| Amikacin | Serum or Plasma | Drug toxicology | LP388863-5 | 1 |
| Amino acid pattern | Serum or Plasma | Chemistry - non-challenge | LP383617-0 | 1 |
| Amino acid pattern | Urine | Chemistry - non-challenge | LP383618-8 | 1 |
| Amino acidemia disorder suspected | LP97725-3 | 1 |
| Amino acidemia disorder suspected | DBS | Chemistry - non-challenge | LP416994-4 | 1 |
| Amino acidemias | DBS | Chemistry - non-challenge | LP385843-0 | 1 |
| Amino beta guanidinopropionate | Amniotic fluid | Chemistry - non-challenge | LP383731-9 | 1 |
| Amino beta guanidinopropionate | Cerebral spinal fluid | Chemistry - non-challenge | LP383732-7 | 1 |
| Amino beta guanidinopropionate | Serum or Plasma | Chemistry - non-challenge | LP383734-3 | 1 |
| Amiodarone | Serum or Plasma | Drug toxicology | LP389176-1 | 1 |
| Amiodarone+Desethylamiodarone | LP20909-5 | 1 |
| Amiodarone+Desethylamiodarone | Serum or Plasma | Drug toxicology | LP389179-5 | 1 |
| Amitriptyline | LP14983-8 | 1 |
| Ammonia nitrogen | LP15381-4 | 1 |
| Ammonia nitrogen | Urine | Chemistry - non-challenge | LP385237-5 | 1 |
| Ammonium | LP15382-2 | 1 |
| Ammonium | Calculus (stone) | Chemistry - non-challenge | LP385238-3 | 1 |
| Ammonium urate crystals | Calculus (stone) | Chemistry - non-challenge | LP386699-5 | 1 |
| Amorphous sediment | LP17769-8 | 1 |
| Amorphous sediment | Urine sediment | Urinalysis | LP402512-0 | 1 |
| Amphetamine | Urine | Drug toxicology | LP389360-1 | 1 |
| Amphetamines | Serum or Plasma | Drug toxicology | LP389367-6 | 1 |
| Amylase | Body fluid | Chemistry - non-challenge | LP382773-2 | 1 |
| Amylase | Serum or Plasma | Chemistry - non-challenge | LP382784-9 | 1 |
| Amylase | Urine | Chemistry - non-challenge | LP382787-2 | 1 |
| Amylase isoenzymes | Serum or Plasma | Chemistry - non-challenge | LP382790-6 | 1 |
| Amyloid A | LP63040-7 | 1 |
| Amyloid A | Serum or Plasma | Chemistry - non-challenge | LP384527-0 | 1 |
| Amyloid beta 40 peptide | LP145733-4 | 1 |
| Amyloid beta 40 peptide | Cerebral spinal fluid | Chemistry - non-challenge | LP384530-4 | 1 |
| Anabasine | LP31704-7 | 1 |
| Anabasine | Urine | Drug toxicology | LP387891-7 | 1 |
| Androstanolone | LP15385-5 | 1 |
| Androstanolone | Serum or Plasma | Chemistry - non-challenge | LP381134-8 | 1 |
| Androstenedione | DBS | Chemistry - non-challenge | LP381139-7 | 1 |
| Angiotensin (1-7) | LP419475-1 | 1 |
| Angiotensin (1-7) | Plasma | Chemistry - non-challenge | LP421940-0 | 1 |
| Angiotensin converting enzyme | Blood | Chemistry - non-challenge | LP382823-5 | 1 |
| Angiotensin converting enzyme | Cerebral spinal fluid | Chemistry - non-challenge | LP382824-3 | 1 |
| Angiotensin converting enzyme | Serum or Plasma | Chemistry - non-challenge | LP382827-6 | 1 |
| Angiotensin II | LP15389-7 | 1 |
| Angiotensin II | Plasma | Chemistry - non-challenge | LP385930-5 | 1 |
| Anion gap | Blood | Chemistry - non-challenge | LP386537-7 | 1 |
| Anion gap | Blood venous | Chemistry - non-challenge | LP443444-7 | 1 |
| Anion gap | Serum or Plasma | Chemistry - non-challenge | LP386539-3 | 1 |
| Anisocytosis | LP17274-9 | 1 |
| Anisocytosis | Blood | Hematology and Cell counts | LP393399-3 | 1 |
| Anserine | Amniotic fluid | Chemistry - non-challenge | LP383771-5 | 1 |
| Anserine | Cerebral spinal fluid | Chemistry - non-challenge | LP383772-3 | 1 |
