| Myelin basic protein | LP14685-9 | 1 |
| Myelin basic protein | Cerebral spinal fluid | Chemistry - non-challenge | LP382618-9 | 1 |
| Myoglobin | Blood | Chemistry - non-challenge | LP382620-5 | 1 |
| Myoglobin | Serum or Plasma | Chemistry - non-challenge | LP382621-3 | 1 |
| Myristate (C14:0) | Red Blood Cells | Chemistry - non-challenge | LP382069-5 | 1 |
| Myristate (C14:0) | Serum or Plasma | Chemistry - non-challenge | LP382070-3 | 1 |
| Myristoleate (C14:1) | LP33066-9 | 1 |
| Myristoleate (C14:1) | Serum or Plasma | Chemistry - non-challenge | LP382088-5 | 1 |
| N-acetyl-L-aspartate | LP18445-4 | 1 |
| N-acetyl-L-aspartate | Urine | Chemistry - non-challenge | LP384194-9 | 1 |
| N-Acetylgalactosamine-4-Sulfatase | Serum | Chemistry - non-challenge | LP385801-8 | 1 |
| N-Acetylgalactosamine-4-Sulfatase | White blood cells | Chemistry - non-challenge | LP385804-2 | 1 |
| N-Acetylgalactosamine-6-Sulfatase | LP14032-4 | 1 |
| N-Acetylgalactosamine-6-Sulfatase | White blood cells | Chemistry - non-challenge | LP385808-3 | 1 |
| N-Acetylglucosamine-6-Sulfatase | LP14033-2 | 1 |
| N-Acetylglucosamine-6-Sulfatase | White blood cells | Chemistry - non-challenge | LP385812-5 | 1 |
| N-acetylprocainamide | LP16209-6 | 1 |
| N-acetylprocainamide | Serum or Plasma | Drug toxicology | LP389212-4 | 1 |
| N-acetyltyrosine | LP18446-2 | 1 |
| N-acetyltyrosine | Urine | Chemistry - non-challenge | LP384197-2 | 1 |
| N-carbamoyl beta alanine | Cerebral spinal fluid | Chemistry - non-challenge | LP383679-0 | 1 |
| N-carbamoyl beta alanine | Serum or Plasma | Chemistry - non-challenge | LP383680-8 | 1 |
| NADH cytochrome C reductase | LP33249-1 | 1 |
| NADH cytochrome C reductase | Tissue and Smears | Chemistry - non-challenge | LP383152-8 | 1 |
| NADH dehydrogenase | LP15742-7 | 1 |
| NADH dehydrogenase | Tissue and Smears | Chemistry - non-challenge | LP383156-9 | 1 |
| Natriuretic peptide B | Blood | Chemistry - non-challenge | LP385934-7 | 1 |
| Natriuretic peptide B | Serum or Plasma | Chemistry - non-challenge | LP385935-4 | 1 |
| Natriuretic peptide.B prohormone N-Terminal | LP31268-3 | 1 |
| Natriuretic peptide.B prohormone N-Terminal | Serum or Plasma | Chemistry - non-challenge | LP385939-6 | 1 |
| Necroinflammatory activity grade | LP63142-1 | 1 |
| Necroinflammatory activity grade | Serum or Plasma | Chemistry - non-challenge | LP385327-4 | 1 |
| Necroinflammatory activity interpretation | LP265592-8 | 1 |
| Necroinflammatory activity interpretation | Serum | Chemistry - non-challenge | LP385328-2 | 1 |
| Necroinflammatory activity score | LP63141-3 | 1 |
| Necroinflammatory activity score | Serum or Plasma | Chemistry - non-challenge | LP385326-6 | 1 |
| Neisseria gonorrhoeae | Genital | Microbiology | LP375500-8 | 1 |
| Neisseria gonorrhoeae | Urethra | Microbiology | LP375506-5 | 1 |
| Neopterin | Cerebral spinal fluid | Chemistry - non-challenge | LP384309-3 | 1 |
| Neopterin | Serum or Plasma | Chemistry - non-challenge | LP384310-1 | 1 |
| Neopterin | Urine | Chemistry - non-challenge | LP384311-9 | 1 |
| Nervonate (C24:1) | Red Blood Cells | Chemistry - non-challenge | LP382106-5 | 1 |
| Nervonate (C24:1) | Serum or Plasma | Chemistry - non-challenge | LP382107-3 | 1 |
| Neural tube defect risk | Fetus | Chemistry - non-challenge | LP386681-3 | 1 |
| Neural tube defect risk | Population | Chemistry - non-challenge | LP386682-1 | 1 |
