LOINCActiveObservation

LOINC Code 87512-0: Work hours per day

87512-0 is a LOINC code used to identify Work hours per day 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 Work Hs per D. 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 Work Hs per D. 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

What it does not mean

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

Key facts

  • Work hours per day
  • Work Hs per D
  • The number of hours worked in a day or shift for an individual.
  • Count/time; Dextro; H+P; H+P.HX; Job; nRate; Number rate; Number Rate = Count/Time; Occupation; P prime; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Work hours per dayWork Hs per D nRateWork Hs per DH&P.HXNRatPt^Patient

Frequently asked questions

Code details

Code87512-0
SystemLOINC
Display nameWork hours per day
DescriptionWork Hs per D
Short nameWork Hs per D nRate
ComponentWork Hs per D
PropertyNRat
TimingPt
System (specimen)^Patient
ScaleQn
ClassH&P.HX
Example unitshours/day
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.63
Last changed2.63

Part names

Work Hs per DNRatPt^PatientQnWork hours per dayNumber RatePoint 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 87512-0 | HealthAssure