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ARUP’s Commitment
On November 28, 2017, the FDA issued a Safety Communication warning that “Biotin May Interfere with Lab Tests.”
ARUP sent an announcement to clients regarding the original FDA Safety Communication warning on December 6, 2017. ARUP has also identified the tests that can potentially be affected by high levels of biotin.
On November 5, 2019, the FDA issued an updated Safety Communication “Update: The FDA Warns that Biotin May Interfere with Lab Tests: FDA Safety Communication.” Read more here.
Please be assured that ARUP responds to FDA notifications in a manner that is consistent with our commitment to quality and patient care. ARUP continues to encourage health care providers to interpret associated clinical results for patients that are taking high levels of biotin with caution.
For additional questions, please contact ARUP Client Services, (800) 522-2787, and refer to the key word: Biotin Interference.
About Biotin
Biotin (vitamin B7) is a water-soluble B vitamin that helps turn carbs, fats, and proteins into energy. The recommended daily intake (RDI) varies based on age (adults: 30 µg/day). Biotin can be found in various foods, as well as multivitamins, prenatal vitamins, and dietary supplements.2 However, dietary supplements marketed for hair, skin, and nail growth may contain biotin concentrations up to 650 times (5–10 mg) the RDI. High dose supplementation of biotin (>10 mg/day) may be recommended for patients with certain inherited metabolic deficiencies/diseases or conditions such as multiple sclerosis (MS).3
Potential Effect(s) on Testing
While standard intake levels of biotin do not typically cause interference, higher levels may cause significant interference with certain immunoassays that use biotin-streptavidin technology and affect corresponding test results.1,3 This interference can cause false highs and false lows, potentially leading to misdiagnosis.
Patients may be unaware they are taking higher-than-recommended levels of biotin, so it is important for physicians to be diligent in obtaining a full list of supplements for testing accuracy. This information should then be communicated with the lab(s) conducting the test(s). For suspicious or inconsistent patient results, biotin interference may be considered. Consult with testing laboratory to discuss potential impact.
Additional Resources
References
- FDA in Brief: FDA reminder about the potential for biotin interference 2019.
- National Institutes of Health. Biotin fact sheet for consumers.
- Roche Diagnostics. Biotin facts.
Test List
Last updated: November 2021
| User's Guide Name | Test Mnemonic | Test Order Number |
|---|---|---|
| ACTH by Immunohistochemistry | ACTH IHC | 2003427 |
| Adenovirus by Immunohistochemistry | ADENOV | 2003430 |
| Adrenocorticotropic Hormone | ACTH | 70010 |
| Adrenocorticotropic Hormone, IVC1 | ACTH IVC1 | 70279 |
| Adrenocorticotropic Hormone, LP1 | ACTH LP1 | 70300 |
