LOINCActiveObservation

LOINC Code 1391-2: Cortisol Free 48 Hr post 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]

1391-2 is a LOINC code used to identify Cortisol Free 48 Hr post 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol] 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 Cortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6h. 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 Cortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6h. 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

  • Cortisol Free [Mass/volume] in 24 hour Urine --48 hours post 500 ug dexamethasone PO 2.5 day low dose q6h
  • Cortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6h
  • 1 day; 17-Hydroxycorticosterone; 24 hours; 24HR; 48h p 500 ug Dex; After; c350; CHEMISTRY.CHALLENGE TESTING; Compound F; Coritsol; Cort; Cortis F; Decadron; Dexameth; Dexone; F; FR; Hexadrol; hydrocortisone; Level; lo dose; Mass Concentration; mcg; Non-protein bound; p 500 ug Dex; PST; QNT; Quan; Quant; Quantitative; UA; UR; Urn

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

Cortisol Free 48 Hr post 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]Cortisol Free [Mass/volume] in 24 hour Urine --48 hours post 500 ug dexamethasone PO 2.5 day low dose q6hCortis F 48h p 500 ug Dex 24h Ur-mCncCortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6hCHALFree cortisol 48 hr after 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, UrineMCnc

Frequently asked questions

Code details

Code1391-2
SystemLOINC
Display nameCortisol Free 48 Hr post 500 ug dexamethasone PO 2.5 day low dose q6h (24H U) [Mass/Vol]
DescriptionCortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6h
Short nameCortis F 48h p 500 ug Dex 24h Ur-mCnc
ComponentCortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6h
PropertyMCnc
Timing24H
System (specimen)Urine
ScaleQn
ClassCHAL
Example unitsng/mL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.34

Consumer names

Free cortisol 48 hr after 500 ug Dexamethasone By Mouth 2.5 day Low dose Q6h, Urine

Part names

Cortisol.free^48H post 500 ug dexamethasone PO 2.5 day low dose q6hMCnc24HUrineQnMass Concentration24 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.