| Access Total T4 | 15099590816803 | Beckman Coulter Inc. | Class B | |
| Access Total T4 II | 15099590818258 | Beckman Coulter Inc. | Class B | |
| Access Total T4 II Reagent Pack | 15099590754488 | Beckman Coulter Inc. | Class B | |
| Access Total T4 Reagent Pack | 15099590225742 | Beckman Coulter Inc. | Class B | |
| ADVIA Centaur® T4 | 00630414177045 | Siemens Healthcare Diagnostics Inc. | Class B | |
| ADVIA Centaur® T4 | 00630414177052 | Siemens Healthcare Diagnostics Inc. | Class B | |
| AIA-PACK T4 CALIBRATOR SET | 04560189211803 | Tosoh Corporation | Unknown class | |
| AIA-PACK T4 SAMPLE DILUTING SOLUTION | 04560189211797 | Tosoh Corporation | Unknown class | |
| Alinity | 00380740131517 | Abbott Ireland Diagnostics Division | Class B | |
| Alinity | 00380740131524 | Abbott Ireland Diagnostics Division | Class B | |
| Alinity | 00380740173593 | Abbott Ireland Diagnostics Division | Class B | |
| Alinity | 00380740173609 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740129484 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740129491 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740129507 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740173623 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740173630 | Abbott Ireland Diagnostics Division | Class B | |
| ARCHITECT | 00380740173647 | Abbott Ireland Diagnostics Division | Class B | |
| Atellica IM Total Thyroxine (T4) | 00630414599977 | Siemens Healthcare Diagnostics Inc. | Class B | |
| Atellica IM Total Thyroxine (T4) | 00630414599984 | Siemens Healthcare Diagnostics Inc. | Class B | |
| AURYX 90 T4 Reagent Kit | 05907514601370 | PZ CORMAY Spółka Akcyjna | Unknown class | |
| AURYX 90 T4 Reagent Kit | 05907514601387 | PZ CORMAY Spółka Akcyjna | Unknown class | |
| CEDIA T4 Assay | 00884883005655 | Microgenics Corporation | Unknown class | |
| CL AIA-PACK T4 ADJUSTER SET | 14562185395478 | Tosoh Corporation | Unknown class | |
| CL AIA-PACK T4 TEST CUP | 14562185395461 | Tosoh Corporation | Unknown class | |
| Diagnostic Kit for Free T4 | 04260163315854 | MP Biomedicals Germany GmbH | Unknown class | |
| Diagnostic Kit for Interleukin-6 | 04260163315762 | MP Biomedicals Germany GmbH | Unknown class | |
| Diagnostic Kit for T4 | 04260163315847 | MP Biomedicals Germany GmbH | Unknown class | |
| Diagnostic Kit for T4 (Time-resolved Fluorescence Immunochromatographic Assay) | 06974521000754 | Shenzhen Superbio Technology Co.,Ltd. | Unknown class | |
| Dimension Thyroxine Flex reagent cartridge | 00842768005626 | Siemens Healthcare Diagnostics Inc. | Unknown class | |
| Dimension Vista Thyroxine Flex reagent cartridge | 00842768015434 | Siemens Healthcare Diagnostics Inc. | Unknown class | |
| DRI Thyroxine (T4) | 00884883003446 | Microgenics Corporation | Unknown class | |
| DRI Thyroxine (T4) | 00884883004177 | Microgenics Corporation | Unknown class | |
| DRI Thyroxine (T4) Calibrator Kit | 00884883005549 | Microgenics Corporation | Unknown class | |
| DS-EIA-THYROID-T4 TOTAL | 04605979401634 | RPC Diagnostic Systems Ltd. | Unknown class | |
| FIA Go T4 Kit | 06971225936297 | Goldsite Diagnostics Inc. | Unknown class | |
| Finecare | 06933289810340 | Guangzhou Wondfo Biotech Co., Ltd. | Unknown class | |
| HOKAPI™ T4 | 06939716404816 | Suzhou Hokapi Biomedical Engineering Co., Ltd.. | Class B | |
| HOKAPI™ T4 | 06939716404823 | Suzhou Hokapi Biomedical Engineering Co., Ltd.. | Class B | |
| HOKAPI™ T4 | 06971390435311 | Suzhou Hokapi Biomedical Engineering Co., Ltd.. | Class B | |
| HOKAPI™ T4 | 06971390435328 | Suzhou Hokapi Biomedical Engineering Co., Ltd.. | Class B | |
| iFlash-T4 | 06925912715382 | SHENZHEN YHLO BIOTECH CO., LTD. | Class B | |
| iFlash-T4 | 06925912718512 | SHENZHEN YHLO BIOTECH CO., LTD. | Class B | |
| iFlash-T4 | 06925912723080 | SHENZHEN YHLO BIOTECH CO., LTD. | Class B | |
| IMMULITE 2000 Total T4 | 00630414966038 | Siemens Healthcare Diagnostics Products Ltd. | Class B | |
| IMMULITE 2000 Total T4 | 00630414972992 | Siemens Healthcare Diagnostics Products Ltd. | Class B | |
| iStar-T4 | 06973224892420 | Shenzhen Drawray Biotech Co., Ltd. | Class B | |
| Kemilo T4 Kit | 06971225935535 | Goldsite Diagnostics Inc. | Unknown class | |
| LIAISON® T4 | 08056771200271 | DiaSorin Italia S.p.A. | Unknown class | |
| MAGICL T4 (CLIA) | 06954414798050 | Getein Biotech, Inc. | Unknown class | |