| Adrenocorticotropic Hormone, RP1 | ACTH RP1 | 70311 |
| AE1,3 (Keratin) by Immunohistochemistry | AE1,3 IHC | 2003433 |
| ALK1 by Immunohistochemistry | ALK1 IHC | 2003439 |
| ALK (D5F3) with Interpretation by Immunohistochemistry | ALKD5F3 IP | 2007324 |
| Alpha-1 AT by Immunohistochemistry | A1 AT IHC | 2003424 |
| Alpha-1-Fetoprotein (AFP) by Immunohistochemistry | AFP IHC | 2003436 |
| Alpha-Synuclein by Immunohistochemistry | A-SYN IHC | 2003419 |
| Androgen Receptor by Immunohistochemistry | AR IHC | 3002791 |
| Aquaporin-4 Receptor Antibody | AQP4 | 2003036 |
| Aquaporin-4 Receptor Antibody by ELISA with Reflex to Aquaporin-4 Receptor Antibody, IgG by IFA | AQP4 R | 2013327 |
| Arginase 1 by Immunohistochemistry | ARG1 IHC | 2011890 |
| ATRX by Immunohistochemistry | ATRX IHC | 2014499 |
| BAf47/Ini-1 by Immunohistochemistry | BAf47 IHC | 2003448 |
| BAP1 by Immunohistochemistry | BAP1 IHC | 3004244 |
| Beta-hCG, Quantitative (Tumor Marker) | BHCG TM | 70029 |
| Beta-hCG, Quantitative (Tumor Marker), CSF | BHCG CSF | 20730 |
| BCL-2 by Immunohistochemistry | BCL-2 IHC | 2004513 |
| BCL-6 (CD19) by Immunohistochemistry | BCL-6 IHC | 2003457 |
| BCL10 by Immunohistochemistry | BCL10 IHC | 3003393 |
| BER-EP4 by Immunohistochemistry | BEREP4 IHC | 2003463 |
| Beta-Catenin 1 by Immunohistochemistry | B-CAT1 IHC | 2003454 |
| BF-1 by Immunohistochemistry | BF-1 IHC | 2003466 |
| BOB-1 by Immunohistochemistry | BOB-1 IHC | 2003442 |
| Brachyury by Immunohistochemistry | BRACHY IHC | 3003824 |
| Breast Carcinoma b72.3 by Immunohistochemistry | B72.3 IHC | 2003445 |
| C1-Esterase Inhibitor Functional | C1 INH F | 50141 |
| C-1-Esterase Inhibitor Panel | C1 INH PAN | 50139 |
| C4D by Immunohistochemistry | C4D IHC | 2003475 |
| CAIX (CA9) by Immunohistochemistry | CAIX IHC | 3001697 |
| Calcitonin by Immunohistochemistry | CALCIT IHC | 2003481 |
| Caldesmon by Immunohistochemistry | CALDES IHC | 2003484 |
| Calponin by Immunohistochemistry | CALPON IHC | 2003487 |
| Calretinin by Immunohistochemistry | CALRET IHC | 2003490 |
| Cancer Antigen 125 | CA125 | 80462 |
| Cancer Antigen-Breast (CA 15-3) | CA-BREAST | 80464 |
| Cancer Antigen-GI (CA 19-9) | CA-GI | 80461 |
| Cancer Antigen-GI (CA 19-9), Body Fluid | CA-GI FL | 20746 |
| Carcinoembryonic Antigen | CEA | 80080 |
| Carcinoembryonic Antigen, Fluid | CEA FL | 20742 |
| CD10 by Immunohistochemistry | CD10 IHC | 2003523 |
| CD117, C-KIT by Immunohistochemistry | CD117 IHC | 2003806 |
| CD123 by Immunohistochemistry | CD123 IHC | 2003809 |
| CD138 by Immunohistochemistry | CD138 IHC | 2003812 |
| CD14 by Immunohistochemistry | CD14 IHC | 2003526 |
| CD15 by Immunohistochemistry | CD15 IHC | 2003529 |
| CD163 by Immunohistochemistry | CD163 IHC | 2003815 |
| CD19 by Immunohistochemistry | CD19 IHC | 2005114 |
| CD1a by Immunohistochemistry | CD1A IHC | 2003502 |
| CD2 by Immunohistochemistry | CD2 IHC | 2003505 |
| CD20 by Immunohistochemistry | CD20 IHC | 2003532 |
