LOINCActiveBoth

LOINC Code 73939-1: HYDROcodone Free (Bld) [Mass/Vol]

73939-1 is a LOINC code used to identify HYDROcodone Free (Bld) [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 HYDROcodone.free. It is commonly used with the system or sample type Bld.

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 HYDROcodone.free. It is commonly used with the system or sample type Bld.

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

  • HYDROcodone Free [Mass/volume] in Blood
  • HYDROcodone.free
  • Anexsia; Blood; Dihydrocodeinone; DRUG/TOXICOLOGY; Drugs; FR; HYDROcodone Free; Level; Mass concentration; Non-protein bound; Point in time; QNT; Quan; Quant; Quantitative; Random; Vicodin; 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

HYDROcodone Free (Bld) [Mass/Vol]HYDROcodone Free [Mass/volume] in BloodHYDROcodone Free Bld-mCncHYDROcodone.freeDRUG/TOXFree HYDROcodone, BloodMCnc

Frequently asked questions

Code details

Code73939-1
SystemLOINC
Display nameHYDROcodone Free (Bld) [Mass/Vol]
DescriptionHYDROcodone.free
Short nameHYDROcodone Free Bld-mCnc
ComponentHYDROcodone.free
PropertyMCnc
TimingPt
System (specimen)Bld
ScaleQn
ClassDRUG/TOX
Example unitsng/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.44
Last changed2.73

Consumer names

Free HYDROcodone, Blood

Part names

HYDROcodone.freeMCncPtBldQnHYDROcodone FreeMass ConcentrationPoint in time (spot)Blood

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 73939-1 | HealthAssure