| Neutrophil.fMLP stimulated.DHR mean fluorescence intensity | Blood | Hematology and Cell counts | LP392698-9 | 1 |
| Neutrophil.fMLP stimulated.DHR mean fluorescence intensity | Control | Blood | Hematology and Cell counts | LP392699-7 | 1 |
| Neutrophil.fMLP stimulated.DHR mean fluorescence intensity | Control | Hematology and Cell counts | LP392700-3 | 1 |
| Neutrophil.PMA stimulated.DHR mean fluorescence instensity | Blood | Hematology and Cell counts | LP392692-2 | 1 |
| Neutrophil.PMA stimulated.DHR mean fluorescence instensity | Control | Blood | Hematology and Cell counts | LP392693-0 | 1 |
| Neutrophil.PMA stimulated.DHR mean fluorescence instensity | Control | Hematology and Cell counts | LP392694-8 | 1 |
| Neutrophils | Amniotic fluid | Hematology and Cell counts | LP433120-5 | 1 |
| Neutrophils | Control | Blood | Hematology and Cell counts | LP392653-4 | 1 |
| Neutrophils | Control | Hematology and Cell counts | LP392654-2 | 1 |
| Neutrophils | Pericardial fluid | Hematology and Cell counts | LP392646-8 | 1 |
| Neutrophils | Stool | Hematology and Cell counts | LP392650-0 | 1 |
| Neutrophils.agranular | LP30826-9 | 1 |
| Neutrophils.agranular | Blood | Hematology and Cell counts | LP392709-4 | 1 |
| Neutrophils.vacuolated | LP19286-1 | 1 |
| Neutrophils.vacuolated | Blood | Hematology and Cell counts | LP392707-8 | 1 |
| Newberyite crystals | LP18872-9 | 1 |
| Newberyite crystals | Calculus (stone) | Chemistry - non-challenge | LP386722-5 | 1 |
| Newborn conditions with equivocal markers | LP97570-3 | 1 |
| Newborn conditions with equivocal markers | DBS | Chemistry - non-challenge | LP407460-7 | 1 |
| Newborn conditions with positive markers | LP97106-6 | 1 |
| Newborn conditions with positive markers | DBS | Chemistry - non-challenge | LP407461-5 | 1 |
| Newborn screening report - overall interpretation | LP97105-8 | 1 |
| Newborn screening report - overall interpretation | Patient | Chemistry - non-challenge | LP407463-1 | 1 |
| Niacin | LP14887-1 | 1 |
| Niacin | Serum or Plasma | Chemistry - non-challenge | LP385155-9 | 1 |
| Nicotine | Urine | Drug toxicology | LP387889-1 | 1 |
| Niemann Pick disease A/B | LP113910-6 | 1 |
| Niemann Pick disease A/B | DBS | Chemistry - non-challenge | LP421936-8 | 1 |
| Nitrite | Water | Chemistry - non-challenge | LP385407-4 | 1 |
| Non-gyn cytology study | LP431576-0 | 1 |
| Non-gyn cytology study | Patient | Pathology | LP448403-8 | 1 |
| Nonalcoholic steatohepatitis grade | LP411864-4 | 1 |
| Nonalcoholic steatohepatitis grade | Serum or Plasma | Chemistry - non-challenge | LP416990-2 | 1 |
| Nonalcoholic steatohepatitis interpretation | LP411862-8 | 1 |
| Nonalcoholic steatohepatitis interpretation | Serum or Plasma | Chemistry - non-challenge | LP416991-0 | 1 |
| Nonalcoholic steatohepatitis score | LP411863-6 | 1 |
| Nonalcoholic steatohepatitis score | Serum or Plasma | Chemistry - non-challenge | LP416992-8 | 1 |
| Nonanoylcarnitine (C9) | LP70094-5 | 1 |
| Nonanoylcarnitine (C9) | DBS | Chemistry - non-challenge | LP381766-7 | 1 |
| Norclozapine | LP18081-7 | 1 |
| Norclozapine | Serum or Plasma | Drug toxicology | LP391284-9 | 1 |
| Nordiazepam | Serum or Plasma | Drug toxicology | LP391860-6 | 1 |
| Normetanephrine | Serum or Plasma | Chemistry - non-challenge | LP381255-1 | 1 |
| Normetanephrine Free | LP35625-0 | 1 |
| Normetanephrine Free | Serum or Plasma | Chemistry - non-challenge | LP381257-7 | 1 |
| Normochromic | LP31532-2 | 1 |