| CD200 by Immunohistochemistry | CD200 IHC | 2012844 |
| CD21 (Dendritic Cell) by Immunohistochemistry | CD21 IHC | 2003535 |
| CD23 by Immunohistochemistry | CD23 IHC | 2003541 |
| CD25 by Immunohistochemistry | CD25 IHC | 2003544 |
| CD3 by Immunohistochemistry | CD3 IHC | 2003508 |
| CD30 by Immunohistochemistry | CD30 IHC | 2003547 |
| CD31 by Immunohistochemistry | CD31 IHC | 2003550 |
| CD33 by Immunohistochemistry | CD33 IHC | 2003553 |
| CD34, QBEnd/10 by Immunohistochemistry | CD34 IHC | 2003556 |
| CD35 by Immunohistochemistry | CD35 IHC | 2003559 |
| CD4 by Immunohistochemistry | CD4 IHC | 2003511 |
| CD43, L60 (Leu 22) by Immunohistochemistry | CD43 IHC | 2003568 |
| CD45 by Immunohistochemistry | CD45 IHC | 2003574 |
| CD5 by Immunohistochemistry | CD5 IHC | 2033514 |
| CD52 by Immunohistochemistry | CD52 IHC | 2003586 |
| CD56, NCAM by Immunohistochemistry | CD56 IHC | 2003589 |
| CD61 (Platelet Glycoprotein IIIA) by Immunohistochemistry | CD61 IHC | 2003595 |
| CD68 (Kp1) by Immunohistochemistry | CD68 IHC | 2003598 |
| CD7 by Immunohistochemistry | CD7 IHC | 2003517 |
| CD71 by Immunohistochemistry | CD71 IHC | 3003704 |
| CD79A by Immunohistochemistry | CD79A IHC | 2003800 |
| CD8 by Immunohistochemistry | CD8 IHC | 2003520 |
| CDK4 by Immunohistochemistry | CDK4 IHC | 2005534 |
| CDX2 by Immunohistochemistry | CDX2 IHC | 2003821 |
| CEA Mono by Immunohistochemistry | CEA M IHC | 2003824 |
| Chromogranin by Immunohistochemistry | CHROMO IHC | 2003830 |
| Chymotrypsin by Immunohistochemistry | CHYMO IHC | 3003423 |
| CMV by Immunohistochemistry | CMV IHC | 2003833 |
| C-MYC by Immunohistochemistry | CMYC IHC | 2008317 |
| Collagen IV by Immunohistochemistry | COLL 4 IHC | 2003839 |
| Cotinine Screen, Urine | COTININE | 2007081 |
| COVID-19 IgG (Spike), Semi-Quantitative by CIA | COV19G SQ | 3003648 |
| C-Telopeptide, Beta-Cross-Linked, Serum | CTX | 70416 |
| CXCL 13 by Immunohistochemistry | CXCL13 IHC | 2008622 |
| Cyclin D1 SP4 by Immunohistochemistry | CYCSP4 IHC | 2003842 |
| CYFRA 21-1 (Cytokeratin 19 Fragment), Serum | CYFRA | 81344 |
| Cytokeratin 20 (CK 20) by Immunohistochemistry | CYTO20 IHC | 2003848 |
| Cytokeratin 5/6 by Immunohistochemistry | CYTO56 IHC | 2003851 |
| Cytokeratin 7 by Immunohistochemistry | CYTO 7 IHC | 2003854 |
| Cytokeratin LMW (CAM 5.2) by Immunohistochemistry | IHC CAM5.2 | 2003493 |
| Cytokine Panel 13, CSF | CYT13 CSF | 3003259 |
| Cytokine Panel 13, Serum | CYT 12 SE | 51394 |
| Cytokine Panel 13, Plasma | CYT13 PLA | 3002601 |
| Cytokine Panel, Monokines, Plasma | CYT MON P | 3002616 |
| Cytokine Panel, Monokines, Serum | CYT MON SE | 51524 |
| Cytokine Panel, TH, Serum | CYT TH1 SE | 51408 |
| Cytokine Panel, TH1, Plasma | CYT TH1 P | 3002617 |
| Cytokine Panel, TH1, Plasma | CYT TH2 P | 3002627 |
| Cytokine Panel, TH2, Serum | CYT TH2 SE | 51518 |
| D2-40 by Immunohistochemistry | D2-40 IHC | 2003857 |
| DBA 44 (Hairy Cell) by Immunohistochemistry | DBA 44 IHC | 2003860 |
