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.

LOINCActiveObservation

LOINC Code 49091-2: Neural tube defect risk Based on maternal age Qn (fetus)

Name: LOINC Code 49091-2: Neural tube defect risk Based on maternal age Qn (fetus)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:33.937Z

49091-2 is a LOINC code used to identify Neural tube defect risk Based on maternal age Qn (fetus) 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 Neural tube defect risk. It is commonly used with the system or sample type ^Fetus.

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 Neural tube defect risk. It is commonly used with the system or sample type ^Fetus.

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
Method: Based on maternal age

What it does not mean

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

Key facts

Fetal Neural tube defect risk [Likelihood] Based on maternal age
Neural tube defect risk
Anencephaly; Chemistry; Fetal; from Mat age; Gyn; Gynecology; Neural tube def; Neural tube defct; NTD; OB; ObGyn; Obstetrics; ONTD; Open spina bifida; OSB; Point in time; QNT; Quan; Quant; Quantitative; Random; Risk

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

Neural tube defect risk Based on maternal age Qn (fetus)Fetal Neural tube defect risk [Likelihood] Based on maternal ageFet Neural tube def risk from Mat age QnNeural tube defect riskCHEMFetal Neural tube defect riskLikelihood

Frequently asked questions

Code details

Code49091-2

SystemLOINC

Display nameNeural tube defect risk Based on maternal age Qn (fetus)

DescriptionNeural tube defect risk

Short nameFet Neural tube def risk from Mat age Qn

ComponentNeural tube defect risk

PropertyLikelihood

TimingPt

System (specimen)^Fetus

ScaleQn

MethodBased on maternal age

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.21

Last changed2.73

Consumer names

Fetal Neural tube defect risk

Part names

Neural tube defect riskLikelihoodPt^FetusQnBased on maternal agePoint 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.