| Coproporphyrin 3 | Serum or Plasma | Chemistry - non-challenge | LP386424-8 | 1 |
| Corticosterone | LP15508-2 | 1 |
| Corticosterone | Serum or Plasma | Chemistry - non-challenge | LP381055-5 | 1 |
| Corticotropin | LP14656-0 | 1 |
| Corticotropin | Plasma | Chemistry - non-challenge | LP381359-1 | 1 |
| Cortisol | DBS | Chemistry - non-challenge | LP381057-1 | 1 |
| Cortisol | Saliva | Chemistry - non-challenge | LP381060-5 | 1 |
| Creatine | Cerebral spinal fluid | Chemistry - non-challenge | LP382608-0 | 1 |
| Creatine | DBS | Chemistry - non-challenge | LP440617-1 | 1 |
| Creatine | Urine | Chemistry - non-challenge | LP382610-6 | 1 |
| Creatine kinase | Serum or Plasma | Chemistry - non-challenge | LP382927-4 | 1 |
| Creatine kinase isoenzymes | Serum or Plasma | Chemistry - non-challenge | LP382928-2 | 1 |
| Creatine kinase.BB | LP15511-6 | 1 |
| Creatine kinase.BB | Serum or Plasma | Chemistry - non-challenge | LP382931-6 | 1 |
| Creatine kinase.MB | Blood | Chemistry - non-challenge | LP382936-5 | 1 |
| Creatine kinase.MM | LP15514-0 | 1 |
| Creatine kinase.MM | Serum or Plasma | Chemistry - non-challenge | LP382941-5 | 1 |
| Creatinine | Amniotic fluid | Chemistry - non-challenge | LP385349-8 | 1 |
| Creatinine | Blood arterial | Chemistry - non-challenge | LP385351-4 | 1 |
| Creatinine | Body fluid | Chemistry - non-challenge | LP385352-2 | 1 |
| Creatinine | Dialysis fluid | Chemistry - non-challenge | LP385354-8 | 1 |
| Creatinine reduction ratio | LP100774-1 | 1 |
| Creatinine reduction ratio | Serum or Plasma | Chemistry - non-challenge | LP385373-8 | 1 |
| Crotonylglycine | LP411705-9 | 1 |
| Cryofibrinogen | LP15024-0 | 1 |
| Cryofibrinogen | Plasma | Chemistry - non-challenge | LP384559-3 | 1 |
| Cryoglobulin | LP15516-5 | 1 |
| Cryoglobulin | Serum | Chemistry - non-challenge | LP384561-9 | 1 |
| Cryptococcus sp | LP17114-7 | 1 |
| Cryptococcus sp | XXX | Microbiology | LP444572-4 | 1 |
| Cryptosporidium parvum | LP35695-3 | 1 |
| Cryptosporidium parvum | Stool | Microbiology | LP444615-1 | 1 |
| Crystals | Body fluid | Hematology and Cell counts | LP393794-5 | 1 |
| Crystals.amorphous | Urine sediment | Urinalysis | LP402398-4 | 1 |
| Cystathionine | Amniotic fluid | Chemistry - non-challenge | LP383856-4 | 1 |
| Cystathionine | Cerebral spinal fluid | Chemistry - non-challenge | LP383859-8 | 1 |
| Cystathionine | Serum or Plasma | Chemistry - non-challenge | LP383860-6 | 1 |
| Cystatin C | LP31553-8 | 1 |
| Cystatin C | Serum or Plasma | Chemistry - non-challenge | LP384565-0 | 1 |
| Cysteine | LP15521-5 | 1 |
| Cysteine | Serum or Plasma | Chemistry - non-challenge | LP383868-9 | 1 |
| Cystine | Amniotic fluid | Chemistry - non-challenge | LP383873-9 | 1 |
| Cystine | Calculus (stone) | Chemistry - non-challenge | LP383876-2 | 1 |
| Cystine | Cerebral spinal fluid | Chemistry - non-challenge | LP383877-0 | 1 |
| Cystine | Serum or Plasma | Chemistry - non-challenge | LP383879-6 | 1 |
| Cytidine | Cerebral spinal fluid | Chemistry - non-challenge | LP383485-2 | 1 |
| Cytidine | Serum or Plasma | Chemistry - non-challenge | LP383486-0 | 1 |
| Cytochrome C oxidase | LP15525-6 | 1 |
| Cytochrome C oxidase | Tissue and Smears | Chemistry - non-challenge | LP382956-3 | 1 |
| Cytology report | Tissue FNA | Cytology | LP404351-1 | 1 |
| Cytomegalovirus | Blood | Microbiology | LP377232-6 | 1 |
| Cytosine | Cerebral spinal fluid | Chemistry - non-challenge | LP383488-6 | 1 |
| Cytosine | Serum or Plasma | Chemistry - non-challenge | LP383489-4 | 1 |