| Dehydroepiandrosterone Sulfate, Serum | DHEAS | 70040 |
| Desmin by Immunohistochemistry | DESMIN IHC | 2003863 |
| DOG-1 by Immunohistochemistry | DOG1 IHC | 2010168 |
| E-Cadherin by Immunohistochemistry | ECADH IHC | 2000708 |
| Epithelial Membrane Antigen (EMA) by Immunohistochemistry | EMA IHC | 2000711 |
| ERA (Moc-31) by Immunohistochemistry | ERA IHC | 2003875 |
| ERG by Immunohistochemistry | ERG IHC | 2012555 |
| Estrogen Receptor (ER) by Immunohistochemistry | ER IHC | 2004516 |
| Ewing Sarcoma (O13) by Immunohistochemistry | O13 IHC | 2004055 |
| Factor XIII by Immunohistochemistry | FAC 13 IHC | 2003878 |
| Fetal Fibronectin | FFN | 82024 |
| FIBRINOGEN by IF Technical Only (Bill Only, for Internal Use Only) | FIBR IFT | 2005397 |
| Follicle Stimulating Hormone, Serum | FSH | 70055 |
| FSH by Immunohistochemistry | FSH IHC | 2010166 |
| Fumarate Hydratase by Immunohistochemistry | FUMHYD IHC | 3001416 |
| Gastrin | GAST | 70075 |
| Gastrin by Immunohistochemistry | GASTRI IHC | 2003896 |
| Gastrin, 1 Minute | GAST 1 | 2012636 |
| Gastrin, 10 Minute | GAST 10 | 2012734 |
| Gastrin, 2 Minute | GAST 2 | 2012638 |
| Gastrin, 30 Minute | GAST 30 | 2012736 |
| Gastrin, 5 Minute | GAST 5 | 2012732 |
| Gastrin, Baseline | GAST BASE | 2012738 |
| Glial Fibrillary Acidic Protein (GFAP) by Immunohistochemistry | GFAP IHC | 2003899 |
| GLUT-1 by Immunohistochemistry | GLUT-1 IHC | 2003905 |
| Glycophorin A by Immunohistochemistry | GLYC A IHC | 2003908 |
| Glypican 3 by Immunohistochemistry | GLYP3 IHC | 2011925 |
| Granzyme B by Immunohistochemistry | GRANZB IHC | 2007173 |
| H3K27M by Immunohistochemistry | H3K27M IHC | 3004370 |
| H3K27me3 by Immunohistochemistry | H3K27me3 IHC | 3004364 |
| Helicobacter pylori by Immunohistochemistry | HPYLOR IHC | 2003941 |
| Hepatitis A Virus Antibodies (Total) | HAVAB | 20591 |
| Hepatitis A Virus Antibody, IgM | HAVABM | 20093 |
| Hepatitis A Virus Panel | HEP A PAN | 20597 |
| Hepatitis B Virus (HBV) Perinatal Exposure Follow-up by CIA, Panel | HBV PAN PN | 2014285 |
| Hepatitis B Virus Panel, Chronic with Reflex to HBsAg Confirmation | HEPCHRONIC | 20454 |
| Hepatitis B Virus Surface Antibody | HBSAB | 20090 |
| Hepatitis B Virus Surface Antigen with Reflex to Confirmation | HBSAG | 20089 |
| Hepatitis B Virus Surface Antigen with Reflex to Confirmation, Prenatal | HBSAG PN | 2007573 |
| Hepatocyte Specific Antigen (HSA) by Immunohistochemistry | HEP SA IHC | 2003923 |
| HercepTest (stain only) by Immunohistochemistry | HERCEP IHC | 2007332 |
| Herpes Simplex Virus (HSV) Types I/II Cocktail by Immunohistochemistry | HSV IHC | 3000101 |
| HGAL by Immunohistochemistry | HGAL IHC | 3004201 |
| HMB 45 (Melanoma Specific A) by Immunohistochemistry | HMB 45 IHC | 2003935 |
| HMB45 RED by Immunohistochemistry | HMB45R IHC | 3003741 |
| HNF-1 by Immunohistochemistry | HNF1B IHC | 3001791 |
| Human Chorionic Gonadotropin (Beta-hCG) by Immunohistochemistry | HCG IHC | 2003920 |
