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.

LOINCActiveBoth

LOINC Code 42138-8: US Guidance for localization of placenta

Name: LOINC Code 42138-8: US Guidance for localization of placenta
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.127Z

42138-8 is a LOINC code used to identify US Guidance for localization of placenta 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 Guidance for localization of placenta. It is commonly used with the system or sample type Uterus.

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 Guidance for localization of placenta. It is commonly used with the system or sample type Uterus.

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: Both
Method: US

What it does not mean

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

Key facts

US Guidance for localization of placenta
Guidance for localization of placenta
Echography; Finding; Findings; Guid; Guide; Guided; Gyn; Gynecology; Local; Narrative; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Placenta loc; Point in time; Random; Report; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Uterine

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

US Guidance for localization of placentaPlacenta US local guid USGuidance for localization of placentaOB.USFindPtUterus

Frequently asked questions

Code details

Code42138-8

SystemLOINC

Display nameUS Guidance for localization of placenta

DescriptionGuidance for localization of placenta

Short namePlacenta US local guid US

ComponentGuidance for localization of placenta

PropertyFind

TimingPt

System (specimen)Uterus

ScaleNar

MethodUS

ClassOB.US

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.29

Part names

Guidance for localization of placentaFindPtUterusNarUSFindingPoint in time (spot)Ultrasound

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.