| D-2-hydroxyglutarate | Amniotic fluid | Chemistry - non-challenge | LP386248-1 | 1 |
| D-2-hydroxyglutarate | Cerebral spinal fluid | Chemistry - non-challenge | LP386250-7 | 1 |
| D-2-hydroxyglutarate | DBS | Chemistry - non-challenge | LP386249-9 | 1 |
| D-2-hydroxyglutarate | Serum or Plasma | Chemistry - non-challenge | LP386251-5 | 1 |
| D-serine | Cerebral spinal fluid | Chemistry - non-challenge | LP384342-4 | 1 |
| D-serine | Serum or Plasma | Chemistry - non-challenge | LP384343-2 | 1 |
| Dacrocytes | LP17677-3 | 1 |
| Dacrocytes | Blood | Hematology and Cell counts | LP393406-6 | 1 |
| Decadienoylcarnitine (C10:2) | LP70085-3 | 1 |
| Decadienoylcarnitine (C10:2) | DBS | Chemistry - non-challenge | LP381796-4 | 1 |
| Decanoate (C10:0) | Red Blood Cells | Chemistry - non-challenge | LP382064-6 | 1 |
| Decanoate (C10:0) | Serum or Plasma | Chemistry - non-challenge | LP382065-3 | 1 |
| Decanoylcarnitine (C10) | DBS | Chemistry - non-challenge | LP381770-9 | 1 |
| Decanoylcarnitine (C10) | Serum or Plasma | Chemistry - non-challenge | LP381773-3 | 1 |
| Decatrienoylcarnitine (C10:3) | LP70095-2 | 1 |
| Decatrienoylcarnitine (C10:3) | DBS | Chemistry - non-challenge | LP381802-0 | 1 |
| Decenoate (C10:1) | Red Blood Cells | Chemistry - non-challenge | LP382083-6 | 1 |
| Decenoate (C10:1) | Serum or Plasma | Chemistry - non-challenge | LP382084-4 | 1 |
| Decenoylcarnitine (C10:1) | DBS | Chemistry - non-challenge | LP381784-0 | 1 |
| Decenoylcarnitine (C10:1) | Serum or Plasma | Chemistry - non-challenge | LP381787-3 | 1 |
| Dehydroepiandrosterone.unconjugated | LP15529-8 | 1 |
| Dehydroepiandrosterone.unconjugated | Serum or Plasma | Chemistry - non-challenge | LP381161-1 | 1 |
| Dehydrosebacylcarnitine (C10:1-DC) | LP70097-8 | 1 |
| Dehydrosebacylcarnitine (C10:1-DC) | DBS | Chemistry - non-challenge | LP381793-1 | 1 |
| Dehydrosuberylcarnitine (C8:1-DC) | LP70096-0 | 1 |
| Dehydrosuberylcarnitine (C8:1-DC) | DBS | Chemistry - non-challenge | LP381759-2 | 1 |
| Delta aminolevulinate | Serum or Plasma | Chemistry - non-challenge | LP386438-8 | 1 |
| Deoxyadenosine | Cerebral spinal fluid | Chemistry - non-challenge | LP383491-0 | 1 |
| Deoxyadenosine | Serum or Plasma | Chemistry - non-challenge | LP383492-8 | 1 |
| Deoxycholate | LP15530-6 | 1 |
| Deoxycholate | Serum or Plasma | Chemistry - non-challenge | LP385324-1 | 1 |
| Deoxyguanosine | Cerebral spinal fluid | Chemistry - non-challenge | LP383494-4 | 1 |
| Deoxyguanosine | Serum or Plasma | Chemistry - non-challenge | LP383495-1 | 1 |
| Deoxyinosine | Cerebral spinal fluid | Chemistry - non-challenge | LP383497-7 | 1 |
| Deoxyinosine | Serum or Plasma | Chemistry - non-challenge | LP383498-5 | 1 |
| Deoxyuridine | Cerebral spinal fluid | Chemistry - non-challenge | LP383500-8 | 1 |
| Deoxyuridine | Serum or Plasma | Chemistry - non-challenge | LP383501-6 | 1 |
| Dermatan sulfate | DBS | Chemistry - non-challenge | LP386002-2 | 1 |
| Dermatan sulfate | Serum or Plasma | Chemistry - non-challenge | LP386003-0 | 1 |
| Dermatan sulfate | Urine | Chemistry - non-challenge | LP386004-8 | 1 |
| Desethylamiodarone | LP14709-7 | 1 |
| Desethylamiodarone | Serum or Plasma | Drug toxicology | LP389180-3 | 1 |
| Dicarboxydodecanoylcarnitine (C12-DC) | LP70100-0 | 1 |
| Dicarboxydodecanoylcarnitine (C12-DC) | DBS | Chemistry - non-challenge | LP381815-2 | 1 |
| Dicarboxydodecenoylcarnitine (C12:1-DC) | LP70099-4 | 1 |
| Dicarboxydodecenoylcarnitine (C12:1-DC) | DBS | Chemistry - non-challenge | LP381829-3 | 1 |
| Dicarboxyoleylcarnitine (C18:1-DC) | LP70105-9 | 1 |