LOINCActiveBoth

LOINC Code 59588-4: 1-Hydroxymidazolam (Mec) [Mass/Mass]

59588-4 is a LOINC code used to identify 1-Hydroxymidazolam (Mec) [Mass/Mass] 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 1-Hydroxymidazolam. It is commonly used with the system or sample type Meconium.

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 1-Hydroxymidazolam. It is commonly used with the system or sample type Meconium.

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: Both

What it does not mean

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

Key facts

  • 1-Hydroxymidazolam [Mass/mass] in Meconium
  • 1-Hydroxymidazolam
  • 1-Hydroxy midazolam; 1OH-midazolam; Alpha hydroxymidazolam; Alpha-hydroxymidazolam; Chlonazepam metabolite; DRUG/TOXICOLOGY; Drugs; i; Mass content; Mec; Point in time; QNT; Quan; Quant; Quantitative; Random

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

1-Hydroxymidazolam (Mec) [Mass/Mass]1-Hydroxymidazolam [Mass/mass] in Meconium1OH-midazolam Mec-mCnt1-HydroxymidazolamDRUG/TOX1-Hydroxymidazolam, MeconiumMCnt

Frequently asked questions

Code details

Code59588-4
SystemLOINC
Display name1-Hydroxymidazolam (Mec) [Mass/Mass]
Description1-Hydroxymidazolam
Short name1OH-midazolam Mec-mCnt
Component1-Hydroxymidazolam
PropertyMCnt
TimingPt
System (specimen)Meconium
ScaleQn
ClassDRUG/TOX
Example unitsng/g
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.32
Last changed2.70

Consumer names

1-Hydroxymidazolam, Meconium

Part names

1-HydroxymidazolamMCntPtMeconiumQnMass ContentPoint in time (spot)

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 59588-4 | HealthAssure