LOINCActiveBoth

LOINC Code 78829-9: Gamma hydroxybutyrate (Hair) [Mass/Mass]

78829-9 is a LOINC code used to identify Gamma hydroxybutyrate (Hair) [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 Gamma hydroxybutyrate. It is commonly used with the system or sample type Hair.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Gamma hydroxybutyrate. It is commonly used with the system or sample type Hair.

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

Gamma hydroxybutyrate [Mass/mass] in Hair
Gamma hydroxybutyrate
Gamma hydroxybutyrate can be detected in hair even months after ingestion. To detect gamma hydroxybutyrate in urine, the sample must be taken within 8-12 hours of ingestion. [PMID24350046]
4-hydroxybutyrate; 4-hydroxybutyric acid; DRUG/TOXICOLOGY; Drugs; Gamma hydroxy butyrate; Gamma-hydroxybutyrate; Gamma-OH; GBH; Georgia home boy; GHb; G-OH-Butyr; Goop; Har; Hydroxybutyric acid; Liquidx; Mass content; 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

Gamma hydroxybutyrate (Hair) [Mass/Mass]Gamma hydroxybutyrate [Mass/mass] in HairG-OH-Butyr Hair-mCntGamma hydroxybutyrateDRUG/TOXGamma hydroxybutyrate, HairMCnt

Frequently asked questions

Code details

Code78829-9
SystemLOINC
Display nameGamma hydroxybutyrate (Hair) [Mass/Mass]
DescriptionGamma hydroxybutyrate
Short nameG-OH-Butyr Hair-mCnt
ComponentGamma hydroxybutyrate
PropertyMCnt
TimingPt
System (specimen)Hair
ScaleQn
ClassDRUG/TOX
Example unitspg/mg
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.54

Consumer names

Gamma hydroxybutyrate, Hair

Part names

Gamma hydroxybutyrateMCntPtHairQnMass 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 78829-9 | HealthAssure