| DLCTU | D Lactate Urine | — |
| DLAC | D-Lactate, Plasma | Gas Chromatography Mass Spectrometry (GCMS) Stable Isotope Dilution Analysis |
| DPTER | D. pteronyssinus IgE | — |
| DDIMER | DDimer | Fluorescence Immunoassay |
| DMS2 | Dementia, Autoimmune/Paraneoplastic Evaluation, Serum | — |
| DMRL | Demerol (Meperidine) | — |
| DFVA | Dengue Fever Virus Ab, IgG & IgM | — |
| DPYC | Deoxypyridinoline Crosslinks | — |
| DERMP | Dermatomyositis Autoantibody Panel | — |
| DESI | Desipramine | — |
| DEXA | Dexamethasone | — |
| DHEA | DHEA (Dehydroepiandrosterone), Serum | — |
| DHES | DHEA Sulfate (Dehydroepiandrosterone Sulfate) | — |
| DIAZ | Diazepam (Valium) | — |
| DIC | DIC Screen | — |
| DIGO | Digoxin | Electrochemiluminescence Immunoassay |
| DPYD | Dihydropyrimidine Dehydrogenase (DPYD), 3 Variants | — |
| DHRP | Dihydrorhodamine (DHR) Flow PMA Test | — |
| DHT | Dihydrotestosterone | — |
| DHTFR | Dihydrotestosterone (DHT) Free, LC/MS/Dialysis | — |
| DCMPS | Dilated Cardiomyopathy Panel, Sequencing | — |
| TABP | Diphtheria & Tetanus Antibodies, IgG | — |
| DIPA | Diphtheria Antibody | — |
| DIPCU | Diphtheria Culture | — |
| DIBIL | Direct and Indirect Bilirubin | Photometric, Colormetric Diazo Method |
| DAT | Direct Antiglobulin (Direct Coombs) | — |
| DNAS | Dnase-B Antibody | — |
| DOGD | Dog Hair/Dander IgE | — |
| DNTHL | Donath Landsteiner | — |
| DBDNAC | Double Stranded DNA (dsDNA) Antibody, IgG by IFA | — |
| DOA9U | Drug Panel 9, Urine - Reflex to Conf/Quant | Qualitative Enzyme Multiplied Immunoassay Technique (EMIT)/Quantitative Gas Chromatography-Mass Spectrometry (GC-MS)/Quantitative Liquid Chromatography-Tandem Mass Spectrometry |
| DOA9 | Drugs of Abuse 9 Panel, Serum or Plasma | Qualitative Enzyme-Linked Immunosorbent Assay (ELISA) / Quantitative Gas Chromatography-Mass Spectrometry (GC-MS) / Quantitative Liquid Chromatography-Tandem Mass Spectrometry |
| DRS10 | Drugs of Abuse Screen 10 Panel, Chain of Custody | — |
| DRS7 | Drugs of Abuse Screen 7 Panel, Chain of Custody | — |
| TOX9 | Drugs of Abuse Screen 9 Panel, Urine | Fluorescence Immunoassay |
| ADNC | dsDNA (Double Stranded DNA) Antibody, IgG | Multiplex Flow Immunoassay |