| Human Epididymis Protein 4 (HE4) | HE4 | 2003020 |
| Human Growth Hormone by Immunohistochemistry | HGH IHC | 2003929 |
| HHV8 by Immunohistochemistry | HHV8 IHC | 2003932 |
| Human Placental Lactogen (HPL) by Immunohistochemistry | HPL IHC | 2003938 |
| IDH1 R132H Mutation by Immunohistochemistry | IDH1 IHC | 2005857 |
| Immunoglobulin D (IgD) by Immunohistochemistry | IGD IHC | 2003960 |
| Immunoglobulin G (IgG) by Immunohistochemistry | IGG IHC | 2003963 |
| Immunoglobulin G4 (IgG4) by Immunohistochemistry | IGG4 IHC | 2005844 |
| Inhibin by Immunohistochemistry | INHIBI IHC | 2003969 |
| Interferon gamma, Plasma | IFNG PLA | 3002628 |
| Interferon gamma, Serum | IFNG DO | 51531 |
| Interleukin 1 beta, Plasma | IL1B PLA | 3002629 |
| Interleukin 1 beta, Serum | IL1B DO | 51536 |
| Interleukin 10, Plasma | IL10 PLA | 3002623 |
| Interleukin 10, Serum | IL10 DO | 51534 |
| Interleukin 12, Plasma | IL12 PLA | 3002624 |
| Interleukin 12, Serum | IL12 DO | 51530 |
| Interleukin 13, Plasma | IL13 PLA | 3002625 |
| Interleukin 13, Serum | IL13 DO | 51535 |
| Interleukin 17, Plasma | IL17 PLA | 3002626 |
| Interleukin 17, Serum | IL17 | 2013115 |
| Interleukin 2, Plasma | IL2 PLA | 3002630 |
| Interleukin 2, Serum | IL2 DO | 51588 |
| Interleukin 2 Receptor, Soluble, CSF | IL2R CSF | 3003261 |
| Interleukin 2 Receptor, Soluble, Plasma | IL2R PLA | 3002631 |
| Interleukin 2 Receptor, Soluble, Serum | IL2R DO | 51529 |
| Interleukin 4, Plasma | IL4 PLA | 3002622 |
| Interleukin 4, Serum | IL4 DO | 51532 |
| Interleukin 5, Plasma | IL5 PLA | 3002621 |
| Interleukin 5, Serum | IL5 DO | 51533 |
| Interleukin 6, CSF | IL6 CSF | 3003260 |
| Interleukin 6, Plasma | IL6 PLA | 3002620 |
| Interleukin 6, Serum | IL6 DO | 51537 |
| Interleukin 8, Plasma | IL8 PLA | 3002619 |
| Interleukin 8, Serum | IL8 DO | 51538 |
| IRF4 by Immunohistochemistry | IRF4 IHC | 2003975 |
| Kappa Light Chains by Immunohistochemistry | KAPPA IHC | 2000746 |
| Keratin 903 (K903) High Molecular Weight by Immunohistochemistry | K903 IHC | 2003978 |
| Lambda Light Chains by Immunohistochemistry | LAMBDA IHC | 2000751 |
| Laminin by Immunohistochemistry | LAMIN IHC | 2001677 |
| Langerin by Immunohistochemistry | LANGER IHC | 2013802 |
| Luteinizing Hormone and Follicle Stimulating Hormone | LH/FSH | 70193 |
| Luteinizing Hormone (LH) by Immunohistochemistry | LH IHC | 2010164 |
| Luteinizing Hormone, Serum | LH | 70093 |
| Lysozyme (Muramidase) by Immunohistochemistry | LYSOZY IHC | 2003990 |
| Mannose Binding Lectin | MBL | 51692 |
| Mast Cell Tryptase by Immunohistochemistry | MASTCT IHC | 2000757 |
| Melan A by Immunohistochemistry | MELANA IHC | 2000758 |
| Melan A RED by Immunohistochemistry | MELA R IHC | 3003729 |
| Mib-1 (Ki-67) by Immunohistochemistry | Mib1 IHC | 2004519 |
| MITF by Immunohistochemistry | MITF IHC | 2011998 |
| Muc-1 by Immunohistochemistry | MUC-1 IHC | 2004002 |
| Muc-4 by Immunohistochemistry | MUC-4 IHC | 2004008 |
| Muscle-Specific Actin (MSA) by Immunohistochemistry | MUSA IHC | 2004011 |
