| Calcium oxalate dihydrate crystals | LP18873-7 | 2 |
| Calcium oxalate dihydrate crystals | Calculus (stone) | Chemistry - non-challenge | LP386711-8 | 2 |
| Calcium phosphate crystals | Urine sediment | Urinalysis | LP402392-7 | 2 |
| Calcium sulfate crystals | LP16848-1 | 2 |
| Calcium sulfate crystals | Urine sediment | Urinalysis | LP402394-3 | 2 |
| Calcium.ionized | Blood | Chemistry - non-challenge | LP385973-5 | 2 |
| Campesterol | LP99350-8 | 2 |
| Campesterol | Serum or Plasma | Chemistry - non-challenge | LP382383-0 | 2 |
| Candida sp | LP14808-7 | 2 |
| Candida sp | Vaginal | Microbiology | LP444570-8 | 2 |
| Carbon dioxide | Blood cord arterial | Chemistry - non-challenge | LP383325-0 | 2 |
| Carboxy tetrahydrocannabinol | LP14468-0 | 2 |
| Carboxy tetrahydrocannabinol | Urine | Drug toxicology | LP389659-6 | 2 |
| Carnitine free (C0) | Urine | Chemistry - non-challenge | LP381554-7 | 2 |
| Casts | Urine | Urinalysis | LP402424-8 | 2 |
| CD19 cells | LP17749-0 | 2 |
| CD3 cells | Blood | Cell markers | LP399355-9 | 2 |
| CD3+CD4+ (T4 helper) cells | XXX | Cell markers | LP400178-2 | 2 |
| CD3+CD8+ (T8 suppressor) cells | Blood | Cell markers | LP400212-9 | 2 |
| CD45 (Lymphs) cells | LP17732-6 | 2 |
| CD45 (Lymphs) cells | Blood | Cell markers | LP399753-5 | 2 |
| CD56 cells | LP14521-6 | 2 |
| Chenodeoxycholate+Cholate | LP411043-5 | 2 |
| Chlamydia trachomatis | Cervix | Microbiology | LP374500-9 | 2 |
| Cholestanol | Serum or Plasma | Chemistry - non-challenge | LP382384-8 | 2 |
| Cholesterol | Serum or Plasma | Chemistry - non-challenge | LP382412-7 | 2 |
| Cholesterol crystals | Urine sediment | Urinalysis | LP402396-8 | 2 |
| Cholesterol in HDL | Serum or Plasma | Chemistry - non-challenge | LP382427-5 | 2 |
| Cholesterol in VLDL | Serum or Plasma | Chemistry - non-challenge | LP382464-8 | 2 |
| Cholesterol non HDL | LP36472-6 | 2 |
| Cholesterol non HDL | Serum or Plasma | Chemistry - non-challenge | LP382438-2 | 2 |
| Cholinesterase | Serum or Plasma | Chemistry - non-challenge | LP382900-1 | 2 |
| Choriogonadotropin.intact+Beta subunit | LP36886-7 | 2 |
| Choriogonadotropin.intact+Beta subunit | Serum or Plasma | Chemistry - non-challenge | LP381447-4 | 2 |
| Chromium | LP16812-7 | 2 |
| Chronic leukemia markers | LP36897-4 | 2 |
| Chronic leukemia markers | XXX | Cell markers | LP400833-2 | 2 |
| clonazePAM | LP16086-8 | 2 |
| Clostridioides difficile | Stool | Microbiology | LP374643-7 | 2 |
| Clot firmness reduction | LP129070-1 | 2 |
| Clot firmness reduction | Blood | Coagulation | LP394089-9 | 2 |
| Coagulation factor II inhibitor | LP31522-3 | 2 |
| Coagulation factor II inhibitor | Platelet poor plasma | Coagulation | LP394161-6 | 2 |
| Coagulation factor IX inhibitor | LP29020-2 | 2 |
| Coagulation factor IX inhibitor | Platelet poor plasma | Coagulation | LP394192-1 | 2 |
| Coagulation factor V inhibitor | LP29021-0 | 2 |
| Coagulation factor V inhibitor | Platelet poor plasma | Coagulation | LP394166-5 | 2 |
