LOINCActiveObservation

LOINC Code 58817-8: E2 spec 3 [Mass/Vol]

58817-8 is a LOINC code used to identify E2 spec 3 [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 Estradiol^3rd specimen. It is commonly used with the system or sample type Ser/Plas.

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 Estradiol^3rd specimen. It is commonly used with the system or sample type Ser/Plas.

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

  • Estradiol (E2) [Mass/volume] in Serum or Plasma --3rd specimen
  • Estradiol^3rd specimen
  • 17-beta estradiol; CHEMISTRY.CHALLENGE TESTING; E2; Gyn; Gynecology; Level; Mass concentration; OB; ObGyn; Obstetrics; Oestradiol; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; sp3; Spec; SR

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

E2 spec 3 [Mass/Vol]Estradiol (E2) [Mass/volume] in Serum or Plasma --3rd specimenEstradiol sp3 SerPl-mCncEstradiol^3rd specimenCHALEstradiol specimen 3, BloodMCnc

Frequently asked questions

Code details

Code58817-8
SystemLOINC
Display nameE2 spec 3 [Mass/Vol]
DescriptionEstradiol^3rd specimen
Short nameEstradiol sp3 SerPl-mCnc
ComponentEstradiol^3rd specimen
PropertyMCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHAL
Example unitspg/mL
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.32
Last changed2.70

Consumer names

Estradiol specimen 3, Blood

Part names

Estradiol^3rd specimenMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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 58817-8 | HealthAssure