LOINCActive

LOINC Code 21961-8: Organ target(s) First episode Radiation treatment

21961-8 is a LOINC code used to identify Organ target(s) First episode Radiation treatment 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 Organ target(s). It is commonly used with the system or sample type Radiation.Rx.

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 Organ target(s). It is commonly used with the system or sample type Radiation.Rx.

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

What it does not mean

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

Key facts

  • Organ target(s) First episode Radiation treatment
  • Organ target(s)
  • Identifies the volume or anatomic target of the most clinically significant regional radiation therapy delivered to the patient during the first course of therapy. See also Rad--Regional RX Modality [1570]... NAACCR Data Standards and Data Dictionary Version 11
  • 1st; Anatomy; Nominal; Oncology; Rad; Radiation Rx; S prime; Treatment; TUMOR REGISTRY(NAACCR)

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

Organ target(s) First episode Radiation treatmentOrgan target(s) 1st episode Radiation RxOrgan target(s)TUMRRGTAnatEpisode^frstRadiation.Rx

Frequently asked questions

Code details

Code21961-8
SystemLOINC
Display nameOrgan target(s) First episode Radiation treatment
DescriptionOrgan target(s)
Short nameOrgan target(s) 1st episode Radiation Rx
ComponentOrgan target(s)
PropertyAnat
TimingEpisode^frst
System (specimen)Radiation.Rx
ScaleNom
ClassTUMRRGT
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.32

Part names

Organ target(s)AnatEpisode^frstRadiation.RxNomAnatomyRadiation Rx

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.