LOINCActiveObservation

LOINC Code 17785-7: Radioactive iodine.thyroid/Radioactive iodine dose (Thyroid) [Ratio]

17785-7 is a LOINC code used to identify Radioactive iodine.thyroid/Radioactive iodine dose (Thyroid) [Ratio] 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 Radioactive iodine.thyroid/Radioactive iodine.dose. It is commonly used with the system or sample type Thyroid.

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 Radioactive iodine.thyroid/Radioactive iodine.dose. It is commonly used with the system or sample type Thyroid.

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: Observation

What it does not mean

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

Key facts

  • Radioactive iodine.thyroid/Radioactive iodine dose [Ratio]
  • Radioactive iodine.thyroid/Radioactive iodine.dose
  • c616; Chemistry; i; I-; Point in time; QNT; Quan; Quant; Quantitative; RAI Uptake; Random; Ratios; Rto; Thy

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

Radioactive iodine.thyroid/Radioactive iodine dose (Thyroid) [Ratio]Radioactive iodine.thyroid/Radioactive iodine dose [Ratio]RAI Uptake Thyroid-RtoRadioactive iodine.thyroid/Radioactive iodine.doseCHEMRadioactive iodine.thyroid/Radioactive Iodine Dose, ThyroidRatio

Frequently asked questions

Code details

Code17785-7
SystemLOINC
Display nameRadioactive iodine.thyroid/Radioactive iodine dose (Thyroid) [Ratio]
DescriptionRadioactive iodine.thyroid/Radioactive iodine.dose
Short nameRAI Uptake Thyroid-Rto
ComponentRadioactive iodine.thyroid/Radioactive iodine.dose
PropertyRatio
TimingPt
System (specimen)Thyroid
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.15

Consumer names

Radioactive iodine.thyroid/Radioactive Iodine Dose, Thyroid

Part names

Radioactive iodine.thyroid/Radioactive iodine.doseRatioPtThyroidQnPoint 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 17785-7 | HealthAssure