| Stearoylcarnitine (C18) | Serum or Plasma | Chemistry - non-challenge | LP381931-7 | 1 |
| Stigmastanol | LP173721-4 | 1 |
| Stigmastanol | Serum or Plasma | Chemistry - non-challenge | LP382495-2 | 1 |
| Stomatocytes | LP14576-0 | 1 |
| Stomatocytes | Blood | Hematology and Cell counts | LP393430-6 | 1 |
| Streptococcal DNAse B | LP16689-9 | 1 |
| Streptococcal DNAse B | Serum | Microbiology | LP375970-3 | 1 |
| Streptococcus agalactiae | Genital | Microbiology | LP376010-7 | 1 |
| Streptococcus agalactiae | Vaginal | Microbiology | LP376013-1 | 1 |
| Streptococcus.beta-hemolytic | Throat | Microbiology | LP376018-0 | 1 |
| Streptococcus.beta-hemolytic | XXX | Microbiology | LP376019-8 | 1 |
| Suberate | LP18454-6 | 1 |
| Suberate | Urine | Chemistry - non-challenge | LP386360-4 | 1 |
| Suberylcarnitine (C8-DC) | DBS | Chemistry - non-challenge | LP381753-5 | 1 |
| Suberylcarnitine (C8-DC) | Serum or Plasma | Chemistry - non-challenge | LP381756-8 | 1 |
| Succinate | Serum or Plasma | Chemistry - non-challenge | LP385620-2 | 1 |
| Succinate | Urine | Chemistry - non-challenge | LP385621-0 | 1 |
| Succinate cytochrome C reductase | LP33250-9 | 1 |
| Succinate cytochrome C reductase | Tissue and Smears | Chemistry - non-challenge | LP383233-6 | 1 |
| Succinate dehydrogenase | LP33247-5 | 1 |
| Succinate dehydrogenase | Tissue and Smears | Chemistry - non-challenge | LP383235-1 | 1 |
| Succinylacetone | DBS | Chemistry - non-challenge | LP385831-5 | 1 |
| Succinylacetone | Urine | Chemistry - non-challenge | LP385834-9 | 1 |
| Succinyladenosine | Cerebral spinal fluid | Chemistry - non-challenge | LP383542-0 | 1 |
| Succinyladenosine | Serum or Plasma | Chemistry - non-challenge | LP383543-8 | 1 |
| Succinylaminoimidazole carboxamide riboside | Cerebral spinal fluid | Chemistry - non-challenge | LP383545-3 | 1 |
| Succinylaminoimidazole carboxamide riboside | Serum or Plasma | Chemistry - non-challenge | LP383546-1 | 1 |
| Succinylaminoimidazole carboxamide riboside | Urine | Chemistry - non-challenge | LP383547-9 | 1 |
| Sucrase | LP18580-8 | 1 |
| Sucrase | Small intestine Tissue | Chemistry - non-challenge | LP383239-3 | 1 |
| Sugars and polyols pattern | LP173716-4 | 1 |
| Sugars and polyols pattern | Urine | Chemistry - non-challenge | LP385645-9 | 1 |
| Sulfatides | LP32680-8 | 1 |
| Sulfatides | Urine | Chemistry - non-challenge | LP386371-1 | 1 |
| Sulfhemoglobin | LP16490-2 | 1 |
| Sulfhemoglobin | Blood | Chemistry - non-challenge | LP383407-6 | 1 |
| Sulfocysteine | Cerebral spinal fluid | Chemistry - non-challenge | LP384359-8 | 1 |
| Sulfocysteine | Serum or Plasma | Chemistry - non-challenge | LP384360-6 | 1 |
| Sulfocysteine | Urine | Chemistry - non-challenge | LP430617-3 | 1 |
| Tacrolimus | Blood | Drug toxicology | LP390596-7 | 1 |
| Tacrolimus | Serum or Plasma | Drug toxicology | LP390598-3 | 1 |
| Target cells | LP14577-8 | 1 |
| Target cells | Blood | Hematology and Cell counts | LP393431-4 | 1 |
| Taurine | Amniotic fluid | Chemistry - non-challenge | LP384362-2 | 1 |
| Taurine | Cerebral spinal fluid | Chemistry - non-challenge | LP384365-5 | 1 |
| Taurine | Serum or Plasma | Chemistry - non-challenge | LP384367-1 | 1 |
| Taurochenodeoxycholate | LP411039-3 | 1 |
| Taurochenodeoxycholate | Serum or Plasma | Chemistry - non-challenge | LP416982-9 | 1 |
| Taurocholate | LP411038-5 | 1 |
| Taurocholate | Serum or Plasma | Chemistry - non-challenge | LP416983-7 | 1 |
| Taurodeoxycholate | LP411032-8 | 1 |
| Taurodeoxycholate | Serum or Plasma | Chemistry - non-challenge | LP416984-5 | 1 |
