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.

LOINC

LOINC Code 64696-8: Since the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [PhenX]

Name: LOINC Code 64696-8: Since the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:44.549Z

64696-8 is a LOINC code used to identify Since the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [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 Since the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual period. 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 Since the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual period. 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

Since the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [PhenX]
Since the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual period
Finding; Findings; III; month; No menstrual period 3 or more Mos; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen

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

Since the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [PhenX]No menstrual period 3 or more Mos PhenXSince the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual periodPHENXFindPt^Patient

Frequently asked questions

Code details

Code64696-8

SystemLOINC

Display nameSince the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual period [PhenX]

DescriptionSince the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual period

Short nameNo menstrual period 3 or more Mos PhenX

ComponentSince the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual period

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Since the age of 18, have you ever experienced a time interval of 3 or more Mo when you did not have a menstrual periodFindPt^PatientOrdPhenXSince the age of 18, have you ever experienced a time interval of 3 or months when you did not have a menstrual periodFindingPoint 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.