LOINCOrder

LOINC Code 109501-7: T4 (DBS) [Measurement]

109501-7 is a LOINC code used to identify T4 (DBS) [Measurement] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Thyroxine. It is commonly used with the system or sample type Bld.dot.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Thyroxine. It is commonly used with the system or sample type Bld.dot.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: TRIAL
  • Order vs observation: Order

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

Thyroxine (T4) [Measurement] in DBS
Thyroxine
This term is intended to collate similar measurements for the LOINC SNOMED CT Collaboration in an ontological view. Additionally, it can be used to communicate a laboratory order, either alone or in combination with specimen or other information in the order. It may NOT be used to report back the measured patient value. [https//lo.inc/ce2mb6]
Blood; DBS; Dried blood spot; Filter paper; FP; Lab orders; Levothyroxine; Levo-thyroxine; L-thyroxine; Msmt; T4; T-4; thyroid hormone; Thyrox; Thyroxin; Thyrx; Total T4; TT4; WB; Whole blood

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

T4 (DBS) [Measurement]Thyroxine (T4) [Measurement] in DBST4 Msmt DBSThyroxineLABORDERS.ONTOLOGYT4, Dried blood spot{Measurement}

Frequently asked questions

Code details

Code109501-7
SystemLOINC
Display nameT4 (DBS) [Measurement]
DescriptionThyroxine
Short nameT4 Msmt DBS
ComponentThyroxine
Property{Measurement}
Timing-
System (specimen)Bld.dot
Scale-
ClassLABORDERS.ONTOLOGY
StatusTRIAL
Order/ObservationOrder

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.81
Last changed2.81

Consumer names

T4, Dried blood spot

Part names

Thyroxine{Measurement}-Bld.dotMeasurementDBS

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 109501-7 | HealthAssure