LOINCActiveObservation

LOINC Code 91604-9: Device count

91604-9 is a LOINC code used to identify Device count 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 Device count. It is commonly used with the system or sample type {Device}.

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 Device count. It is commonly used with the system or sample type {Device}.

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

  • Device count
  • Health agency equipment type quantity. Could be repeated element
  • Cnt; Count; Number; 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

Device countDEVICESNumPt{Device}QnNumber (count)

Frequently asked questions

Code details

Code91604-9
SystemLOINC
Display nameDevice count
Short nameDevice count
ComponentDevice count
PropertyNum
TimingPt
System (specimen){Device}
ScaleQn
ClassDEVICES
Example units#
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.66
Last changed2.68

Part names

Device countNumPt{Device}QnNumber (count)Point 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 91604-9 | HealthAssure