| Myeloperoxidase (MPO) by Immunohistochemistry | MYELOP IHC | 2004014 |
| Myogenin (MYF4) by Immunohistochemistry | MYF4 IHC | 2004017 |
| Myoglobin by Immunohistochemistry | MYOGL IHC | 2004031 |
| Myoglobin, Serum | MYOG-S | 20224 |
| Myoglobin, Urine | MYOG-U | 20223 |
| Myosin by Immunohistochemistry | MYOSIN IHC | 2004034 |
| Napsin A by Immunohistochemistry | NAPSIN IHC | 2008716 |
| NeuN by Immunohistochemistry | NEUN IHC | 2004046 |
| Neurofilament by Immunohistochemistry | NEUROF IHC | 2004049 |
| Neuron Specific Enolase, Polyclonal (NSE P) by Immunohistochemistry | NSE IHC | 2004052 |
| NKX2.2 by Immunohistochemistry | NKX2.2 IHC | 3004320 |
| NUT by Immunohistochemistry | IHC NUT | 3002783 |
| Octamer Transcription Factor-2 (OCT-2) IHC by Immunohistochemistry | OCT-2 IHC | 2004061 |
| Octamer Transcription Factor-3 and -4 (Oct 3/4) by Immunohistochemistry | OCT3/4 IHC | 2004058 |
| Osteocalcin by Electrochemiluminescent Immunoassay | OSTEO NMID | 20728 |
| p16 by Immunohistochemistry | P16 IHC | 2004064 |
| p40 by Immunohistochemistry | P40 IHC | 2010142 |
| p53 by Immunohistochemistry | P53 IHC | 2004522 |
| P501s by Immunohistochemistry | P501S IHC | 3001894 |
| P504S by Immunohistochemistry | P504S IHC | 2000774 |
| p57/Kip2 by Immunohistochemistry | p57 IHC | 2005542 |
| p63 by Immunohistochemistry | P63 IHC | 2004073 |
| Parathyroid Hormone, Fine Needle Aspiration (FNA) | PTH FNA | 2001491 |
| Parathyroid Hormone, Intact | PTH-INT | 70346 |
| Parathyroid Hormone, Intact with Calcium | PTHI | 70172 |
| PAX5 by Immunohistochemistry | PAX5 IHC | 2004082 |
| PAX8 by Immunohistochemistry | PAX8 IHC | 2010787 |
| PD-1 by Immunohistochemistry | PD1 IHC | 2004085 |
| PD-L1 by Immunohistochemistry | PD-L1 IHC | 2011158 |
| PHF-Tau by Immunohistochemistry | PHFTAU IHC | 2004094 |
| PIN4 (Prostate Triple Stain) by Immunohistochemistry | PIN4 IHC | 2010045 |
| Placental Alkaline Phosphatase (PLAP) by Immunohistochemistry | PLAP IHC | 2000782 |
| Prenatal Reflexive Panel | PRENATAL A | 95044 |
| proBrain Natriuretic Peptide, NT | PRO BNP | 50083 |
| Progesterone Receptor (PR) by Immunohistochemistry | PR IHC | 2004525 |
| Prolactin by Immunohistochemistry | PROLAC IHC | 2004109 |
| Prostate Specific Antigen by Immunohistochemistry | PSA IHC | 2004112 |
| Prostate Specific Antigen, Free Percentage (Includes Free PSA and Total PSA) | PSA FP | 80206 |
| Prostate Specific Antigen, Total | PSA | 70121 |
| Prostate Specific Antigen, Total - Medicare Screening | PSA SCN | 70234 |
| Prostate Specific Antigen, Total with Reflex to Free PSA (Includes Free Percentage) | TPSAR | 80264 |
| Prostate Specific Antigen, Ultrasensitive | PSA ULTRA | 98581 |
| Prostatic Acid Phosphatase (PAP) by Immunohistochemistry | PAP IHC | 2004079 |
| PTH by Immunohistochemistry | PTH IHC | 2004118 |
| RCC by Immunohistochemistry | RCC IHC | 2004124 |
| Reflexed to Free PSA (Includes Free Percentage) | BILL PSAFR | 50338 |
