LOINC Home

{component}   LP432695-7

Laboratory   LP29693-6

Chemistry and Chemistry - challenge   LP343631-0

Chemistry - non-challenge   LP7786-9

Endocrine   LP31396-2

Thyroid Hormones-   LP31666-8

Thyroxine   LP15900-1

Thyroxine free   LP29119-2

LOINC Hierarchy


Select the title to see children of the section (▸) or the LOINC code. Select a code to view information about the section/code.

▸ Thyroxine free index   LP28551-7

▸ Thyroxine free | DBS | Chemistry - non-challenge   LP381517-4

▸ Thyroxine free | Blood cord | Chemistry - non-challenge   LP381518-2

▸ Thyroxine.free.gestational   LP433621-2

▸ Thyroxine free | Serum or Plasma | Chemistry - non-challenge   LP381519-0


Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.

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