LOINCObservation

LOINC Code 77304-4: Radiation dose [Energy/mass]

77304-4 is a LOINC code used to identify Radiation dose [Energy/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 Radiation dose. It is commonly used with the system or sample type Dose.

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 Radiation dose. It is commonly used with the system or sample type Dose.

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: TRIAL
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Radiation dose [Energy/mass]
  • Radiation dose
  • Used to report the dosage (amount) of radiation given (or requested to be given) during a care action, such for a procedure or diagnostic study.
  • Dose med or substance; Energy content; H+P; H+P.HX; P prime; QNT; Quan; Quant; Quantitative

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

Radiation dose [Energy/mass]Radiation doseH&P.HXEngCntProcedure durDoseQn

Frequently asked questions

Code details

Code77304-4
SystemLOINC
Display nameRadiation dose [Energy/mass]
DescriptionRadiation dose
Short nameRadiation dose
ComponentRadiation dose
PropertyEngCnt
TimingProcedure dur
System (specimen)Dose
ScaleQn
ClassH&P.HX
Example unitscGy
StatusTRIAL
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Part names

Radiation doseEngCntProcedure durDoseQnEnergy ContentProcedure duration

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 77304-4 | HealthAssure