| Risk of Ovarian Malignancy Algorithm | ROMA | 2012618 |
| ROS1 with Interpretation by Immunohistochemistry | ROS 1 IP | 2008414 |
| S100 Protein by Immunohistochemistry | S100 IHC | 2004127 |
| S100B CSF | S100B CSF | 2013358 |
| S-100B Protein, Serum | S 100B | 2001766 |
| S100 RED by Immunohistochemistry | S100 R IHC | 3003733 |
| SALL4 by Immunohistochemistry | SALL4 IHC | 2005432 |
| Sex Hormone Binding Globulin | SHBG | 99375 |
| SMAD4 by Immunohistochemistry | SMAD4 IHC | 2006401 |
| Smooth Muscle Actin (SMA) by Immunohistochemistry | SMA IHC | 2004130 |
| SOX10 by Immunohistochemistry | SOX10 IHC | 3001562 |
| SOX10 RED by Immunohistochemistry | SOX10R IHC | 3003737 |
| SOX11 by Immunohistochemistry | SOX11 IHC | 2012561 |
| STAT 6 by Immunohistochemistry | STAT6 IHC | 2013251 |
| Surgical Pathology Tissue | SP REQUEST | 8090010 |
| SV40 by Immunohistochemistry | SV40 IHC | 2004137 |
| Synaptophysin by Immunohistochemistry | SYNAPT IHC | 2004139 |
| T3 Uptake | T3 UP | 70135 |
| TCL1 by Immunohistochemistry | TCL1 IHC | 3003595 |
| TCR-delta by Immunohistochemistry | TCR D IHC | 3001896 |
| TDP43 by Immunohistochemistry | TDP43 IHC | 3003407 |
| TdT by Immunohistochemistry | TDT IHC | 2004142 |
| Testosterone Free, Adult Male | FREE T2 | 70111 |
| Testosterone, Adult Male | TESTOS | 70130 |
| Testosterone, Bioavailable and Sex Hormone Binding Globulin (Includes Total Testosterone), Adult Male | BIO T | 70102 |
| Testosterone, Free and Total (Includes Sex Hormone Binding Globulin), Adult Male | FREE T | 70109 |
| TFE3 by Immunohistochemistry | TFE3 IHC | 2010688 |
| Thyroglobulin Antibody | ATHYG | 50105 |
| Thyroglobulin by Immunohistochemistry | THYRO IHC | 2004145 |
| Thyroid Antibodies | THYRO | 50645 |
| Thyroid Peroxidase (TPO) Antibody | AMICR | 50075 |
| Thyroid Stimulating Hormone | TSH | 70145 |
| Thyroid Stimulating Hormone Receptor Antibody (TRAb) | TR AB | 2002734 |
| Thyroxine | T4 | 70140 |
| Thyroxine, Free (Free T4) | FT4 | 70138 |
| TIA-1 by Immunohistochemistry | TIA-1 IHC | 2004148 |
| Toll-Like Receptor Function | TLR | 51589 |
| Toxoplasmosis by Immunohistochemistry | TOXOPL IHC | 2004157 |
| Transforming Growth Factor beta, Plasma | TGFB PLA | 51690 |
| Transforming Growth Factor beta, Serum | TGFB SER | 51694 |
| Treponema Pallidum by Immunohistochemistry | TPALL IHC | 3001704 |
| Triiodothyronine, Free (Free T3) | FT3 | 70133 |
| Triiodothyronine, Total (Total T3) | T3 TOTAL | 70474 |
| Troponin T (cTnT) 5th Generation | CTNT | 3001831 |
| Trypsin by Immunohistochemistry | TRYPS IHC | 3003458 |
| TTF-1 by Immunohistochemistry | IHC TTF-1 | 2004166 |
| Tumor Necrosis Factor - alpha, Plasma | TNFA PLA | 3002618 |
| Tumor Necrosis Factor - alpha, Serum | TNFA DO | 51539 |
| Ubiquitin by Immunohistochemistry | UBIQUI IHC | 2004169 |
| Uroplakin-II by Immunohistochemistry | UROPII IHC | 3001149 |
| Vimentin by Immunohistochemistry | VIMENT IHC | 2004181 |
| WT-1 by Immunohistochemistry | WT-1 IHC | 2000810 |
