Lab
T4 medical abbreviation
T4 means "thyroxine".
Each meaning matched at least two public references (2 in all for T4), checked October 23, 2026. The table lists them.
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What T4 means
| Meaning | Latin origin | Where used | Checked against |
|---|---|---|---|
| thyroxine | None | Lab orders, Charting |
Example
Sample lab order: "free T4."
A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.
Related abbreviations
Elsewhere on Rivvi
Questions
What does T4 mean in medical terms?
T4 means "thyroxine".
Where is T4 used?
T4 shows up in lab orders and charting. Its category here is lab.
Is T4 on the Joint Commission Do Not Use list?
No. T4 is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.