| Coagulation factor VII inhibitor | LP29022-8 | 2 |
| Coagulation factor VII inhibitor | Platelet poor plasma | Coagulation | LP394175-6 | 2 |
| Coagulation factor VIII | LP14702-2 | 2 |
| Coagulation factor VIII activity | LP32958-8 | 2 |
| Coagulation factor VIII activity | Platelet poor plasma | Coagulation | LP394181-4 | 2 |
| Coagulation factor X inhibitor | LP29024-4 | 2 |
| Coagulation factor X inhibitor | Platelet poor plasma | Coagulation | LP394202-8 | 2 |
| Coagulation factor XI inhibitor | LP29025-1 | 2 |
| Coagulation factor XI inhibitor | Platelet poor plasma | Coagulation | LP394208-5 | 2 |
| Coagulation normal/actual | LP449104-1 | 2 |
| Coagulation normal/actual | Platelet poor plasma | Coagulation | LP450579-0 | 2 |
| Cobalamin | LP15505-8 | 2 |
| Cobalt | LP14368-2 | 2 |
| Codeine | LP16093-4 | 2 |
| Codeine | Urine | Drug toxicology | LP389854-3 | 2 |
| Collagen crosslinked N-telopeptide | Urine | Chemistry - non-challenge | LP385998-2 | 2 |
| Complement C1 esterase inhibitor | LP14797-2 | 2 |
| Complement total hemolytic | LP29037-6 | 2 |
| Complement total hemolytic CH50 | LP29040-0 | 2 |
| Complement total hemolytic CH50 | Serum or Plasma | Hematology and Cell counts | LP393687-1 | 2 |
| Copper | LP16814-3 | 2 |
| Coproporphyrin | Serum or Plasma | Chemistry - non-challenge | LP386414-9 | 2 |
| Coproporphyrin | Urine | Chemistry - non-challenge | LP386416-4 | 2 |
| Coproporphyrin 1 | Urine | Chemistry - non-challenge | LP386419-8 | 2 |
| Cortisol Free | Serum or Plasma | Chemistry - non-challenge | LP381064-7 | 2 |
| Cotinine | LP14564-6 | 2 |
| Cotinine | Urine | Drug toxicology | LP387897-4 | 2 |
| Creatine | Serum or Plasma | Chemistry - non-challenge | LP382609-8 | 2 |
| Creatinine | Blood | Chemistry - non-challenge | LP385350-6 | 2 |
| Cryoproteins | LP18699-6 | 2 |
| Crystals | Synovial fluid | Hematology and Cell counts | LP393799-4 | 2 |
| Crystals | Urine | Urinalysis | LP402378-6 | 2 |
| cycloSPORINE | LP16098-3 | 2 |
| cycloSPORINE | Blood | Drug toxicology | LP390573-6 | 2 |
| Cystic fibrosis | LP56779-9 | 2 |
| Cystic fibrosis | DBS | Chemistry - non-challenge | LP385902-4 | 2 |
| Cystine crystals | Urine sediment | Urinalysis | LP402401-6 | 2 |
| Cytidine | LP201693-1 | 2 |
| Cytology report | Cervix or Vagina | Cytology | LP404345-3 | 2 |
| Cytosine | LP201692-3 | 2 |
| D-serine | LP201661-8 | 2 |
| Decanoate (C10:0) | LP33055-2 | 2 |
| Decanoylcarnitine (C10) | LP19317-4 | 2 |
| Decenoate (C10:1) | LP33056-0 | 2 |
| Decenoylcarnitine (C10:1) | LP29044-2 | 2 |
| Dehydroepiandrosterone | Serum or Plasma | Chemistry - non-challenge | LP381153-8 | 2 |
| Dehydroepiandrosterone sulfate | LP15527-2 | 2 |
| Dehydroepiandrosterone sulfate | Serum or Plasma | Chemistry - non-challenge | LP381157-9 | 2 |
| Delta aminolevulinate | Urine | Chemistry - non-challenge | LP386439-6 | 2 |
| Deoxyadenosine | LP99925-7 | 2 |
| Deoxyguanosine | LP99926-5 | 2 |
| Deoxyinosine | LP99927-3 | 2 |
| Deoxyuridine | LP61824-6 | 2 |