LOINCActiveObservation

LOINC Code 95581-5: Tetrahydrocortisol (24H U) [Z-score]

95581-5 is a LOINC code used to identify Tetrahydrocortisol (24H U) [Z-score] 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 Tetrahydrocortisol. It is commonly used with the system or sample type Urine.

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 Tetrahydrocortisol. It is commonly used with the system or sample type Urine.

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: ACTIVE
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Tetrahydrocortisol [Z-score] in 24 hour Urine
  • Tetrahydrocortisol
  • 1 day; 24 hours; 24HR; Chemistry; Endocrine; Endocrinology; QNT; Quan; Quant; Quantitative; Standard score; THC; THF; UA; UR; Urn; Z score; Z value; Z-score

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

Tetrahydrocortisol (24H U) [Z-score]Tetrahydrocortisol [Z-score] in 24 hour UrineTHF 24h Z-score UrTetrahydrocortisolCHEMTetrahydrocortisol, UrineZscore

Frequently asked questions

Code details

Code95581-5
SystemLOINC
Display nameTetrahydrocortisol (24H U) [Z-score]
DescriptionTetrahydrocortisol
Short nameTHF 24h Z-score Ur
ComponentTetrahydrocortisol
PropertyZscore
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
Example unitsZscore
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.69
Last changed2.69

Consumer names

Tetrahydrocortisol, Urine

Part names

TetrahydrocortisolZscore24HUrineQnZ-score24 hours

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 95581-5 | HealthAssure