LOINCActiveObservation

LOINC Code 73774-2: Onset of labor [US Standard Certificate of Live Birth]

73774-2 is a LOINC code used to identify Onset of labor [US Standard Certificate of Live Birth] 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 Onset of labor. 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 Onset of labor. 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
  • Order vs observation: Observation
  • Method: US standard certificate of live birth

What it does not mean

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

Key facts

Onset of labor [US Standard Certificate of Live Birth]
Onset of labor
In the US Standard Certificate of Live Birth (2003), the onset of labor for a patient is recorded as one of the followingpremature rupture of the membranes (prolonged, greater than or equal to 12 hours before the onset of labor), precipitous labor (less than 3 hours), prolonged labor (greater than or equal to 20 hours) or none of these.
Echography; Finding; Findings; Nominal; Point in time; Random; Sonogram; Sonograph; Sonography; Survey; SURVEY.CDC; ULS; Ultrasound; US live birth

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

Onset of labor [US Standard Certificate of Live Birth]Onset of laborSURVEY.CDCFindPt^PatientNom

Frequently asked questions

Code details

Code73774-2
SystemLOINC
Display nameOnset of labor [US Standard Certificate of Live Birth]
DescriptionOnset of labor
ComponentOnset of labor
PropertyFind
TimingPt
System (specimen)^Patient
ScaleNom
MethodUS standard certificate of live birth
ClassSURVEY.CDC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.44
Last changed2.44

Part names

Onset of laborFindPt^PatientNomUS standard certificate of live birthFindingPoint 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 73774-2 | HealthAssure