What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActive

LOINC Code 63883-3: At what age did you first take progesterone or a progestin [CA Teachers]

Name: LOINC Code 63883-3: At what age did you first take progesterone or a progestin [CA Teachers]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.947Z

63883-3 is a LOINC code used to identify At what age did you first take progesterone or a progestin [CA Teachers] 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 At what age did you first take progesterone or a progestin. It is commonly used with the system or sample type ^Patient.

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 At what age did you first take progesterone or a progestin. It is commonly used with the system or sample type ^Patient.

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
Method: California Teachers Study

What it does not mean

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

Key facts

At what age did you first take progesterone or a progestin [CA Teachers]
At what age did you first take progesterone or a progestin
CA; Calif; CTS; P4; PhenX; Point in time; Prog; Proges; Progest; Progesterone age first; Progestin; QNT; Quan; Quant; Quantitative; Random

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

At what age did you first take progesterone or a progestin [CA Teachers]Progesterone age first CTSAt what age did you first take progesterone or a progestinPHENXTimePt^Patient

Frequently asked questions

Code details

Code63883-3

SystemLOINC

Display nameAt what age did you first take progesterone or a progestin [CA Teachers]

DescriptionAt what age did you first take progesterone or a progestin

Short nameProgesterone age first CTS

ComponentAt what age did you first take progesterone or a progestin

PropertyTime

TimingPt

System (specimen)^Patient

ScaleQn

MethodCalifornia Teachers Study

ClassPHENX

Example unitsyears

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

At what age did you first take progesterone or a progestinTimePt^PatientQnCalifornia Teachers StudyTime (e.g. seconds)Point in time (spot)CA Teachers

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.