| Anserine | Serum or Plasma | Chemistry - non-challenge | LP383773-1 | 1 |
| Antifungals | LP31435-8 | 1 |
| Apolipoprotein A-II | LP15396-2 | 1 |
| Apolipoprotein A-II | Serum or Plasma | Chemistry - non-challenge | LP382583-5 | 1 |
| Apolipoprotein B-100 | LP15397-0 | 1 |
| Apolipoprotein B-100 | Serum or Plasma | Chemistry - non-challenge | LP382587-6 | 1 |
| Apolipoprotein C | LP15411-9 | 1 |
| Apolipoprotein C | Serum or Plasma | Chemistry - non-challenge | LP382591-8 | 1 |
| Apolipoprotein E | Cerebral spinal fluid | Chemistry - non-challenge | LP428591-4 | 1 |
| Apolipoprotein E phenotype | LP31831-8 | 1 |
| Apolipoprotein E phenotype | Cerebral spinal fluid | Chemistry - non-challenge | LP428592-2 | 1 |
| Apolipoprotein LPA | LP15408-5 | 1 |
| Apolipoprotein LPA | Serum or Plasma | Chemistry - non-challenge | LP382604-9 | 1 |
| Appearance | LP14542-2 | 1 |
| Arachidate (C20:0) | Red Blood Cells | Chemistry - non-challenge | LP382080-2 | 1 |
| Arachidate (C20:0) | Serum or Plasma | Chemistry - non-challenge | LP382081-0 | 1 |
| Arachidonate (C20:4w6) | Red Blood Cells | Chemistry - non-challenge | LP382132-1 | 1 |
| Arginine | Amniotic fluid | Chemistry - non-challenge | LP383782-2 | 1 |
| Arginine | Cerebral spinal fluid | Chemistry - non-challenge | LP383786-3 | 1 |
| Arginine | Serum or Plasma | Chemistry - non-challenge | LP383788-9 | 1 |
| Argininosuccinate | Cerebral spinal fluid | Chemistry - non-challenge | LP385683-0 | 1 |
| Argininosuccinate | Serum or Plasma | Chemistry - non-challenge | LP385684-8 | 1 |
| Arsenic | Blood | Drug toxicology | LP388145-7 | 1 |
| Arsenic organic | LP36413-0 | 1 |
| Arsenic organic | Urine | Drug toxicology | LP388161-4 | 1 |
| Arsenic trioxide | LP19295-2 | 1 |
| Arsenic trioxide | Urine | Drug toxicology | LP388162-2 | 1 |
| Arsenic.inorganic+methylated | LP420991-4 | 1 |
| Arsenic.inorganic+methylated | Urine | Drug toxicology | LP421507-7 | 1 |
| Arsenic.methylated | LP71241-1 | 1 |
| Arsenic.methylated | Urine | Drug toxicology | LP388160-6 | 1 |
| Arsenite | LP417698-0 | 1 |
| Arsenite | Urine | Drug toxicology | LP418983-5 | 1 |
| Arsenobetaine | LP417699-8 | 1 |
| Arsenobetaine | Urine | Drug toxicology | LP419094-0 | 1 |
| Arsenocholine | LP417700-4 | 1 |
| Arsenocholine | Urine | Drug toxicology | LP419095-7 | 1 |
| Artifact | Urine | Urinalysis | LP421039-1 | 1 |
| Artifact | Urine sediment | Urinalysis | LP402511-2 | 1 |
| Asparagine | Amniotic fluid | Chemistry - non-challenge | LP383807-7 | 1 |
| Asparagine | Cerebral spinal fluid | Chemistry - non-challenge | LP383810-1 | 1 |
| Asparagine | Serum or Plasma | Chemistry - non-challenge | LP383811-9 | 1 |
| Aspartate | Amniotic fluid | Chemistry - non-challenge | LP383815-0 | 1 |
| Aspartate | Cerebral spinal fluid | Chemistry - non-challenge | LP383818-4 | 1 |
| Aspartate | DBS | Chemistry - non-challenge | LP383816-8 | 1 |
| Aspartate | Serum or Plasma | Chemistry - non-challenge | LP383820-0 | 1 |
| Aspartate aminotransferase | LP15426-7 | 1 |
| Aspartate aminotransferase | Serum or Plasma | Chemistry - non-challenge | LP382836-7 | 1 |
| Aspartylglycosamine | Cerebral spinal fluid | Chemistry - non-challenge | LP418138-6 | 1 |
| Aspartylglycosamine | Serum or Plasma | Chemistry - non-challenge | LP384774-8 | 1 |
| Auer rods | LP15199-0 | 1 |