| Taurohyodeoxycholate | LP411031-0 | 1 |
| Taurohyodeoxycholate | Serum or Plasma | Chemistry - non-challenge | LP416985-2 | 1 |
| Taurolithocholate | LP411030-2 | 1 |
| Taurolithocholate | Serum or Plasma | Chemistry - non-challenge | LP416986-0 | 1 |
| Tauroursodeoxycholate | LP411029-4 | 1 |
| Tauroursodeoxycholate | Serum or Plasma | Chemistry - non-challenge | LP416981-1 | 1 |
| TCRB gene rearrangements | LP19781-1 | 1 |
| TCRB gene rearrangements | Blood or Tissue | Rearrangements | LP410300-0 | 1 |
| TCRB gene+TCRD gene+TCRG gene rearrangements | LP96328-7 | 1 |
| Testosterone.free+weakly bound | LP15881-3 | 1 |
| Testosterone.free+weakly bound | Serum or Plasma | Chemistry - non-challenge | LP381182-7 | 1 |
| Tetradecadienoate (C14:2) | Red Blood Cells | Chemistry - non-challenge | LP382157-8 | 1 |
| Tetradecadienoate (C14:2) | Serum or Plasma | Chemistry - non-challenge | LP382158-6 | 1 |
| Tetradecadienoylcarnitine (C14:2) | DBS | Chemistry - non-challenge | LP381864-0 | 1 |
| Tetradecadienoylcarnitine (C14:2) | Serum or Plasma | Chemistry - non-challenge | LP381867-3 | 1 |
| Tetradecanoylcarnitine (C14) | DBS | Chemistry - non-challenge | LP381831-9 | 1 |
| Tetradecanoylcarnitine (C14) | Serum or Plasma | Chemistry - non-challenge | LP381834-3 | 1 |
| Tetradecenoylcarnitine (C14:1) | Serum or Plasma | Chemistry - non-challenge | LP381851-7 | 1 |
| Tetrahydrobiopterin | LP31556-1 | 1 |
| Tetrahydrobiopterin | Cerebral spinal fluid | Chemistry - non-challenge | LP384315-0 | 1 |
| Tetrahydrocannabinol | Meconium | Drug toxicology | LP389645-5 | 1 |
| Tetrahydrofolate | Cerebral spinal fluid | Chemistry - non-challenge | LP385220-1 | 1 |
| Thallium | LP16837-4 | 1 |
| Thallium | Blood | Drug toxicology | LP388480-8 | 1 |
| Theophylline | LP16288-0 | 1 |
| Theophylline | Serum or Plasma | Drug toxicology | LP391498-5 | 1 |
| Threonine | Amniotic fluid | Chemistry - non-challenge | LP384371-3 | 1 |
| Threonine | Cerebral spinal fluid | Chemistry - non-challenge | LP384374-7 | 1 |
| Threonine | DBS | Chemistry - non-challenge | LP384372-1 | 1 |
| Threonine | Serum or Plasma | Chemistry - non-challenge | LP384375-4 | 1 |
| Thymidine | Cerebral spinal fluid | Chemistry - non-challenge | LP383553-7 | 1 |
| Thymidine | Serum or Plasma | Chemistry - non-challenge | LP383554-5 | 1 |
| Thymine | Cerebral spinal fluid | Chemistry - non-challenge | LP383570-1 | 1 |
| Thymine | Serum or Plasma | Chemistry - non-challenge | LP383571-9 | 1 |
| Thyroglobulin | Serum or Plasma | Chemistry - non-challenge | LP381503-4 | 1 |
| Thyroglobulin | Tissue FNA | Chemistry - non-challenge | LP381504-2 | 1 |
| Thyroglobulin heterophile Ab interference | LP434118-8 | 1 |
| Thyroglobulin heterophile Ab interference | Serum | Chemistry - non-challenge | LP436909-8 | 1 |
| Thyroglobulin recovery | LP34646-7 | 1 |
| Thyroglobulin recovery | Serum or Plasma | Chemistry - non-challenge | LP416962-1 | 1 |
| Thyroid stimulating immunoglobulins | LP15892-0 | 1 |
| Thyroid stimulating immunoglobulins | Serum | Chemistry - non-challenge | LP381505-9 | 1 |
| Thyroxine | Serum or Plasma | Chemistry - non-challenge | LP381510-9 | 1 |
| Thyroxine binding globulin | LP15897-9 | 1 |
| Thyroxine binding globulin | Serum or Plasma | Chemistry - non-challenge | LP381516-6 | 1 |
| Thyroxine.albumin bound | Serum or Plasma | Chemistry - non-challenge | LP381511-7 | 1 |
| Thyroxine.prealbumin bound | LP18513-9 | 1 |
| Thyroxine.prealbumin bound | Serum or Plasma | Chemistry - non-challenge | LP381512-5 | 1 |