LOINCActiveObservation

LOINC Code 81538-1: PROMIS cognitive function - version 2.0 T-score

81538-1 is a LOINC code used to identify PROMIS cognitive function - version 2.0 T-score 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 PROMIS cognitive function - version 2.0 T-score. 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 PROMIS cognitive function - version 2.0 T-score. 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: PROMIS

What it does not mean

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

Key facts

  • PROMIS cognitive function - version 2.0 T-score
  • Cogn func; cognition; cognitive status; FCN; Func; Funct; Patient Reported Outcomes Information System; Point in time; promise; QNT; Quan; Quant; Quantitative; Random; Survey; SURVEY.PROMIS; T prime; T-score

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

PROMIS cognitive function - version 2.0 T-scoreSURVEY.PROMISTscorePt^PatientQnPROMIS

Frequently asked questions

Code details

Code81538-1
SystemLOINC
Display namePROMIS cognitive function - version 2.0 T-score
ComponentPROMIS cognitive function - version 2.0 T-score
PropertyTscore
TimingPt
System (specimen)^Patient
ScaleQn
MethodPROMIS
ClassSURVEY.PROMIS
Example unitsTscore
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.56

Part names

PROMIS cognitive function - version 2.0 T-scoreTscorePt^PatientQnPROMIST-scorePoint 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 81538-1 | HealthAssure