LOINC

LOINC Code 64640-6: What is your age when your testicles started increasing in size [PhenX]

64640-6 is a LOINC code used to identify What is your age when your testicles started increasing in size [PhenX] 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 What is your age when your testicles started increasing in size. 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 What is your age when your testicles started increasing in size. 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: TRIAL
  • Method: PhenX

What it does not mean

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

Key facts

  • What is your age when your testicles started increasing in size [PhenX]
  • What is your age when your testicles started increasing in size
  • Point in time; QNT; Quan; Quant; Quantitative; Random; Testicle size increase age

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

What is your age when your testicles started increasing in size [PhenX]Testicle size increase age PhenXWhat is your age when your testicles started increasing in sizePHENXTimePt^Patient

Frequently asked questions

Code details

Code64640-6
SystemLOINC
Display nameWhat is your age when your testicles started increasing in size [PhenX]
DescriptionWhat is your age when your testicles started increasing in size
Short nameTesticle size increase age PhenX
ComponentWhat is your age when your testicles started increasing in size
PropertyTime
TimingPt
System (specimen)^Patient
ScaleQn
MethodPhenX
ClassPHENX
Example unitsyears
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.65

Part names

What is your age when your testicles started increasing in sizeTimePt^PatientQnPhenXTime (e.g. seconds)Point 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 64640-6 | HealthAssure